Question # 1

The path of electron in Rutherford atomic model according to classical theory a.

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Parabolic

Straight line

Spiral

Circular

Which of the following factor will not affect the speed of sound i a medium.

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Temperature

Pressure

Humidity

Mass

The number 0.02 x 10^-8in standard form will be written as.

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2 x 10^-10

2 x 10^-8

20 x 10^-8

20 x 10^-6

The charge on an Isolated conductor always lies.

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Within the conductor

At the centre of the conductor

On the surface of the conductor

Outside the surface of the conductor

A application of the phenomenon of polarization is in

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The scattering of light beams

Explaining the blue colour of sky

Identifying chemicals elements

Analysis of mechanical stress

Which quantity is common for systems in thermal equilibrium.

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Heat

Temperature

Momentum

Specific heat

Cs - 137 is a radioisotope used ot determine the thickness of the walls of steel pipes Cs 137 is chosen because it emits

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Radiowaves

Alpha particles

Beta particles

gama particles

A forward based p-n semiconductor diode is called.

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Photodiode

Photovoltaic cell

Amplifier

Ligh emitted diode

What is the heat required in Kilo joules when the temperature of 100 g of copper is raised thgough 20 K/. Specific heat capacity of copper is 0.4 x 10-3 kg -1 k-1

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0.4 kj

0.8 kj

400 kj

800 kj

Which of the substances is the lightest one.

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Copper

Mercury

Aluminium

Lead

Force acting on a test charge between the plates of a parallel plate capacitor is F. If one of the plates is removed teh force on the same test charge will be.

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Zero

F/2

F

2 F

Electrostatic force as compared to gravitational force is

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Zero

infinite

Very weak

Very strong

Who studied freely failing bodies using modern scientific method.

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Galileo

Issac newton

Abert Einstein

Alkundi

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

The dimensions of moment of inertia are

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[ML2]

[MLT-1]

[ML2T-1]

[ML-1T-2]

Which of the following radiations can penetrate 20 cm thick steel.

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Alpha particles

Beta particles

Gama particles

Neutrons

How much lce will melt by 50,000 J of heat.

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120 J

130 g

140 J

150 g

When ever current is drawn from a cell Its terminal potential difference and emf become

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Different

Same

Zero

Negative

Any frequency higher than the fundamental frequency of a sound is known as.

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Overtone

Beat

Acoustics

Shockwaves

The scientist who first noted that a compass needle was deflected when in the neighborhood of a current carrying wire was.

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Joseph Henry

Hans Christian Oersted

Michael Faraday

J.J. Thomson

Which of the following is a thermodynamic temperature scale.

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Celsius scale

Fahrenheit scale

Kelvin scale

Rankine scale

The speed of bodies exceeding the speed of sound is called.

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Superesonic

Ultrasonic

Infrasonic

Super fast

Which of the following is a transverse wave.

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Sound wave

Shock wave

Hair wave

Radiowave

The temperature scale based upon triple point of water was given by

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Rumford

Carnot

Kelvin

Celsius

A 10 kg rocket fragment falling towards the earth has a net downward acceleration of 5 ms -2 The net downward force acting on the fragment is

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5 N

10 N

50 N

105 N

A charged particles moving in a magnetic field experiences a resultant force.

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Proportional to its K.E.

In the direction of the field

In the direction opposite to its motion

In the direction perpendicular to both the field and its motion

Which material has the larges resistivity.

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Silver

Germinium

Amber

Sulphur

Sound wave in air are

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Longitudinal waves

Transvers waves

Electromagnetic waves

Matter waves

When a posirtron is emitted it causes.

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Mass number to increase by one

mass number to decrease by one

Atomic number to decrease by one

Atomic number to increase by one

The necessary condition for nuclear fusion is.

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High temperature and high pressure.

Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure.

In an elastic collision

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K.E. is conserved

Both K.E. and momentum are conserved

K.E. is not conserved

Only momentum is conserved

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