Question # 1

The point of which the whole weight of the body acts

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zero point

Centre of mass

Centre of gravity

Equilibrium

One particle having zero mass and zero charge is.

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Positron

Electron

Neutrino

Neutron

Which material has the larges resistivity.

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Silver

Germinium

Amber

Sulphur

If a vehicle is to gain momentum it must

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Lose weight

Move slowly

Lose inertia

Accelerate

Who introduced the concept that an atom posses quantized energy levels.

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Raman

Bohr

Newton

Fermi

Which of the following is required for maintaining sustained chain reaction.

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Neutrons

Protons

Electrons

Photons

At absolute zero of temperature.

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The molecular energy is zero

Molecules have translational K.E

Molecules have rotational K.E.

Molecules have maximum energy

The band width of an audio amplifier is.

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10 Hz to 10 kHz

20 Hz to 54 Hz

20 Hz to 20 kHz

20 Hz to 60 kHz

The pitch of sound depends on its

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Wavelength

Frequency

Wave amplitude

Harmonic content

The path of a projectile is a

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Straight line

Circle

Ellipse

Parabola

Oscillatory motion is always under

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An applied force

Restoring force and inertia

A periodic force

A gravitational force

Which term is used for the persistence of sound in a hall.

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Resonance

Acoustics

Symphony

Reverberation

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

Plane polarized light can be produce dby

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Simple reflection

Double refrraction

Scattering of light

All of these

Which of the following is more viscous

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Air

Honey

Water

Milk

The phenomenon in which a charging current in one coil induces an emf in another coil is called.

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Induced current

Induced emf

Self induction

Mutual induction

The rate of which blood is delivered to the patient in a transfusion depends on

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Hight of the blood level in the suspended container

Volume of the container

Shape of the container

Material of the container

A uniform vertical wire is stretched by hanging a mass from its lower end Which of the following does ot effect the strain in the wire.

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The stress

The upstretched length

The load applied

the Young's modulus of the metal

Monochromatic ight is of single.

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Frequency

Wave length

Amplitude

Pitch

Light wave can be polarized because they

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Are transverse in nature

Can be reflected

Have short wavelength

Have high frequncies

When the lift is moving upward with an acceleration then weight of the object will be.

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w = ma

w - ma

w

2 w

The change in entropy for any reversible cycle is identically

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Infinite

Positive

Negative

Zero

Plane polarized light can be produced by

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Reflection

Refraction

Scattering of light

All of these

The ration of Universal gas constant and Avogadro's number is called.

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Equilibrium constant

Velocity constant

Boitzmann's constant

Gravitational constant

Spherical aberration can be removed by using

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Concave lens

Convex lens

By limiting the number of rays using a stopper

By using a concave convex lens

Transistor are made from

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Plastics

Metals

Insulators

Doped semiconductors

The mains frequency in Pakistan is

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20 Hz

50 Hz

40 Hz

60 Hz

the wavelength of continuous X-rays is inversely proportional to.

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Intensity of incident electron beam

Temperature of the target

Intensity of X-rays

The energy of electrons striking the target

Which of the following has maximum specific heat.

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Glass

Iron

Brass

Lead

If the number of coulombs per second through a wire of 10 Ohm resistance across a 120 V line is 12, the current is

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5 A

10 A

12 A

15 A

a body floats in liquid contained in a beaker The whole system falls freely under gravity The outthrust on the body due to liquids is

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Zero

Equal to the weight of the body in air

Equal to the weight of the liquid displaced

Equal to the weight of the immersed portion of the body

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