Question # 1

The efficiency of a diesel engine is about

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15% to 35 5

355 to 40%

45% to 655

505 to 65 %

The ration of intensity of magnetization to the magnetic force is known as.

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Parmeability

Magnetic induction

Magnetic intensity

Magnetic susceptibility

If in Young's double slit experiments the separation between two slits is halved then the fringe width

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Remains unchanged

Becomes double

Reduces to half

Becomes 3 times

At high temperature a body generally emits redactions of.

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Small wavelengths

Long wavelengths

Moderates wavelengths

Zero wavelengths

When speed of a moving body becomes double.

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Its K.E. is doubled

Its acceleration is doubled

Its P.E. is doubled

Its momentum is double

An electric lamp use energy at the rate of 46 W on a 12 V supply. How much charge passes through the lamp in 2s.

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0.15 C

0.50 C

2.0 C

8.0 C

Super conductor are used in

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Fast computer chips

Magnetic resonance imaging

Magnetic levitation trains

All of the above

A positive and a Negative charge are initially 4 cm apart When they are moved closer together so that they are now only 1 cm part the force between them is.

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4 times smaller than befor

4 times larger than before

8 times larger than before

16 times larger than before

If a body a moving with constant acceleration the velocity time graph will be a

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zig zag

Straight line

Constant value

zero value

Which one of the following instruments has the maximum resistance.

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Ammeter

Voltmeter

Micro ammeter

Milli ammeter

One rem is equal to.

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0.1 Sv

0.01 Sv

0.001 Sv

0.0001 SV

If a rope in a hand makes 10 oscillations after every 2 s. the frequency of the wave is.

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2 C s-1

5 C s-1

10 C s-1

20 C s-1

The primary purpose of using a large aperture objective in a telescope is to produce

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Brighter image

Larger image

Wider field of view

Smaller image

The first demonstration of wave nature of light was provided in 1801 by the experiment of

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HHuygen

Thomas young

Fresnel

Maxwell

What is the magnifying power of a convex lens of focal length 5 cm.

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3

5

6

20

The SI unit of modulus of elasticity us

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N m-2

N m-1

N m

N m -3

When forwarded bias is applied to a junction diode it.

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Increases the potential barrier

Decreases the potential barrier

Reduces the majority carrier current to zero

Reduces the minority carrier current to zero

On which principle the induction coil works on.

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Self induction

Ampere's rule

Mutual induction

Gauss's law

A body of mass 2 kg is suspended in a elevator by means of a spring The balance reads its weight when the elevator moves up with an acceleration of 5 m s-2 as.

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9.8 N

29. 6 N

26.5 N

30.5 N

The transfer of thermal energy between regions of matter due to a temperature gradient is called.

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Conduction

Radiation

Convection

Sublimation

Choose the one which acts as single inverter.

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Common emitter

common collector

Common base

Diode

The most abundant isotope of neon is.

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Neon -20

Neon -21

Neon -22

Both a and c

The reverse process of vector addition is called

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Negative of a vector

Subtraction of vectors

Resolution of vectors

Multiplication of vector

in the region where the field lines are parallel and equally spaced, the field is.

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Zero

Unirorm

Non uniform

Negative

If the average velocity of an object zero in some time interval, the displacement of the object for that interval will be.

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Infinite

Zero

Increasing

Decreasing

Fluid mechanics is the study of how fluid move and the other ting involved is

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Energy

Velocity

Forces

Position

Efficiency of a Carnot engine can never be 1 or 100% unless cold reservoir is at absolute temperature.

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0 K

100 K

273 K

373 K

The magnifying power of a convex lens of focal length 5 cm is

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3

5

6

20

An image formed on the film of camera is

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Real , inverted and diminshed

Virtual, inverted and diminshed

Real upright and diminished

Virtual, upright and idminshed

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

Such substance which undergo plastic deformation until they break are known as.

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Diatomic substances

Monoatomic substances

Ductile substances

Brittle substances

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