Physics Syllabus (JEE Main)
Q. Which of the following is a characteristic of a Newtonian fluid?
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A.
Viscosity changes with shear rate
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B.
Viscosity remains constant
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C.
Non-linear stress-strain relationship
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D.
High compressibility
Solution
A Newtonian fluid has a constant viscosity regardless of the shear rate applied.
Correct Answer: B — Viscosity remains constant
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Q. Which of the following is a characteristic of a non-Newtonian fluid?
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A.
Constant viscosity
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B.
Viscosity changes with shear rate
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C.
Incompressible
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D.
Always flows in a straight line
Solution
Non-Newtonian fluids exhibit a change in viscosity with varying shear rates, unlike Newtonian fluids which have a constant viscosity.
Correct Answer: B — Viscosity changes with shear rate
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Q. Which of the following is a characteristic of a polar orbiting satellite?
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A.
It orbits above the equator
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B.
It has a fixed position relative to the Earth
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C.
It passes over the poles
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D.
It is used for communication
Solution
A polar orbiting satellite passes over the poles, allowing it to cover the entire surface of the Earth over time.
Correct Answer: C — It passes over the poles
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Q. Which of the following is a characteristic of a sound wave?
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A.
Transverse wave
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B.
Longitudinal wave
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C.
Electromagnetic wave
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D.
Static wave
Solution
Sound waves are longitudinal waves, where the particle displacement is parallel to the direction of wave propagation.
Correct Answer: B — Longitudinal wave
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Q. Which of the following is a characteristic of alpha particles?
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A.
High penetration power
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B.
No charge
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C.
Consist of 2 protons and 2 neutrons
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D.
Lightest form of radiation
Solution
Alpha particles consist of 2 protons and 2 neutrons, making them a helium nucleus.
Correct Answer: C — Consist of 2 protons and 2 neutrons
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Q. Which of the following is a characteristic of an ideal fluid?
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A.
Incompressible
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B.
Viscous
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C.
Non-conductive
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D.
Reactive
Solution
An ideal fluid is defined as incompressible and having no viscosity.
Correct Answer: A — Incompressible
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Q. Which of the following is a characteristic of beta decay?
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A.
Emission of alpha particles
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B.
Conversion of a neutron into a proton
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C.
Emission of gamma rays
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D.
No change in atomic number
Solution
In beta decay, a neutron is converted into a proton, resulting in an increase in atomic number by one.
Correct Answer: B — Conversion of a neutron into a proton
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Q. Which of the following is a characteristic of digital communication systems?
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A.
Continuous signal representation
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B.
Higher susceptibility to noise
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C.
Easier encryption and security
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D.
Lower data transmission rates
Solution
Digital communication systems allow for easier encryption and security measures compared to analog systems.
Correct Answer: C — Easier encryption and security
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Q. Which of the following is a characteristic of digital signals?
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A.
Continuous in nature
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B.
Discrete in nature
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C.
More susceptible to noise
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D.
Require more bandwidth than analog signals
Solution
Digital signals are discrete in nature, representing data in binary form, which makes them less susceptible to noise compared to analog signals.
Correct Answer: B — Discrete in nature
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Q. Which of the following is a characteristic of gamma radiation?
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A.
It has mass
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B.
It is positively charged
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C.
It has high penetrating power
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D.
It can be deflected by magnetic fields
Solution
Gamma radiation is a form of electromagnetic radiation with high penetrating power and no mass or charge.
Correct Answer: C — It has high penetrating power
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Q. Which of the following is a characteristic of gases?
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A.
Definite shape
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B.
Definite volume
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C.
Compressibility
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D.
Incompressibility
Solution
Gases are highly compressible, meaning their volume can change significantly under pressure.
Correct Answer: C — Compressibility
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Q. Which of the following is a characteristic of intrinsic semiconductors?
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A.
High conductivity
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B.
Temperature-dependent conductivity
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C.
Presence of impurities
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D.
Permanent charge carriers
Solution
Intrinsic semiconductors have conductivity that is highly dependent on temperature, as they have no impurities.
Correct Answer: B — Temperature-dependent conductivity
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Q. Which of the following is a characteristic of isotopes?
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A.
Same number of protons, different number of neutrons
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B.
Different number of protons, same number of neutrons
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C.
Same mass number
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D.
Different chemical properties
Solution
Isotopes have the same number of protons but different numbers of neutrons.
Correct Answer: A — Same number of protons, different number of neutrons
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Q. Which of the following is a characteristic of linearly polarized light?
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A.
It vibrates in all directions
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B.
It vibrates in a single plane
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C.
It has a constant frequency
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D.
It travels faster than unpolarized light
Solution
Linearly polarized light vibrates in a single plane, as opposed to unpolarized light which vibrates in multiple planes.
Correct Answer: B — It vibrates in a single plane
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Q. Which of the following is a characteristic of overdamped systems?
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A.
They oscillate slowly
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B.
They return to equilibrium slowly without oscillating
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C.
They oscillate rapidly
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D.
They have maximum amplitude
Solution
Overdamped systems return to equilibrium slowly without oscillating, as the damping is strong.
Correct Answer: B — They return to equilibrium slowly without oscillating
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Q. Which of the following is a characteristic of underdamped oscillations?
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A.
No oscillation occurs
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B.
Oscillations decay slowly
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C.
Oscillations decay rapidly
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D.
Oscillations are constant
Solution
Underdamped oscillations occur when the damping is weak, allowing the system to oscillate with a gradually decreasing amplitude.
Correct Answer: B — Oscillations decay slowly
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Q. Which of the following is a common application of digital modulation?
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A.
Television broadcasting
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B.
AM radio
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C.
Satellite communication
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D.
Analog audio transmission
Solution
Digital modulation is commonly used in satellite communication.
Correct Answer: C — Satellite communication
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Q. Which of the following is a common application of Phase Shift Keying (PSK)?
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A.
Television broadcasting
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B.
Satellite communication
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C.
AM radio
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D.
FM radio
Solution
Phase Shift Keying (PSK) is commonly used in satellite communication.
Correct Answer: B — Satellite communication
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Q. Which of the following is a consequence of Lenz's law?
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A.
Induced current opposes the change in magnetic flux
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B.
Induced current enhances the change in magnetic flux
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C.
Induced current is always zero
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D.
Induced current is independent of magnetic field
Solution
Lenz's law states that the direction of induced current is such that it opposes the change in magnetic flux.
Correct Answer: A — Induced current opposes the change in magnetic flux
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Q. Which of the following is a consequence of Newton's law of gravitation?
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A.
The orbits of planets are elliptical
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B.
Masses repel each other
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C.
Gravitational force is a vector quantity
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D.
All objects fall at the same rate in a vacuum
Solution
Newton's law of gravitation leads to the conclusion that the orbits of planets are elliptical, as described by Kepler's laws.
Correct Answer: A — The orbits of planets are elliptical
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Q. Which of the following is a consequence of the law of universal gravitation?
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A.
The orbits of planets are elliptical
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B.
All objects fall at the same rate in a vacuum
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C.
Gravity is a contact force
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D.
Mass does not affect gravitational attraction
Solution
The law of universal gravitation leads to the conclusion that the orbits of planets are elliptical, as described by Kepler's laws.
Correct Answer: A — The orbits of planets are elliptical
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Q. Which of the following is a correct application of Ampere's Law?
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A.
Calculating electric field in a capacitor
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B.
Finding the magnetic field in a toroid
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C.
Determining the potential difference across a resistor
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D.
Calculating the energy stored in an inductor
Solution
Ampere's Law is used to find the magnetic field in a toroid, where the symmetry allows for straightforward application of the law.
Correct Answer: B — Finding the magnetic field in a toroid
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Q. Which of the following is a correct representation of significant figures?
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A.
0.00450
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B.
4500
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C.
0.0450
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D.
4500.0
Solution
0.00450 has 3 significant figures due to the trailing zero after the 5.
Correct Answer: A — 0.00450
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Q. Which of the following is a derived unit?
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A.
Meter
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B.
Kilogram
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C.
Second
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D.
Newton
Solution
Newton is a derived unit as it is defined in terms of the base units: 1 N = 1 kg·m/s².
Correct Answer: D — Newton
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Q. Which of the following is a disadvantage of frequency modulation (FM) compared to amplitude modulation (AM)?
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A.
Higher bandwidth requirement
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B.
More susceptible to noise
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C.
Lower fidelity
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D.
Easier to demodulate
Solution
FM requires a larger bandwidth than AM, which can be a disadvantage in certain communication systems.
Correct Answer: A — Higher bandwidth requirement
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Q. Which of the following is a disadvantage of Frequency Modulation (FM)?
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A.
Less bandwidth
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B.
More noise immunity
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C.
Complex receiver design
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D.
Simple implementation
Solution
FM requires a more complex receiver design compared to AM.
Correct Answer: C — Complex receiver design
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Q. Which of the following is a good conductor of heat?
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A.
Wood
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B.
Plastic
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C.
Copper
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D.
Glass
Solution
Copper is a good conductor of heat.
Correct Answer: C — Copper
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Q. Which of the following is a longitudinal wave?
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A.
Light wave
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B.
Sound wave
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C.
Water wave
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D.
Radio wave
Solution
Sound waves are longitudinal waves, where particle displacement is parallel to wave direction.
Correct Answer: B — Sound wave
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Q. Which of the following is a measure of the average kinetic energy of particles in a substance?
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A.
Heat
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B.
Temperature
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C.
Thermal energy
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D.
Latent heat
Solution
Temperature is a measure of the average kinetic energy of particles in a substance.
Correct Answer: B — Temperature
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Q. Which of the following is a method of heat transfer?
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A.
Conduction
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B.
Convection
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C.
Radiation
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D.
All of the above
Solution
Conduction, convection, and radiation are all methods of heat transfer.
Correct Answer: D — All of the above
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