Question # 1

If r = 5 m and f = 4 N are along same direction, them torque is

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20 Nm

5 Nm

10 Nm

Zero

A man of 5000 kg moves with an acceralation of 1 ms-2 force acting on it is.

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5 N

500 N

50 N

5000 N

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

The device used to study the spectra from different sources of light is

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Telescope

Optical fibre

Spectrometer

Microscope

The Carnot cycle can be shown by which graph

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P - T graph

P - V Graph

V- T graph

PV -T graph

A ball is thrown up with 20 ms-1 at an angle of 60 ^owith x-axis , the velocity of the ball at the top position is.

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0 ms-1

10 ms-1

20 ms-1

16 ms-1

A heat engine operates between the temperature 1000 K and 400 K, Its efficiency is.

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100%

70%

60%

50%

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

The trajectory of a projectile is.

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Circle

Parabola

Hyperbola

Straight line

10 N and 20 N are acting on a body of mass 2 kg the minimum acceleration will be.

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10 ms-2

20 ms-2

60 ms-2

5 ms-2

In stationary waves, the particle velocity at nodes is

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Minimum

Maximum

Zero

Constant

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

The value of a time period of allow flying satellite is

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1 year

84 minutes

28 hours

1 day

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

The final image seen through ey piece in telescope is.

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Real, enlarge and inverted

Vertual, enlarge and erect

Virtual, enlarge and inverted

In Real, enlarge and erect

The frequency of waves produced in microwave oven is

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1435 Hz

2450 MHz

1860 MHz

2850 Hz

The Detector in Photo phone is made up of.

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Cadmium

Germanium

Selenium

Silicon

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