Question # 1

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

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Smaller

Lerger

Same

Much larger

None of these

The shortest distance between two points directed from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

Blood pressure is measured in torr. Which of the following units could belong to torr?

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N m^-1

N m^-2

N m

N^-1m^-2

The value of threshold frequency for different metals is

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different

same

may be different or may be same

none of these

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic field

Constant electric field

None of these

If the volume of the gas is to be increased by 4 times, then

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Temperature and pressure must be doubled

At constant P the temperature must be increased by 4 times

At constant T the pressure must be increased by four times

It cannot be increased

Area under the force displacement graph gives

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Power

Work

Heat

Energy

The law of electromagnetic induction is related to:

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Coulomb

Ampere

Faraday

Lenz

None of these

The disorder in the system increases due to the

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removal of heat

addition of heat

removal or addition of heat

none of them

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

The instantaneous acceleration of a body moving with constant speed in a circle:

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Remains constant

Is called centripetal acceleration

Tangential acceleration

None of these

One torr is equal to

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13.33 N/m²

760 N/m²

760 mm Hg

133.3 N/m²

The ratio of shearing stress/shearing strain is called as

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Modulus

Pascal modulus

Hooker's modulus

Shear modulus

F = I(L x B) is a

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vector

scalar

unit vector

none of these

A changing magnetic flux creates around itself

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An electromotive force

An electric field (changing electric flux)

Magnetic field

None of the above

Machine parts are jammed due to:

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Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

A typical rocket ejects the burnt gases at speeds over

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400 ms^-1

40000m s^-1

40000 ms^-1

60000 ms^-1

Pressure may be define as _______ per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

When quarter of a circle is completed, phase of vibration is:

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90°

180°

45°

360°

To hear a clear echo, the reflecting surface must be at a minimum distance of

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10 m

16.5 m

33 m

66 m

While deriving the equation for pressure of a gas we consider the

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rotational motion of molecules

vibrational motion of molecules

linear motion of molecules

all of them

The time required to complete on vibration is called

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frequency

total time

time period

velocity

Significant figures in 0.0010 are:

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Four

Three

Two

One

Internal friction of fluid is called

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Surface tension

Viscosity

Resistance

Cohesive force

Computer chips are made from:

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Iron

Silicon

Helium

Stontium

Aluminium

In case of two identical charges placed certain distance apart, the electric field lines are:

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Straight lines

Sine curves

Curved

Both (A) and (B)

None of these

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

The highest value reached by voltage or current in one cycle is called

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root means square value

peak value

peak to peak value

instantaneous value

The vertical and horizontal range will be equal id angle of projection is

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76°

45°

60°

120°

The unit of spring constant is:

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J-sec

Metre

Nm^-1

None of these

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