Courses

# Test: Physics Mock- 4

## 45 Questions MCQ Test NEET Mock Test Series | Test: Physics Mock- 4

Description
This mock test of Test: Physics Mock- 4 for NEET helps you for every NEET entrance exam. This contains 45 Multiple Choice Questions for NEET Test: Physics Mock- 4 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Physics Mock- 4 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this Test: Physics Mock- 4 exercise for a better result in the exam. You can find other Test: Physics Mock- 4 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

### In an AC circuit, the potential difference across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference across the the circuit is

Solution: QUESTION: 2

Solution:
QUESTION: 3

### Which of the following is true for photon

Solution:
QUESTION: 4

Two particles of equal masses are revolving in circular paths of radii r₁ and r₂ respectively with the same speed. The ratio of their centripetal forces is

Solution:
QUESTION: 5
When a resistance of 2 Ω is connected across the terminals of a cell, the current is 0.5 amperes. When the resistance is increased to 5 ohm, the current is 0.25 amperes. The internal resistance of the cell is
Solution:
QUESTION: 6

The temperature co-efficient of resistance of a wire is 0.00125oC⁻1. At 300 K, its resistance is 1 Ω. At what temperature the resistance of the wire will be 2 Ω

Solution:
QUESTION: 7
In a D.C. motor induced e.m.f will be maximum
Solution:
QUESTION: 8

One end of a thin uniform rod of length L and mass M1 is rivetted to the centre of a uniform circular disc of radius 'r' and mass M2 so that both are coplanar. The centre of mass of the combination from the centre of the disc is (Assume that the point of attachment is at the origin)

Solution:
QUESTION: 9

A metallic rod of length l is placed normal to the magnetic field B and revolved in a circular path about one of the ends with angular speed ω. The potential difference across the ends will be

Solution:
QUESTION: 10
The electrostatic capacity of a capacitor depends upon its
Solution:
QUESTION: 11
A box is placed on an inclined plane and has to be pushed down. The angle of inclination is
Solution:
QUESTION: 12

A particle of mass m moving eastward with a speed ν collides with another particle of the same mass moving northward with the same speed ν. The two particles coalesce on collision. The new particle of mass 2 m will move in the north-easterly direction with a velocity

Solution:  QUESTION: 13

Three capacitors of capacitances 1 μF, 2 μF and 4 μF are connected first in a series combination, and then in a parallel combination. The ratio of their equivalent capacitances will be

Solution: QUESTION: 14

The angular speed of earth's rotation about its own axis is ω. The speed is increased to p times to make the effective acceleration due to gravity equal to zero at equator. The value of p is (Take g = 10 m-s⁻2; Radius of earth = 6400 km)

Solution:
QUESTION: 15
Which of the following statements is correct in respect of a geostationary satellite ?
Solution:
QUESTION: 16
The energy spectrum of a black body exhibits a maximum around a wavelength λ₀. The temperature of a black body is now changed such that the energy is maximum around a wavelength 0.75 λ₀. The power radiated by the black body will now increase by a factor of
Solution:
QUESTION: 17

The average kinetic energy of a gas molecules at 27oC is 6.3 x 10⁻21J. Its average kinetic energy at 227oC will be

Solution:
QUESTION: 18
Four charged particles are projected perpendicularly into the magnetic field with equal speed. Which will have minimum frequency?
Solution:
QUESTION: 19
The cyclotron frequency of an electron gyrating in a magnetic field of 1 T is
Solution:
QUESTION: 20
If the moment of a magnet is 400 C.G.S units, and the force acting on each pole in a uniform magnetic field of strength 0.32 oersted is 5.12 dynes. The distance between the poles of the magnet is equal to
Solution:
QUESTION: 21
Two pieces of a glass plate, placed one upon the other with a little water in between them, can not be separated easily, because of
Solution:
QUESTION: 22
Two wires of same radius and length are subjected to the same load. One wire is of steel and the other is of copper. If Young's modulus of steel is twice that of copper, then ratio of elastic potential energies stored per unit volume in steel wire to that in copper wire is
Solution:
QUESTION: 23
If I, α and τ are the moment of inertia, angular acceleration and torque respectively of a body rotating about any axis with angular velocity ω, then
Solution:
QUESTION: 24
A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is
Solution:
QUESTION: 25
What happen, when we multiply a vector by -2?
Solution:
QUESTION: 26

A ball is thrown upwards at an angle of 60o to the horizontal. It falls on the ground at a distance of 90 m. If the ball is thrown with the same initial velocity at an angle 30o, it will fall on the ground at a distance of

Solution:
QUESTION: 27
Newton's second law gives the measure of
Solution:
QUESTION: 28
The magnifying power of a telescope is m. If focal length of its eye lens is halved, the magnifying power will become
Solution:
QUESTION: 29
The total energy of particle performing simple harmonic motion depends on
Solution:
QUESTION: 30
In spectral radiancy curve for cavity radiation, the wave-length of the maximum spectral rediancy
Solution:
QUESTION: 31

A cricket ball is thrown up with a speed of 19.6 ms⁻1. The maximum height it can reach is

Solution:
QUESTION: 32
If the error in the measurement of radius of a sphere is 0.1%, then the error in the measurement of volume will be
Solution:
QUESTION: 33
A boat, which has a speed of 5 km/hr in still water, crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of the river water in km/hr is
Solution:
QUESTION: 34
During capillary rise of a liquid in a capillary tube, the surface of contact that remains constant is of
Solution:
QUESTION: 35
If three bulbs 60W, 100W and 200W are connected in parallel, then
Solution: Bulb of higher voltage will glow more
QUESTION: 36
A solid cylinder of mass M and radius R rolls without slipping down an inclined plane of length L and height h. What is the speed of its centre of mass when the cylinder reaches its bottom?
Solution:
QUESTION: 37

If a 30 V, 90W bulb is to be worked on a 120V line, a resistance of how many ohms should be connected in series with the bulb

Solution: QUESTION: 38

Efficiency of engine is n₁ at T₁ = 200oC and T₂ = 0oC and n₂ at T₁ = 0oC and T₂ = -200 K. Find the ratio of n₁/n₂.

Solution:
QUESTION: 39
The physical quantity which has dimensional formula as that of Energy/mass x length is
Solution:
QUESTION: 40
If R and L represent respectively resistance and self inductance, which of the following combinations has the dimensions of frequency
Solution:
QUESTION: 41
Which of the following phenomena establish the wave nature of light?
Solution:
QUESTION: 42

Two moles of monoatomic ideal gas at 60oC are mixed adiabatically with one mole of another monoatomic ideal gas at 12oC. The final temperature of the mixture is

Solution: QUESTION: 43
A plane wave is described by the equation y = 3 cos (x/4 - 10t - π/2). The maximum velocity of the particles of the medium due to this wave is
Solution:
QUESTION: 44

The P.E. function of a particle executing linear simple harmonic motion is given by V (x) = 1/2 kx2, where k, force constant of oscillator is equal to 0.5 N/m. The amplitude of particle when its total energy is 1 J is equal to

Solution:
QUESTION: 45

When a spring is stretched by a distance x, it exerts a force, given by F = (-5x - 16x3) N
The work done, when the spring is stretched from 0.1 m to 0.2 m is

Solution: