Question # 1

Who discovered a relation between electric and magnetic field.

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Hans Christian Oersted

Michelson Faraday

Lenz

Hertz

The magnetic field inside a solenoid is

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Zero

Infinite

Uniform

Non uniform

An object gain excess negative charge after being rubbed against another object which is.

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Neutral

Negatively charged

Positively charged

either a, b, or c

Supplementary units radian and steradian were established for

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Density

Viscosity

electric intensity

Geometrical quantities

In radiotherapy X-rays are used to.

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Treat cancer

Delect bone fracture

Cure heart diseasee

All of the above

What is the necessary condition for Boyle's law to hold good.

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Isothermal

Adiabatic

Isobaric

Isochoric

Which of the following quantity is zero about the centre of mass of baody.

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Mass

Acceleration

Moment

Angular momentum

A charge kept at the centre of a shell The shell has charge Q and radius R The force on the central charge due to shell is

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in the upward direction

Towards left

Towards right

Zero

What is a measure of the separation of positive and negative electrical charges in a system of charges.

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charge polarization

Electric dipole moment

Electric field

Electrostatic induction

Velocity of sound in air at a given temperature.

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Increases with increase in pressure

Decrease with increases in pressure

Is independent of pressure

Becomes quadruples

Which temperature is required for the fusion of two nuclides.

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10⁶ K

10⁷K

10⁸K

10 ⁹ K

An active component of an electronic circuit consisting of a small block of semiconducting material to which at least three electrical contacts are made is known as.

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Rectifier

Amplifier

Thermocouple

Transistor

The process in which no heat enters or leaves the system is called.

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Isdobaric

Isochoric

Isothermal

Adiabatic

At high frequency the current through a capacitor will be

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Small

Zero

Large

Infinity

A convex mirror is used to reflect light from an object placed 66 cm in front of the mirror. The focal length of the mirror is 46 cm Find the location of the image.

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23 cm

-23 cm

-27 cm

27 cm

Two vectors of magnitudes 5 N and 7 N respectively are acting on a body if the angle between them is a right angle, their resultant vector will be.

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2 N

4 N

6 N

8 N

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

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Fermi

Newton

Bohr

Einstein

Special theory of relativity deals with the events in the frames of reference which move with constant.

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Time interval

Acceleration

Momentum

space interval

The resistance of a capacitor when it is connected with a battery is.

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Zero

Finite

Infinite

The same

It the slope of velocity time graph is increasing with time the body is said to have.

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Positive acceleration

Average acceleeration

Uniform acceleration

Retardation

A Spectrum of radiation in which the quantity being studied, such as frequency or energy takes on discrete values is called.

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Continuous spectra

Band spectra

Discrete spectra

Normal spectrum

When a platinum wire is heated of 1600^oC, it becomes

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orange

Cherry red

Dull red

White

Which one of the following quantities is conserved in a nuclear reactor.

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Energy only

Mass only

Momentum only

Mass energy and momentum

A vacuum diode conducts when plate

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Is negative w.r.t cathode

Is positive w.r.t. cathode

and cathode are at the same potential

Resistance is less

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

Density of blood a

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Equal to water

Greater than water

Less than water

zero

What is generated when air moves an air foil.

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Thrust

Lift

Drag

Turbulence

Which circuit elements has two stable states and can be used to store information.

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Flip flop or latch

Logic gate

Oscillator

Amplifier

If two non zero vectors are perpendicular to each other then their scalar product is equal to.

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-1

1

0

Infinity

An important property of an ideal power supply is.

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Infinite internal resistance

Zero internal resistance

Large output resistance

Small output resistance

Davision and Germer got Nobel prize for their work on

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The dual nature of particles

The wave nature of particles

The corpuscular nature of particles

All of the above

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