Question # 1

What is the effect of electric and magnetic fields on X-rays

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X-rays are deflected

X-rays are not deflected

X-rays are sometimes deflected and sometimes not

Nothing can be said

The reluctance of a body to start moving is called.

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Mass

Weight

Force

Inertia

Which instrument measures the magnification of a telescope.

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lactometer

dynamometer

Wattmeter

Ammeter

Radioactive substances do not emit

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Alpha particles

Beta particles

Gama rays

Neutrons

The electric bulb does not obey Ohm's law because.

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Current changes

Resistance changes

Heat is produced

All of these

Who first discovered a similarity in nature of x rays and light rays.

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Roentgen

Bragg

Man Von Lave

Moseley

To final image produced by a compound microscope is.

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Real and inverted

Real and erect

Virtual and erect

Virtual and inverted

Resonance phenomenon in a vibrating body

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May increase the amplitude

May decrease the amplitude

May not affected the amplitude

All of the above

If a force of 10 N makes an angle of 30 ^o with x-axis its component is given by

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1.866 N

8.66 N

0.89 N

0.866 N

The shape of wave front depends on

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Density of medium

Shape of medium

Viscosity of medium

Length of medium

The cross product of two vectors is magnitude when

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Vectors are parallel

Vectors are antiparallel

Vectors are perpendicular

They are rotated through 270^o

What are the dimensions of coefficient of velocity of

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[MLT-1]

[ML-1T-1]

[ML-2T-1]

[MLT-2]

Thermal conduction in metals differs from thermal conduction in insulators,. The reasons for this is that , in metals heat can be transported by.

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Electrons

Lattice vibrations

Photons

Positive ions

A body of mass 2 kg is suspended from the celling of an elevator moving up with an acceleration 'g' its apparent weight in the elevator will be.

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9.88 N

19.8 N

29.4 N

39. 2 N

An emitter follower has

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High input impedance and high output impedance

High input impedance and low output impedance

Low input impedance and low output impedance

Low input impedance and high output impedance

The unit generally used for measuring astronomical distances is.

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Parsecs

Light year

Metre

Kilometer

In rotational motion the quantity which plays the same role as the inertial mass in rectilinear motion.

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Angular momentum

Linear momentum

Moment of inertia

Torque

With increase in temperature the electrical conductivity of intrinsic conductors.

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Increases

Descreases

Remain unaffected

First increases then decreases

Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P.

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0.02

0.25

0.33

0.50

When a conductor situated in a dielectric is charted the energy resides.

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Only on the dielectric

Only on medium surrounding charge

On the dielectric and medium both

Only on the type of the charge

The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.

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Nuclear stability

Radioactivity

Carbon dating

Spontaneously

The resistance of a wire does not depend upon.

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Area of cross section of the wire

Length of the wire

Temperature of the wire

Current passing though the wire

The dimensions of work are

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[MLT-2]

[ML2T-2]

[ML2T-1]

[MLT-1]

The energy of neutrons obtained during a fission reaction is.

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0.1 MeV

1 KeV

1 MeV

Zero

The possible values of principal quantum number are.

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only zero

0,1,2,...................7

1,2,3........................8

2,3,4,6...............10

Which of the following gases has the maximum rms speed at STP.

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O2

H2

N2

CO2

The Pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

Which of the following remains unaffected in a magnetic field.

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a particles

b partciles

gama particles

Electrons

The wavelength of Lyman series for hydrogen spectrum lies in the.

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Visible region

Ultraviolet region

Infrared region

Far infrared region

The actual gas can behave like an ideal gas at

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Low density and high pressure

High density and high pressure

Low density and low pressure

High density and low pressure

The unit of intensity level is.

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Watt

Joule

Bel

Sabin

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