Question # 1

An Electric kettle should always be fitted with an earth connection as a protective device What is being protected by the earth connection.

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The cable connecting the kettle

The fuse in the circuit

The heating element of the kettle

The person using the kettle

when a bowl of water is take into the bottom of a well the work done is.

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Positive

Negative

Zero

Maximum

The photons emitted in inner shell transition are.

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Alpha particle

Beta particle

Gama particle

Characteristic X-rays

The pitch of sound depends on its

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Wavelength

Frequency

Wave amplitude

Harmonic content

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

x-rays cannot produce

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Photoelectron

Compton electron

Electron positron pair

All of these

Radioactive substances do not emit

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Alpha particles

Beta particles

Gama rays

Neutrons

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

The process of conversation of a photon into an electron and a position is called.

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Pair annihilations

Pair production

Photoelectric effect

Compton effect

The ratio of intensities of two sound waves is 4 : 9 what will be the ratio of their amplitudes.

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9:4

2:3

3:2

4:9

Bracket and plunk series of spectral lines lye in the

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Visible region

Ultraviolet region

Far infrared region

Infrared region

Which of the following is the cause of failure of a lens to form a sharp and district image of a white object.

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Spherical aberration

Chromatic aberration

Distortion

Astigmatism

The capacitance of a capacitor increases with a decreases in.

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Plate area

Permitivity

Plate separation

Dielectric constant

Which of the following phenomenon gives evidence of the molecular structure of mater

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Evaporation

Diffusion

Brownian movement

All of the above

The ideal thermal efficiency of a cyclic heat engine is limited by

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Friction in the engine

Amount of heat in the engine

Difference between input temperature and output temperature.

Amount of work

Planets move around the sun due to.

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Centrifugal force

Centripetal force

Gravitational pull between them

Frictional force between them

X-rays are

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Longitudinal wave

Transvers waves

Secondary waves

Fast sound waves

A fundamental equation in fluid dynamics that relates pressure to fluid speed and height is.

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Equation of continuity

Bernoulli's equation

Stoke's equation

Mass energy eqation.

The product of velocity and cross sectional are for a liquid flowing through a pipe is a measure of the.

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Rate of flow

Volume of fluid

Fluid pressure

Fluid friction

Stationary waves are produced when two identical waves are moving on the string.

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Along the same direction

Along the opposite direction

Along the perpendicular direction

Of length 1 m

What is emitted by the hot metal filament in a cathode ray tube.

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Alpha particles

Electrons

Protons

X rays

Potential of earth's surface is.

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Negative

Positive

Zero

Infinite

The cathode ray oscilloscope is used

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For viewing the wave shape of rapidly changing electric current

As voltmeter

For measuring time intervals between electricalimpulses

All of the above

The gas thermometer is taken as the primary standard because.

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Thermometers are easily reproducible

Readings can be accurately taken

No correction are necessary

It produces he thermodynamic scale

Which of the following forms of electromagnetic energy has the longest wavelength.

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Microwaves

Radio waves

Infrared waves

^{Visible light}

A bat while flying determines the location and nature of object in his way by sending.

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Infrasonic waves

Ultrasonic waves

Supersonic waves

Ultraviolet waves

Which one of the following is a neutron absorber

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Pb

Cd

Cu

Ag

Which particles have spin quantum number 1/2

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Mesons

Laptons

Hadrons

Muons

In planetary motion

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Angular speed remains constant

Angular momentum remains constant

Linear speed remains constant

Linear momentum remains constant

Which temperature is required for the fusion of two nuclides.

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10⁶ K

10⁷K

10⁸K

10 ⁹ K

A straight wire carrying current will experience a force when place in uniform magnetic field if

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The current and field are parallel

The current and field are at an angle

the current and field are parallel in opposite directions

All of the above

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