Question # 1

The charge carriers in gases are

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electrons

ions

protons

ions and electrons

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

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1

0.2

2

0.1

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

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Positive

Negative

Zero

None of these

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

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2 cm/s

20 cm/s

200 cm/s

2000 cm/s

The example of irreversible process is

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slowly liquification

slowly evaporation

an explosion

all of them

Three quarks make:

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An electron

A meson

A baryon

A photon

None of these

The value of current gain of n-p-n transistor is of the order of

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tens

hundreds

thousands

ten thousands

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

In RLC series circuit, resonance occurs when

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X_{L > Xc}

X_{L < Xc}

X_{L = Xc}

None of these

Average value of A.C voltage during one cycle is

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1

Zero

Maximum

Variable

The conventional current is the name given to current due to flow of

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Positrons

Positive charges

Negative charges

Both A and C

None of these

The positive charge moving in one direction is equivalent in all external affects to a:

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Negative charge is moving in the same direction

Positive charge is moving in the opposite direction

Negative charge moving in the opposite direction

Positive charges moving in the same direction

None of these

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

In all natural processes where heat flows from one system to another, there is always a net

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decrease in entropy

increase in entropy

decrease or increase in entropy

none of them

Distance covered during one vibration of an oscillating body in terms of amplitude A is:

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A

2 A

3 A

4 A

The phase at the positive peak is

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Π/2

Π

3Π/2

2Π

The analysis of fluid motion becomes simplified by using

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law of conservation

law of conservation of energy

both of them

none of them

In a container having water filled up to a height h, a hole is made in the bottom. The velocity of water flowing out of the hole is

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Independent of h

Proportional to h^1/2

Proportional to h

Proportional to h²

The center of mass of a sphere lies at:

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The axis of the sphere

Circumference of sphere

Center of the sphere

None of them

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

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A - Z

A

Z

A + Z

The peak voltage in a 220 volt A.C. supply is nearly

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220 volt

253 volt

.311 volt

440 volt

The current through a metallic conductor is due to the motion of

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protons

neutrons

electrons

free electrons

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

The waves produced in a microwave oven have frequency

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2450 Hz

2450 K Hz

2450 M Hz

2450 G Hz

In the doping process, the ratio of the doping atoms to the semi conductor atom is

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1 to 10

1 to 10³

1 to 10⁶

1 to 10⁹

Stock's law holds for:

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Motion through free space

Motion through viscous medium

Bodies of all shapes

None of these

Change in momentum is one second called.

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Impulse

Force

Energy

Work

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

The SI unit of spring constant is identical with that of:

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Force

Surface tension

Pressure

Loudness

For multiplication and division purposes, percentage uncertainties are:

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Add

subtracted

Multiplied

Divided

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