Question # 1

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

The focal length of convex lens

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Negative

Positive

small

Large

Force acting on the piston to move outward is.

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Compressive stoke

Power stoke

All stoke

Exhaust stoke

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

1 torr in Nm-2 is expressed as.

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130.5 Nm-2

133.3 N m-2

140.2 Nm-2

135.2 Nm-2

The Detector in Photo phone is made up of.

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Cadmium

Germanium

Selenium

Silicon

Which phenomenon of light proves that light waves are transverse in nature.

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Refraction

Reflection

Diffraction

Polarization

73.650 rounded off upto one decimal is

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73.6

74.00

73.7

73.65

Heat is form of.

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Power

Momentum

Energy

Torque

The trajectory of a projectile is.

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Circle

Parabola

Hyperbola

Straight line

[LT-2] is demensional formula for

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Acceleration

Velocity

Force

Momentum

Blood has density equal to that of

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Mercury

Sodium

Honey

Water

An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is.

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Zero

Equal to real weight

2 mg

3 mg

The wavelength of wave produced by microwave oven is.

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12 cm

12 m

18 m

18 cm

Image formed by a concave lens is

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Real

Virtual

Erect

None of these

When water falls from tap, its cross sectional area decrease due to.

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Decrease of speed

Increase of speed

Air pressure

Gravity increase

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