Physics Syllabus (JEE Main)
Q. What is the work done in moving a charge of +2μC through a potential difference of 5V?
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A.
10 μJ
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B.
5 μJ
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C.
2 μJ
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D.
1 μJ
Solution
Work done W = q * V = (2 × 10^-6 C) * (5 V) = 10 μJ.
Correct Answer: A — 10 μJ
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Q. What is the work done in moving a charge of 2 μC from a point at 50 V to a point at 100 V?
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A.
0.1 mJ
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B.
0.2 mJ
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C.
0.3 mJ
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D.
0.4 mJ
Solution
Work done W = q * ΔV = 2 × 10^-6 C * (100 V - 50 V) = 2 × 10^-6 * 50 = 0.1 mJ.
Correct Answer: B — 0.2 mJ
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Q. What is the work done in moving a charge of 2 μC from a point at 50 V to another at 100 V?
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A.
100 μJ
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B.
200 μJ
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C.
150 μJ
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D.
50 μJ
Solution
Work done W = q * ΔV = (2 × 10^-6 C) * (100 V - 50 V) = 100 μJ.
Correct Answer: B — 200 μJ
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Q. What is the work done in moving a mass from a point A to point B in a uniform gravitational field?
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A.
Depends on the path taken
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B.
Zero
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C.
Equal to the change in gravitational potential energy
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D.
Equal to the gravitational force times distance
Solution
The work done is equal to the change in gravitational potential energy, which depends on the initial and final positions.
Correct Answer: C — Equal to the change in gravitational potential energy
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Q. What is the work done in moving an object from a point A to point B in a uniform gravitational field?
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A.
Depends on the path taken
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B.
Zero
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C.
Depends on the mass of the object
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D.
Depends on the height difference
Solution
The work done in moving an object in a uniform gravitational field depends only on the height difference between points A and B.
Correct Answer: D — Depends on the height difference
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Q. What is the work done in moving an object from one point to another in a gravitational field?
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A.
Depends on the path taken
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B.
Is always zero
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C.
Depends only on the initial and final positions
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D.
Is maximum at the highest point
Solution
The work done in moving an object in a gravitational field depends only on the initial and final positions, not the path taken.
Correct Answer: C — Depends only on the initial and final positions
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Q. What is the work done on a gas during an isochoric process?
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A.
Positive
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B.
Negative
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C.
Zero
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D.
Depends on the gas
Solution
In an isochoric process, the volume remains constant, which means no work is done on or by the gas. Therefore, the work done is zero.
Correct Answer: C — Zero
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Q. What is the work function of a metal if the threshold frequency is 5 x 10^14 Hz?
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A.
3.1 eV
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B.
2.5 eV
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C.
4.1 eV
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D.
1.6 eV
Solution
The work function φ can be calculated using φ = hf, where h = 6.63 x 10^-34 J.s and f = 5 x 10^14 Hz, giving φ ≈ 3.1 eV.
Correct Answer: A — 3.1 eV
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Q. What is the work function of a metal?
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A.
The energy required to ionize an atom
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B.
The energy required to remove an electron from the surface of a metal
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C.
The energy of the emitted electrons
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D.
The energy of the incident photons
Solution
The work function is the minimum energy required to remove an electron from the surface of a metal.
Correct Answer: B — The energy required to remove an electron from the surface of a metal
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Q. What is the work-energy theorem?
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A.
Work done is equal to change in momentum
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B.
Work done is equal to change in kinetic energy
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C.
Work done is equal to change in potential energy
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D.
Work done is equal to change in total energy
Solution
The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy.
Correct Answer: B — Work done is equal to change in kinetic energy
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Q. What type of circuit is a potentiometer typically used in?
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A.
Series circuit
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B.
Parallel circuit
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C.
Open circuit
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D.
Closed circuit
Solution
A potentiometer is typically used in a closed circuit to measure voltage without drawing current.
Correct Answer: D — Closed circuit
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Q. What type of circuit is typically used in a potentiometer setup?
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A.
Series circuit
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B.
Parallel circuit
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C.
Combination circuit
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D.
Open circuit
Solution
A potentiometer setup typically uses a series circuit to ensure a constant current flows through the wire.
Correct Answer: A — Series circuit
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Q. What type of damping is characterized by the system oscillating with gradually decreasing amplitude?
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A.
Underdamping
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B.
Critical damping
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C.
Overdamping
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D.
No damping
Solution
Underdamping is characterized by oscillations with gradually decreasing amplitude.
Correct Answer: A — Underdamping
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Q. What type of damping occurs when the damping force is proportional to the velocity of the oscillator?
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A.
Critical damping
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B.
Underdamping
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C.
Overdamping
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D.
Linear damping
Solution
Linear damping occurs when the damping force is directly proportional to the velocity of the oscillator.
Correct Answer: D — Linear damping
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Q. What type of damping occurs when the damping ratio is greater than 1?
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A.
Underdamped
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B.
Critically damped
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C.
Overdamped
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D.
Free oscillation
Solution
When the damping ratio is greater than 1, the system is overdamped and returns to equilibrium without oscillating.
Correct Answer: C — Overdamped
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Q. What type of decay involves the emission of a helium nucleus?
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A.
Alpha decay
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B.
Beta decay
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C.
Gamma decay
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D.
Neutron decay
Solution
Alpha decay involves the emission of an alpha particle, which is a helium nucleus.
Correct Answer: A — Alpha decay
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Q. What type of diffraction occurs when light passes through a circular aperture?
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A.
Single-slit diffraction
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B.
Double-slit diffraction
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C.
Fresnel diffraction
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D.
Fraunhofer diffraction
Solution
When light passes through a circular aperture, it exhibits Fresnel diffraction, characterized by a pattern of concentric rings.
Correct Answer: C — Fresnel diffraction
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Q. What type of diffraction pattern is produced by a circular aperture?
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A.
Single slit pattern
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B.
Double slit pattern
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C.
Airy pattern
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D.
Uniform pattern
Solution
A circular aperture produces an Airy pattern, characterized by a central bright spot surrounded by concentric dark and bright rings.
Correct Answer: C — Airy pattern
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Q. What type of energy is primarily converted to kinetic energy when a rolling object descends a slope?
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A.
Potential energy
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B.
Thermal energy
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C.
Elastic energy
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D.
Chemical energy
Solution
As the object descends, its gravitational potential energy is converted into kinetic energy.
Correct Answer: A — Potential energy
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Q. What type of fluid exhibits a constant viscosity regardless of the shear rate?
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A.
Newtonian fluid
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B.
Non-Newtonian fluid
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C.
Ideal fluid
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D.
Real fluid
Solution
Newtonian fluids have a constant viscosity that does not change with the shear rate.
Correct Answer: A — Newtonian fluid
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Q. What type of fluid has a constant viscosity regardless of the shear rate?
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A.
Newtonian fluid
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B.
Non-Newtonian fluid
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C.
Ideal fluid
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D.
Real fluid
Solution
A Newtonian fluid has a constant viscosity that does not change with the shear rate.
Correct Answer: A — Newtonian fluid
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Q. What type of image is formed by a concave lens when the object is placed at infinity?
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A.
Real and inverted
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B.
Virtual and upright
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C.
Real and upright
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D.
Virtual and inverted
Solution
A concave lens always forms a virtual and upright image regardless of the object's position.
Correct Answer: B — Virtual and upright
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Q. What type of image is formed by a concave mirror when the object is placed between the focal point and the mirror?
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A.
Real and inverted
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B.
Virtual and upright
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C.
Real and upright
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D.
Virtual and inverted
Solution
When the object is placed between the focal point and the mirror, the image formed is virtual and upright.
Correct Answer: B — Virtual and upright
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Q. What type of image is formed by a convex lens when the object is placed at a distance greater than twice the focal length?
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A.
Real and inverted
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B.
Virtual and upright
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C.
Real and upright
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D.
Virtual and inverted
Solution
When the object is placed beyond twice the focal length, the image is real and inverted.
Correct Answer: A — Real and inverted
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Q. What type of image is formed by a convex lens when the object is placed beyond the focal point?
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A.
Virtual and upright
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B.
Real and inverted
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C.
Real and upright
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D.
Virtual and inverted
Solution
A convex lens forms a real and inverted image when the object is beyond the focal point.
Correct Answer: B — Real and inverted
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Q. What type of image is formed by a convex mirror?
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A.
Real and inverted
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B.
Real and upright
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C.
Virtual and upright
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D.
Virtual and inverted
Solution
A convex mirror always forms a virtual and upright image regardless of the object's position.
Correct Answer: C — Virtual and upright
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Q. What type of lens is used to correct hyperopia (farsightedness)?
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A.
Convex lens
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B.
Concave lens
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C.
Bifocal lens
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D.
Cylindrical lens
Solution
Hyperopia is corrected using a convex lens, which converges light rays before they enter the eye, allowing for clear vision of nearby objects.
Correct Answer: A — Convex lens
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Q. What type of light is completely polarized?
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A.
Unpolarized light
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B.
Partially polarized light
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C.
Linearly polarized light
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D.
Circularly polarized light
Solution
Linearly polarized light consists of waves that oscillate in a single plane, making it completely polarized.
Correct Answer: C — Linearly polarized light
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Q. What type of light is produced by a laser?
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A.
Unpolarized light
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B.
Partially polarized light
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C.
Completely polarized light
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D.
Diffused light
Solution
Lasers emit light that is completely polarized because the light waves are emitted in a single direction and phase.
Correct Answer: C — Completely polarized light
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Q. What type of orbit does a satellite in a geosynchronous orbit have?
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A.
Elliptical orbit
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B.
Circular orbit
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C.
Parabolic orbit
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D.
Hyperbolic orbit
Solution
A geosynchronous satellite typically has a circular orbit to maintain a constant position relative to the Earth's surface.
Correct Answer: B — Circular orbit
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