AIIMS Physics Mock Test - 5 - NEET MCQ

A sphere of mass m moving with a constant velocity u hits another stationary sphere of the same mass. If e is the coefficient of restitution, then the ratio of the velocity of two spheres after collision will be

The rest mass of a photon is

A metal plate gets heated, when cathode rays strike against, it due to

Which light when falling on a metal will emit photo electrons

When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters

A wire of resistance 10Ω is elongated by 10%. The resistance of the elongated wire is

The coil of a dynamo is rotating in a magnetic field. The developed induced e.m.f. changes and the number of magnetic lines of force also changes. The phenomenon can be correctly described as

The current flowing in a coil of self inductance 0.4 mH is increased by 250 mA in 0.1 s. The e.m.f. induced will be

Dimensions of 1/μ₀ ∈₀, where symbols have their usual meanings, are

A light bulb and a parallel plate capacitor (including a dielectric material between the plates) are connected in series to the 60-Hz ac voltage at a wall outlet. When the dielectric material is removed from the space between the plates, does the brightness of the bulb,

Determine the potential difference V_a − V_b between the points a and b of the system of capacitors shown in figure. Given that the capacitance ratio and emf of the cell is E = 95 V

In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will be

Inside a hollow charged spherical conductor, the potential at every point

The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the distance will be

Two bodies of mass m₁ and m₂ have equal kinetic energies. If p₁ and p₂ are their respective momentum, then ratio p₁ : p₂ is equal to

A black body has a wavelength of λ at temperature 2000 K. Its corresponding wavelength at temperature 3000 K will be

Two bulbs of 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are connected in parallel and secondary in series will be

At the magnetic north pole of the earth, the value of the horizontal component of earth's magnetic field and angle of dip are respectively

The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 wb m^-2 and 150 Am^-1 respectively. The relative permeability of iron is (μ0 = 4π x 10⁻⁷ Henry ∕ m)

The Young's modulus of a wire of length (L) and radius (r) is Y N-m⁻². If the length is reduced to L/2 and radius to r/2, then Young's modulus for the wire will be

The motion of a rocket is based on the principle of conservation of

The basis for carbon-14 dating method is that the

The time period of a simple pendulum is 2 seconds. If length is increased by 4 times, then its period becomes

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): If velocity-time graph is a straight line parallel to time axis, then acceleration of body is zero.
Reason(R): Acceleration is equal to rate of change of velocity (constant).

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When net force is perpendicular to direction of velocity, it just changes its direction and not magnitude.
Reason (R): This results in uniform circular motion.

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A):γ-rays are not deflected by electronic and magnetic fields.
Reason(R):γ-rays have no change.

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A uniform sphere is placed on a smooth horizontal surface and a horizontal force F is applied on it at a distance h above the surface. The acceleration of centre is independent of h.
Reason(R): Acceleration depends only on force and mass.