Question # 1

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 kg

3 kg

4 kg

8 kg

Viscosity is defined as

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the friction between fluid and its container's walls

the internal friction between two layers of fluid

the resistance to flow a fluid experiences

the extent to which outside factors effect the fluid's flow

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

In half wave rectification

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both halves of the input voltage is used

only one half of the input voltage is used

either of these

none of these

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

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60°

90°

30°

0°

When a body is performing S.H.M., its acceleration is

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inversely proportional to the displacement

directly proportional to the applied force

directly proportional to the amplitude

directly proportional to the displacement but in opposite direction

According to the second law, which is must to produce work

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a source contains a large amount of heat energy

two sources at the same temperature

two sources at the different temperatures

a source contains a small amount of energy

Centripetal acceleration is also called ________ acceleration

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Tangential

Radial

Angular

None of these

When two progressive waves of nearly same frequencies superimpose and give rise to beats, then

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Frequency of beat changes with time

Frequency of beat changes with location of observer

All particles of medium vibrate simple harmonically with frequency equal to the difference between frequencies of component waves

Amplitude of vibration of particles at any point changes simple harmonically with frequency equal to difference between two component waves

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

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108 g

10.8 g

0.8 g

108/0.8 g

When a stress changes length, it is called the

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compressional stress

tensile stress

shear stress

any one of them

The S.I. unit of stress is also

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Force

Pascal

Momentum

None of these

Trajectory of projectile is

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Ellipse

Hyperbola

Parabola

None of these

The low blood pressure is

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70 - 80 torr

75 - 80 torr

78 - 809 torr

79 - 80 torr

Commercial polarizing material is

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Colour glass

Infra red glass

Polaroid glass

None of these

Source of light used in the fibre optic communication

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Led

Laser

Photo diode

Both a and b

A particle of mass 0.5 g moving along x-axis is located at x₁= 15 m at t₁=5 s and x₂=33 m at t₂=13 s. Its average velocity is

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6 m s^-1

2.45 m s^-1

2.25 m s^-1

4.45 m s^-1

Work is defined as the dot product force and displacement which is a

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Scalar quantity

Vector quantity

Constant quantity

None of these

A typical collector which absorbs energy directly from solar radiation upto about

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40 ^oC

70 ^oC

80 ^oC

90 ^oC

Distance to nearest galaxy from earth is

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10¹⁰m

10¹⁵m

10⁴⁰m

10³⁰m

How many fringes will pass a reference point if the moveable mirror of a Michelson s interferometer is moved 0.06 mm The wavelength of light used is 5.89 x10^-3 mm

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200

300

20.4

2.3

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