Question # 1

Metre is the basics unit of

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Mass

Force

Velocity

Length

Work is negative when angle between F and d is

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45^o

₀^o

90^o

180^o

If a body is moving in the counter clockwise direction the direction of angular velocity will be

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Toward the centre

Away from the centre

along the linear velocity

Perpendicular to both radius and linear velocity

Fringe spacing in Young's double slit experiment increases due to increase in.

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Slit separation

Wave length

Order of Fringe

Frequency of source

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

The resultant of two forces 30 N and 40 N acting parallel to each other is.

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30 N

40 N

70 N

10 N

The to and fro motion of a body is called

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Linear motion

Rotational motion

Vibratory motion

None of these

The value of angular momentum is maximum when 0 is

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90^o

60^o

75^o

45^o

If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is.

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1m

2 m

3 m

4 m

The direction of angular acceleration is

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Along the axis of rotation

Perpendicular to the axis of rotation

Opposite to axis of rotation

None of these

A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

A phenomenon by which energy is dissipated from the oscillating system is called.

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Forced oscillation

Free oscillation

Damping

Simple harmonic motion

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

The acceleration of a projectile along x axis is.

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Zero

Increase

Decrease

Equal to 'g'

A convex lens acts as diverging lens if the object is placed at

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F

2F

Between F and 2 F

Within the F

_______ is bio fuel

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Water

Petrol

Ethanol

Oil

Time rate of change of angular displacement is called

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Linear velocity

Angular velocity

Rotational velocity

Vibrational velocity

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

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