Test: Physics Mock Test - 7

Question 1

In a LCR-circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to

Accepted Answer

Answer

Answer

Answer

Question 2

In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy E₀ and the radius r₀ of the first orbit will be (a₀ is the Bohr radius)

Accepted Answer

E₀ = -27.2 eV; r₀ = a₀/2

Answer

E₀ = -27.2 eV; r₀ = a₀

Answer

E₀ = -13.6 eV; r₀ = a₀/2

Answer

E₀ = -13.6 eV; r₀ = a₀

Question 3

Which of the following is a correct statement?

Accepted Answer

beta rays are same as cathode rays

Answer

gamma rays are high energy neutrons

Answer

α-particles are single ionized helium atoms

Answer

protons and neturons have exactly the same mass

Question 4

A bomb travelling in a parabolic path under the effect of gravity explodes in mid air. The centre of mass of fragments will

Accepted Answer

Move in the parabolic path the unexploded bomb would have travelled

Answer

Move vertically upwards and then vertically downwards

Answer

Move vertically upwards

Answer

Move in an irregular path

Question 5

A heating coil is labelled as 100 W and 220 V. The coil is cut into two equal pieces, then joined in parallel to the same source. Now power of the heating coil will become

Accepted Answer

Answer

Answer

Answer

Question 6

A small body, attached by a string to a fixed point, describes a horizontal circle with uniform angular speed.  Then its distance below the fixed point depends—

Accepted Answer

On the angular velocity but not on the length of the string

Answer

Not on the angular velocity but on the length of the string

Answer

On both the angular velocity and length of the string

Answer

Neither on the angular velocity nor on the length of the string

Question 7

A body 'A' experiences perfectly elastic collision with a stationary body 'B' . If after collision the bodies fly apart in the opposite directions with equal velocities, the mass ratio of 'A' and 'B' is

Accepted Answer

Answer

Answer

Answer

Question 8

A strip of copper and another of germanium are colled from room temperature to 80 K. The resistance of

Accepted Answer

Copper strip decreases and that of germanium increases

Answer

Each of these increases

Answer

Each of these decreases

Answer

Copper strip increases and that of germanimum decreases

Question 9

The working of a dynamo is based on principle of

Accepted Answer

Electromagnetic induction

Answer

Conversion of energy into electricity

Answer

Magnetic effects of current

Answer

Heat effects of current

Question 10

A step-up transformer has transformation ratio of 3:2 What is the voltage in secondary, if voltage in primary is 30 V ?

Accepted Answer

Answer

Answer

Answer

Question 11

A condenser stores

Accepted Answer

<h5>                                  Charge                               </h5>

Answer

<h5>                                  Potential                               </h5>

Answer

<h5>                                  Current                               </h5>

Answer

Question 12

Radius of the earth is 6400 km. The radius of the orbit of a stationary satellite is about

Accepted Answer

Answer

Answer

Answer

<h5>infinity</h5>

Question 13

A space-craft is launched in a circular orbit very close to earth. What additional velocity should be given to the space craft so that it might escape the earth's gravitational pull ? (radius of the earth = 6400 km, g = 9.8 m/s²)

Accepted Answer

Answer

Answer

Answer

Question 14

The figure shows a charge q placed inside a cavity in an uncharged conductor. Now if an external electric field is switched on:

Accepted Answer

Only induced charge on outer surface will redistribute

Answer

Only induced charge on inner surface will redistribute

Answer

Both induced charge on outer and inner surface will redistribute.

Answer

Force on charge q placed inside cavity will charge.

Question 15

Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

Accepted Answer

Answer

Answer

Answer

none of these

Question 16

A vehicle of mass m is moving on a rough horizontal road with momentum P. If the coefficient of friction between the tyres and the road be μ, then the stopping distance is

Accepted Answer

p²/2μm²g

Answer

Answer

Answer

Question 17

Average kinetic energy of a gas molecule depends on

Accepted Answer

Absolute temperature

Answer

Volume of gas

Answer

<h5>Molar mass</h5>

Answer

Mass of the gas taken

Question 18

Two parallel wires of length 9m each are separated by a distance of 0.15m. If they carry equal currents in the same direction and exert a total force of 30 x 10 ⁻⁷ N on each other, the value of current must be

Accepted Answer

Answer

Answer

Answer

Question 19

Two liquids of densities ρ₁ and ρ₂ and coefficients of viscosity η₁ and η₂ are found to flow through a capillary tube at the same rate. The ratio of η₁/η₂ is

Accepted Answer

ρ₁/ρ₂

Answer

ρ₂/ρ₁

Answer

√ρ₁/ρ₂

Answer

(ρ₁/ρ₂)²

Question 20

A galvanometer can be changed into an ammeter by using

Accepted Answer

low resistance shunt in parallel

Answer

low resistance shunt in series

Answer

high resistance shunt in series

Answer

high resistance shunt in parallel

Question 21

The couple acting on a magnet of length 10cm placed in a uniform magnetic field of intensity 40N/wb such that the axis of the magnet makes 45^o with the field direction is √ 2 ∕ 10 Nm. The pole strength of the magnet in webers

Accepted Answer

5 x 10^{− 3}

Answer

Answer

Answer

Question 22

A cube is subjected to a uniform volumatric compression. If side of cube decreases by 1%, then its bulk strain is

Accepted Answer

Answer

Answer

Answer

Question 23

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

Accepted Answer

2100 m/sec² upwards

Answer

2100 m/sec² downwards

Answer

1400 m/sec²

Answer

700 m/sec²

Question 24

At the uppermost point of a projectile, angle between the directions of its velocity and acceleration is

Accepted Answer

Answer

Answer

Answer

Question 25

The velocity of a body at time t = 0 is 10√2 m/s in the north-east direction and it is moving with an acceleration of 2 m/s² directed towards the south. The magnitude and towards the south. The magnitude and direction of the velocity of the body after 5 sec will be

Accepted Answer

10 m/s, towards east

Answer

10 m/s, towards north

Answer

10 m/s, towards south

Answer

10 m/s, towards north-east

Question 26

A body of mass 2 kg is moving with a velocity 8 m/s on a smooth surface. If it is to be brought to rest in 4 seconds, then force to be applied is

Accepted Answer

Answer

Answer

Answer

Question 27

Moment of inertia of a thin circular disc of mass M and radius R about any diameter is

Accepted Answer

Answer

Answer

Answer

Question 28

In a camera, f-number represents

Accepted Answer

size of the aperture

Answer

time of exposure

Answer

depth of focus

Answer

focal length of the lens

Question 29

A pendulum after some time becomes slow in motion and finally stops due to

Accepted Answer

air friction

Answer

earth's gravity

Answer

mass of pendulum

Answer

all of these

Question 30

If at a height of 40 cm, the direction of motion of a projectile makes an angle π/4 with the horizontal, then its initial velocity and angle of projection are. respectively

Accepted Answer

5.0 m, 1/2 cos⁻¹(-8/25)

Answer

30 m, 1/2 cos⁻¹(-4/5)

Answer

3.0 m, 1/2 cos⁻¹(-1/2)

Answer

6.0 m, 1/2 cos⁻¹(-1/4)

NEET Test: Physics Mock Test - 7 Free Online Test 2026

Full Mock Test & Solutions: Test: Physics Mock Test - 7 (45 Questions)

In a LCR-circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to

In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy E₀ and the radius r₀ of the first orbit will be (a₀ is the Bohr radius)

Which of the following is a correct statement?

A bomb travelling in a parabolic path under the effect of gravity explodes in mid air. The centre of mass of fragments will

A heating coil is labelled as 100 W and 220 V. The coil is cut into two equal pieces, then joined in parallel to the same source. Now power of the heating coil will become

A small body, attached by a string to a fixed point, describes a horizontal circle with uniform angular speed. Then its distance below the fixed point depends—

A body 'A' experiences perfectly elastic collision with a stationary body 'B' . If after collision the bodies fly apart in the opposite directions with equal velocities, the mass ratio of 'A' and 'B' is

A strip of copper and another of germanium are colled from room temperature to 80 K. The resistance of

The working of a dynamo is based on principle of

A step-up transformer has transformation ratio of 3:2 What is the voltage in secondary, if voltage in primary is 30 V ?

A condenser stores

Radius of the earth is 6400 km. The radius of the orbit of a stationary satellite is about

A space-craft is launched in a circular orbit very close to earth. What additional velocity should be given to the space craft so that it might escape the earth's gravitational pull ? (radius of the earth = 6400 km, g = 9.8 m/s²)

The figure shows a charge q placed inside a cavity in an uncharged conductor. Now if an external electric field is switched on:

Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

A vehicle of mass m is moving on a rough horizontal road with momentum P. If the coefficient of friction between the tyres and the road be μ, then the stopping distance is

Average kinetic energy of a gas molecule depends on

Two parallel wires of length 9m each are separated by a distance of 0.15m. If they carry equal currents in the same direction and exert a total force of 30 x 10 ⁻⁷ N on each other, the value of current must be

Two liquids of densities ρ₁ and ρ₂ and coefficients of viscosity η₁ and η₂ are found to flow through a capillary tube at the same rate. The ratio of η₁/η₂ is

A galvanometer can be changed into an ammeter by using

The couple acting on a magnet of length 10cm placed in a uniform magnetic field of intensity 40N/wb such that the axis of the magnet makes 45^o with the field direction is √ 2 ∕ 10 Nm. The pole strength of the magnet in webers

A cube is subjected to a uniform volumatric compression. If side of cube decreases by 1%, then its bulk strain is

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

At the uppermost point of a projectile, angle between the directions of its velocity and acceleration is

The velocity of a body at time t = 0 is 10√2 m/s in the north-east direction and it is moving with an acceleration of 2 m/s² directed towards the south. The magnitude and towards the south. The magnitude and direction of the velocity of the body after 5 sec will be

A body of mass 2 kg is moving with a velocity 8 m/s on a smooth surface. If it is to be brought to rest in 4 seconds, then force to be applied is

Moment of inertia of a thin circular disc of mass M and radius R about any diameter is

In a camera, f-number represents

A pendulum after some time becomes slow in motion and finally stops due to

If at a height of 40 cm, the direction of motion of a projectile makes an angle π/4 with the horizontal, then its initial velocity and angle of projection are. respectively

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NEET Test: Physics Mock Test - 7 Free Online Test 2026

Full Mock Test & Solutions: Test: Physics Mock Test - 7 (45 Questions)

In a LCR-circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from L to

In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy E₀ and the radius r₀ of the first orbit will be (a₀ is the Bohr radius)

Which of the following is a correct statement?

A bomb travelling in a parabolic path under the effect of gravity explodes in mid air. The centre of mass of fragments will

A heating coil is labelled as 100 W and 220 V. The coil is cut into two equal pieces, then joined in parallel to the same source. Now power of the heating coil will become

A small body, attached by a string to a fixed point, describes a horizontal circle with uniform angular speed. Then its distance below the fixed point depends—

A body 'A' experiences perfectly elastic collision with a stationary body 'B' . If after collision the bodies fly apart in the opposite directions with equal velocities, the mass ratio of 'A' and 'B' is

A strip of copper and another of germanium are colled from room temperature to 80 K. The resistance of

The working of a dynamo is based on principle of

A step-up transformer has transformation ratio of 3:2 What is the voltage in secondary, if voltage in primary is 30 V ?

A condenser stores

Radius of the earth is 6400 km. The radius of the orbit of a stationary satellite is about

A space-craft is launched in a circular orbit very close to earth. What additional velocity should be given to the space craft so that it might escape the earth's gravitational pull ? (radius of the earth = 6400 km, g = 9.8 m/s2)

The figure shows a charge q placed inside a cavity in an uncharged conductor. Now if an external electric field is switched on:

Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

A vehicle of mass m is moving on a rough horizontal road with momentum P. If the coefficient of friction between the tyres and the road be μ, then the stopping distance is

Average kinetic energy of a gas molecule depends on

Two parallel wires of length 9m each are separated by a distance of 0.15m. If they carry equal currents in the same direction and exert a total force of 30 x 10 −7 N on each other, the value of current must be

Two liquids of densities ρ₁ and ρ₂ and coefficients of viscosity η₁ and η₂ are found to flow through a capillary tube at the same rate. The ratio of η₁/η₂ is

A galvanometer can be changed into an ammeter by using

The couple acting on a magnet of length 10cm placed in a uniform magnetic field of intensity 40N/wb such that the axis of the magnet makes 45o with the field direction is √ 2 ∕ 10 Nm. The pole strength of the magnet in webers

A cube is subjected to a uniform volumatric compression. If side of cube decreases by 1%, then its bulk strain is

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is

At the uppermost point of a projectile, angle between the directions of its velocity and acceleration is

The velocity of a body at time t = 0 is 10√2 m/s in the north-east direction and it is moving with an acceleration of 2 m/s2 directed towards the south. The magnitude and towards the south. The magnitude and direction of the velocity of the body after 5 sec will be

A body of mass 2 kg is moving with a velocity 8 m/s on a smooth surface. If it is to be brought to rest in 4 seconds, then force to be applied is

Moment of inertia of a thin circular disc of mass M and radius R about any diameter is

In a camera, f-number represents

A pendulum after some time becomes slow in motion and finally stops due to

If at a height of 40 cm, the direction of motion of a projectile makes an angle π/4 with the horizontal, then its initial velocity and angle of projection are. respectively

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A space-craft is launched in a circular orbit very close to earth. What additional velocity should be given to the space craft so that it might escape the earth's gravitational pull ? (radius of the earth = 6400 km, g = 9.8 m/s²)

Two parallel wires of length 9m each are separated by a distance of 0.15m. If they carry equal currents in the same direction and exert a total force of 30 x 10 ⁻⁷ N on each other, the value of current must be

The couple acting on a magnet of length 10cm placed in a uniform magnetic field of intensity 40N/wb such that the axis of the magnet makes 45^o with the field direction is √ 2 ∕ 10 Nm. The pole strength of the magnet in webers

The velocity of a body at time t = 0 is 10√2 m/s in the north-east direction and it is moving with an acceleration of 2 m/s² directed towards the south. The magnitude and towards the south. The magnitude and direction of the velocity of the body after 5 sec will be