Question # 1

Which thermometer is most suitable for recording rapidly varying temperture.

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Alcohol in glass thermometer

Thermocouple thermometer

Mercury in glass laboratory thermometer

Mercury in glass clinical thermometer

Which one of the following is not a magnetic material

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Iron

Nickel

Aluminium

Cobalt

A lubricant is usually introduced between two surfaces to decresses friction. The lubricant.

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Decreases temperture

Provides rolling friction

Prevents direct contact of the sturaces

Acts as ball bearings

Change in momentum of a body is equal to

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Force Velocity

Force Time

Mass time

Force

Gases and liquids are categorized as.

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Liquids

Gases

Fluids

Solids

A heavy and a lighter object have same momentum. The object with greater kineic energy is.

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Heavy

Lighter

Same kinetic energy

Either a or b

Which of the following physical properties is used in a mercury thermometer.

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Colour

Pressure

Volume

Electrical resistance

If a body does not change its position with respect to some fixed point, then it will be in a state of.

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Motion

Uniform motion

Rest

Variable motion

In which of the materials, particles have only vibrational motion.

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Liquids

Solid

Plasma

Gas

SI unti of pressure is.

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Newton

Pascal

Infinite

Zero

A force n 5 N is applied to a body weighing 10 N. Its accelerationin m/s2 is

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0.5

2

5

50

A data storage device is:

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Printer

Hard disk

Monitor

CPU

Boolean expression for AND operation is:

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X = A̅

X = A + B

X = A . B

X = A̅B̅

Mathematical form of Ohm's law is:

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V = IR

V = I2R

V = Qt

V = IR2

The distance of spherical mirror is called:

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Curvature

Aperture

Sphere

a,b

Power of lens is:

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q/p

1/q

1/p

1/f

The character by which lound and faint sound can be distinguished is called:

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Pitch

Quality

Loudness

Intensity

the waves have properties:

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reflection

refraction

diffraction

all of these

in a dry cell, chemical energy changes into:

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mechanical energy

electrical energy

potential energy

kinetic energy

The ration of external force applied on the spring to displacement is called:

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Hooke’s law

Constant

Spring constant

Force

A unit of electric charge, equal to the charge of 6.25x10¹⁸ electrons is:

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Electricity

Coulomb

Electric potential

Volt

The rating of a fuse wire is always expressed in:

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ampere-hours

KWh

Volts

Amperes

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

Which is an example of irreversible process.

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Explosion

Evaporation

Slow compression

A chemical explosion

the height of the geostationary satellite above the equator is.

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35000 km

36000 km

34000 km

33000 km

Time taken by light to reach from sun to earth is.

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8 min 20 sec

7 min 20 sec

9 min 20 sec

None of these

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

The periodic variations of sound between maximum and minimum loudness are called.

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Doppler's effect

reflection

Laplace correction

Beats

The amount of inertia of 10 kg hoop about the axis of rotation perpendicular to its plane having radius 5 m is

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50 kgm2

100 K gm2

150 K gm2

250 K gm2

the wavelength of transverse wave travelling with a speed 'v' having frequency 'f' in equal to

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f/v

Vf

V/f

f/V2

Computer Chips are made of

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carbon

Gemanium

Silicon

Sodium

A stretched string 2 m long and it has 2 hopes of stationary waves hen the wavelength is

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4 m

2 m

3 m

1 m

If current flowing through a solenoid becomes four times, then magnetic field inside becomes.

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two times

three times

four times

Half

X₁is low for low frequency Fy but Xc is.

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Zero

Low

High

Same is H

The vector sum of electric force and magnetic force is called:

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Deflecting force

Lorentz force

Newton force

Faraday's force

The minimum frequency needed to emit an electron form metal surface is called:

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Work function

Threshold frequency

Quanta frequency

All of above

If 13.6 eV energy is required to ionize the hydrogen atom, then the required energy to remove an electron from n=2 is:

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10.2 eV

0 eV

3.4 eV

6.8 eV

Which one is not a ductile material

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Lead

Steel

Copper

Wrought Iron

Binding energy per nucleon is maximum for

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Platinum

Iron

Uranium

Lead

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

In case of capacitor, the unit of reactance is

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Farad

Ohm

Newton

All of these

Self inductance of a long solenoid is given by

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None of the above

Photodiode is used for wave nature of.

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Light

Thermal radiation

Radi waves

Sound waves