Physics

NEET Class 12

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Advertisement

Advertisement

1.

In an inelastic collision an electron excites a hydrogen atom from its ground state to a M-shell state. A second electron collides instantaneously with the excited hydrogen atom in the M-shell state and ionizes it. At least how much energy the second electron transfers to the atom in the M-shell state ?

+ 3.4 eV

+ 1.51 eV

− 3.4 eV

− 1.51 eV

2.

Given $\overrightarrow{\mathrm{A}}=2\hat{\mathrm{i}}+3\hat{\mathrm{j}}$ and $\overrightarrow{\mathrm{B}}=\hat{\mathrm{i}}+\hat{\mathrm{j}}$. The component of vector $\overrightarrow{\mathrm{A}}$ along vector $\overrightarrow{\mathrm{B}}$ is

$\frac{1}{\sqrt{2}}$

$\frac{3}{\sqrt{2}}$

$\frac{5}{\sqrt{2}}$

$\frac{7}{\sqrt{2}}$

3.

A cubical vessel of height 1 m is full of water. What is the amount of work done in pumping water out of the vessel ? (Take g = 10 m/s^{2})

1250 J

5000 J

1000 J

2500 J

4.

If a person can throw a stone to maximum height of h metre vertically, then the maximum distance through which it can be thrown horizontally by the same person is

$\frac{\mathrm{h}}{2}$

h

2h

3h

Advertisement

5.

A body of mass 6 kg is acted upon by a force which causes a displacement in it given by $\mathrm{x}=\frac{{\mathrm{t}}^{2}}{4}$metre, where t is the time in second. The work done by the force in 2 s is

12 J

9 J

6 J

3 J

6.

A box is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to

t

^{1/2}t

^{3/4}t

^{3/2}t

^{2}

7.

A particle is moving with a constant speed v in a circle. What is the magnitude of average velocity after half rotation ?

2v

$2\frac{\mathrm{v}}{\mathrm{\pi}}$

$\frac{\mathrm{v}}{2}$

$\frac{\mathrm{v}}{2\mathrm{\pi}}$

8.

A cricket ball of mass 0.25 kg with speed 10 m/s collides with a bat and returns with same speed within 0.01 s. The force acted on bat is

25 N

50 N

250 N

500 N

Advertisement

9.

If the earth were to suddenly contract to $\frac{1}{\mathrm{n}}\mathrm{th}$ of its present radius without any change in its mass, the duration of the new day will be nearly

24/n h

24 n h

24/n

^{2}h24 n

^{2}h

10.

If g is the acceleration due to gravity on the surface of the earth, the gain in potential energy of an object of mass m raised from the earth's surface to a height equal to the radius R of the earth is

$\frac{\mathrm{mgR}}{4}$

$\frac{\mathrm{mgR}}{2}$

mgR

2mgR

Advertisement

Textbook Solutions | Additional Questions