Question # 1

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

The instrument which detects the instant as which the external pressure becomes equal to the systolic pressure is called.

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Manometer

Sphygmomanometer

Barometer

Stethoscope

When the projectile reaches the highest point of trajectory, the vertical component of velocity becomes.

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Small

Zero

Maximum

Vi cos

The moment of inertia is analogue to

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Mass

Weight

Torque

Force

If a body of mass 5 kg is raised vertically through a distance of 1 m, then work done is.

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49 J

4.9 J

490 J

0.49 J

In S.H.M, the acceleration of the body is directly proportional to

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Weight of body

Applied force

Amplitude

Displacement

Increase in speed of sound for 1 ^oC rise in temperature is.

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0.61 ms-1

0.61 cms-1

61 ms-1

6.1 ms-1

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

When a body is whirled in a horizontal circle by means of string, the centripetal force is supplied by

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Mass of body

Velocity of a body

Tension in the string

Centripetal acceleration

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

The SI units of flow rate are.

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m2s-1

m3s-2

m3s-1

m2s-2

The product of rotational inertial 'I' and angular velocity ' w' is equal to.

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Torque

Linear momentum

Angular momentum

Force

2 radian = ____

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2 m

4 m

57.3 m

114.6 m

The frequency of waves produced in microwave oven is

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1435 Hz

2450 MHz

1860 MHz

2850 Hz

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