Question # 1

During the projectile motion, the horizontal component of velocity

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changes with time

remains constant

becomes zero

decreases with time

At higher frequency of the alternating current, the capacitive reactance X_c

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Increases

Decreases

Remains the same

Increases only when the voltage increases

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

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Is associated with coil P

Is associated with coil S

Causes and induced current in coil S

All of these

None of these

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

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0.5 J

2 J

0.25 J

1 J

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

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-2 mv

Zero

2 mv

mv

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

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Disc, sphere

sphere, hoop

Thin rod, hoop

Hoop,disc

The consumption source if energy is:

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Energy from blomass

Hydroelectric energy

Geothermal energy

None of these

A body walks to his school at a distance of 6 km with a speed of 2.5 km/h and walks back with a constant speed of 5 km/h. His average speed for round trip expressed in km/h is

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24/13

10/3

3

4,8

Swimming becomes possible because of______law of motion.

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First

Second

Third

None of these

Under normal circumstances, the volume of blood is sufficient to keep the vessels

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flatted for all times

inflated for all times

inflated for small times

none of them

A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:

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1 m

5 m

10 m

15 m

When the light waves of the same frequency and amplitude travelling in the same direction superimose each other , they give rise to

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interference

diffraction

dispersion

polarization

The modulus of rigidity of a liquid is:

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Zero

1

Infinite

None of these

Young's modulus for water is

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0

2

5

9

The cross product of two perpendicular vectors has magnitude

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Maximum value

Minimum value

Zero

None of these

The central ring is bright in case of newton's ring produced by:

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Reflected light

Transmitted light

Wedged film

None of above

The horizontal component of a force at an angle 60° with it is 50N. The value of force is

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43.3 N

50 N

100 N

120 N

For interference to occur the two light waves should be:

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Of two different frequencies

Coming from opposite directions

Of high intensity

Monochromatic

How are X-rays diffracted by crystals in X-rays crystallography?

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they bounce off the nucleus

they are diffracted whey they pass from between them acting as a slit

they are diffracted by the electron clouds in the atoms

they hit the side the nucleus and change direction and thus are diffracted

The projectile is the motion which is

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One dimensional

Two dimensional

Three dimensional

None of these

A bullet train move with the velocity of

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400 Kmh^-1

460 Kmh^-1

500 Kmh^-1

510 Kmh^-1

KWm^-2is the unit of

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Power

Energy

Intensity

Energy per unit area

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