Question # 1

The product of mass and specific heat of a substance is called.

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Latent heat

Water equivalent

Atomic heat

Heat capacity

Lenses are commonly made of.

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Glass only

Plastic only

Glass and clear plastic

Aluminium

The mains frequency in Pakistan is

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20 Hz

50 Hz

40 Hz

60 Hz

Who discovered a relation between electric and magnetic field.

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Hans Christian Oersted

Michelson Faraday

Lenz

Hertz

At what speed the mass of a body will be doubled.

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0.67 C

0.77 C

0.87 C

0.97 C

Which of the following is non renewable source of energy.

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Wind

Coal

Hydroelectric

Biomass

A voltmeter is a

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High resistance galvanometer

Low resistance galvanometer

Zero resistance galvanometer

Infinite resistance galvanometer

The surface of a liquid is somewhat similar to a stretched membrane because.

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There is an elastic stress in the surface

Tension in the surface increases if the area is increased

The surface has a natural tendency to contract

Ripples can be produced on the surface

How much large is the proton mass than the electron mass.

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1536

1636

1736

1836

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

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9.8 N

29. 6 N

26.5 N

30.5 N

The reluctance of a body to start moving is called.

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Mass

Weight

Force

Inertia

A bulb of 100 W is connected to a 160 V supply What will be the power consumed.

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25 W

30 W

50 W

64 W

Who proposed that light energy travels in space by means of wave motion.

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Maxwell

Planck

De-Broglie

Huygen

A step up transformer has a turn ratio of 1:100 A voltage of 20 V is connected across the primary coil What is the secondary voltage.

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0.2 V

5 V

100 V

2000 V

Frequency less than 120 Hz are known as

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Infrasonic

Ultra sonics

Super sonics

Infrared

Which is the best sound source to produce a pure note.

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Tuning fork

Flute

Drum

Harmonium

Power of lens is measured in

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cm

Metres

cm-1

Dioptres

The term used for heat capacity per unit mass is.

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Latent heat

Specific heat

Energy density

Specific energy

A single silicon photovoltaic cell produces a current of the order of.

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A few miliamperes

10² A

10³ A

10⁴ A

The binary equivalent of 25 is

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111001

11001

1001

10101

The phenomenon of exactly zero electrical resistance occurring in certain materials below a characteristics temperature is called.

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Resistivity

Conductivity

Super conductivity

Volume resistivity

Which particle interact via all fundamental forces.

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Leptons

Hadrons

Muons

mesons

Interference fringe spacing depends on

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The wavelength of light used

The distance screen from the coherent sources

Separation between the sources

All of the above

In a diffraction pattern, the width of any fringe is.

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Directly proportional to slit width

Inversely proportional to slit width

independent of slit width

Zero

Which of the following proves that light waves are transverse in nature.

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Diffraction

Interference

Polarization

Refraction

The fluid which is incompressible and non viscous is called.

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Viscous fluid

Nonideal fluid

Ideal fluid

Perfect fluid

What is the basic advantage of class A operation of an amplifier.

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It has high efficiency

It has high gain

It has low distortion

It has high distortion

What kind of movement is dictated by the laws of thermodynamcis.

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Energy motion

Heat work

Light heat

Energy light

The pressure necessary to liquify a gas at the critical temperature is called.

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Normal pressure

Atmospheric pressure

Critical pressure

Liquid pressure

Which of the following scientists is known for his exceptional work in the field of optics.

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Albert Einstein

Issac Newton

Ibn al Haithem

Alberuni

In the case of forced oscillations frequency of oscillation is.

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The natural damped frequency

The natural undamped frequency

The frequency of the external periodic force

Some other frequency

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