Physics Syllabus (JEE Main)
Q. Which of the following particles is not found in the nucleus of an atom?
A.
Proton
B.
Neutron
C.
Electron
D.
Alpha particle
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Solution
Electrons are not found in the nucleus; they orbit around the nucleus, while protons and neutrons are the constituents of the nucleus.
Correct Answer: C — Electron
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Q. Which of the following particles is not found in the nucleus?
A.
Proton
B.
Neutron
C.
Electron
D.
Alpha particle
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Solution
Electrons are not found in the nucleus; they orbit around it.
Correct Answer: C — Electron
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Q. Which of the following phenomena can be explained by the wave nature of light?
A.
Photoelectric effect
B.
Compton effect
C.
Interference
D.
Electron diffraction
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Solution
Interference is a phenomenon that can be explained by the wave nature of light, as it involves the superposition of light waves.
Correct Answer: C — Interference
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Q. Which of the following phenomena demonstrates the wave-particle duality of light?
A.
Photoelectric effect
B.
Compton effect
C.
Diffraction
D.
All of the above
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Solution
All of the mentioned phenomena (photoelectric effect, Compton effect, and diffraction) demonstrate the wave-particle duality of light.
Correct Answer: D — All of the above
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Q. Which of the following phenomena is a direct result of diffraction?
A.
Interference
B.
Polarization
C.
Refraction
D.
Reflection
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Solution
Diffraction is a phenomenon that leads to interference patterns, as it involves the bending of waves around obstacles.
Correct Answer: A — Interference
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Q. Which of the following phenomena is an example of surface tension?
A.
Water droplets on a leaf
B.
Air bubbles in water
C.
Oil mixing with water
D.
Salt dissolving in water
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Solution
Water droplets on a leaf demonstrate surface tension, as the cohesive forces between water molecules create a 'skin' on the surface.
Correct Answer: A — Water droplets on a leaf
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Q. Which of the following phenomena is explained by the concept of surface tension?
A.
Capillary action
B.
Viscosity
C.
Buoyancy
D.
Elasticity
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Solution
Surface tension is responsible for capillary action, allowing liquids to rise in narrow tubes.
Correct Answer: A — Capillary action
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Q. Which of the following phenomena is explained by the concept of viscosity?
A.
Capillary action
B.
Buoyancy
C.
Fluid flow resistance
D.
Surface tension
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Solution
Viscosity describes the resistance of a fluid to flow, which is a key factor in fluid flow resistance.
Correct Answer: C — Fluid flow resistance
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Q. Which of the following phenomena is NOT a characteristic of wave motion?
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Conduction
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Solution
Conduction is a mode of heat transfer and is not a characteristic of wave motion, while reflection, refraction, and diffraction are.
Correct Answer: D — Conduction
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Q. Which of the following phenomena is NOT a characteristic of waves?
A.
Interference
B.
Diffraction
C.
Reflection
D.
Conduction
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Solution
Conduction is a process of heat transfer and is not a characteristic of wave phenomena.
Correct Answer: D — Conduction
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Q. Which of the following phenomena is NOT a consequence of surface tension?
A.
Formation of droplets
B.
Capillary action
C.
Floating of heavy objects
D.
Shape of bubbles
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Solution
Floating of heavy objects is not a consequence of surface tension; it is due to buoyancy, while the other options are directly related to surface tension.
Correct Answer: C — Floating of heavy objects
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Q. Which of the following phenomena is NOT a result of total internal reflection?
A.
Mirage
B.
Fiber optics
C.
Rainbows
D.
Prism dispersion
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Solution
Prism dispersion involves refraction and not total internal reflection. The other options are phenomena that utilize total internal reflection.
Correct Answer: D — Prism dispersion
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Q. Which of the following phenomena is NOT explained by wave optics?
A.
Interference
B.
Diffraction
C.
Polarization
D.
Photoelectric effect
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Solution
The photoelectric effect is explained by quantum mechanics and particle nature of light, not by wave optics.
Correct Answer: D — Photoelectric effect
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Q. Which of the following phenomena is NOT related to surface tension?
A.
Capillary action
B.
Formation of droplets
C.
Floating of heavy objects
D.
Meniscus formation
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Solution
Floating of heavy objects is not related to surface tension; it is related to buoyancy. The other phenomena are directly influenced by surface tension.
Correct Answer: C — Floating of heavy objects
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Q. Which of the following phenomena is primarily due to surface tension?
A.
Capillary action
B.
Viscosity
C.
Diffusion
D.
Convection
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Solution
Capillary action is primarily due to surface tension, as it allows liquids to rise in narrow tubes against gravity.
Correct Answer: A — Capillary action
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Q. Which of the following phenomena is responsible for the formation of a rainbow?
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Interference
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Solution
The formation of a rainbow is primarily due to the refraction and dispersion of light in water droplets.
Correct Answer: B — Refraction
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Q. Which of the following processes involves a change in temperature?
A.
Isothermal process
B.
Adiabatic process
C.
Isobaric process
D.
Isochoric process
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Solution
In an adiabatic process, the system does not exchange heat with its surroundings, leading to a change in temperature.
Correct Answer: B — Adiabatic process
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Q. Which of the following processes is adiabatic?
A.
Heating a gas in a closed container
B.
Compressing a gas without heat exchange
C.
Cooling a gas at constant pressure
D.
Evaporating water at room temperature
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Solution
An adiabatic process is one in which no heat is exchanged with the surroundings, such as compressing a gas without heat exchange.
Correct Answer: B — Compressing a gas without heat exchange
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Q. Which of the following processes is an example of an adiabatic process?
A.
Heating water in a kettle
B.
Compressing a gas in a piston without heat exchange
C.
Melting ice at room temperature
D.
Boiling water
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Solution
An adiabatic process is one in which no heat is exchanged with the surroundings, such as compressing a gas in a piston without heat exchange.
Correct Answer: B — Compressing a gas in a piston without heat exchange
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Q. Which of the following processes is an example of an isothermal process?
A.
Heating a gas in a closed container
B.
Compressing a gas without heat exchange
C.
Melting ice at 0°C
D.
Cooling a gas at constant pressure
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Solution
Melting ice at 0°C is an isothermal process as the temperature remains constant during the phase change.
Correct Answer: C — Melting ice at 0°C
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Q. Which of the following processes is isothermal for an ideal gas?
A.
Heating at constant volume
B.
Cooling at constant pressure
C.
Expansion against a constant external pressure
D.
Expansion where temperature remains constant
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Solution
An isothermal process for an ideal gas is characterized by the condition that the temperature remains constant during the expansion or compression.
Correct Answer: D — Expansion where temperature remains constant
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Q. Which of the following processes is not a thermodynamic process?
A.
Isothermal
B.
Adiabatic
C.
Isochoric
D.
Static
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Solution
A static process does not involve any change in state variables, hence it is not considered a thermodynamic process.
Correct Answer: D — Static
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Q. Which of the following processes is not governed by the First Law of Thermodynamics?
A.
Isothermal expansion
B.
Adiabatic compression
C.
Isochoric heating
D.
None of the above
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Solution
All the listed processes are governed by the First Law of Thermodynamics, so the answer is 'None of the above'.
Correct Answer: D — None of the above
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Q. Which of the following quantities has the dimension of energy?
A.
Force
B.
Work
C.
Power
D.
Pressure
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Solution
Work is defined as force times distance, and its dimensions are ML^2T^-2, which are the same as energy.
Correct Answer: B — Work
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Q. Which of the following quantities has the dimension of [M^0 L^0 T^-1]?
A.
Velocity
B.
Acceleration
C.
Frequency
D.
Force
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Solution
Frequency has the dimension of [M^0 L^0 T^-1] as it is defined as the number of cycles per unit time.
Correct Answer: C — Frequency
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Q. Which of the following quantities has the dimension of [M^0 L^0 T^0]?
A.
Mass
B.
Time
C.
Length
D.
Angle
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Solution
Angle is a dimensionless quantity and has the dimension of [M^0 L^0 T^0].
Correct Answer: D — Angle
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Q. Which of the following quantities has the dimension of [M^0 L^1 T^-1]?
A.
Velocity
B.
Acceleration
C.
Force
D.
Pressure
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Solution
Velocity has the dimension of [M^0 L^1 T^-1], as it is defined as distance per unit time.
Correct Answer: A — Velocity
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Q. Which of the following quantities has the dimension of [M^0L^2T^-2]?
A.
Energy
B.
Force
C.
Power
D.
Work
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Solution
Energy and work both have the same dimensions of [M^1L^2T^-2]. Power has dimensions of [M^1L^2T^-3].
Correct Answer: A — Energy
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Q. Which of the following quantities has the dimension of [M^1 L^2 T^-2]?
A.
Pressure
B.
Energy
C.
Force
D.
Work
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Solution
Energy has the dimension of [M^1 L^2 T^-2].
Correct Answer: B — Energy
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Q. Which of the following quantities has the dimension of [M⁰L²T⁻²]?
A.
Energy
B.
Force
C.
Power
D.
Work
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Solution
Energy and work both have the same dimensions of [M⁰L²T⁻²], as they are equivalent.
Correct Answer: A — Energy
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