Question # 1

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

Distance covered by a freely falling body is 2 seconds will be

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9.8 m

19.6 m

44.4 m

49 m

The artificial satellites are held in orbits by

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Gravitational force

Electric force

Magnetic force

All of these

Horizontal range is maximum when the angle of projectile is.

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0 o

30 o

45 o

60 o

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

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Refraction

Reflection

Diffraction

Polarization

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

The acceleration of a projectile along x axis is.

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Zero

Increase

Decrease

Equal to 'g'

The diastolic pressure of a normal healthy person is.

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120 torr

110 torr

100 torr

75-80 torr

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

the height of the geostationary satellite above the equator is.

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35000 km

36000 km

34000 km

33000 km

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

A finite volume of gas consists of

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Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

The wave form of SHM is.

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Sine wave

Cosine wave

Tangent wave

Square wave

The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

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