Question # 1

Those objects that conduct electricity are:

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Conductors

Insulators

Semi conductOrs

None of these

That force which produces an acceleration of one metre per second per second in a body of one kilogram mass is called

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1 joule

1 newton

1 watt

1 ampere

Glass and transparent polythene sheets allow radiations of wavelength to pass through them:

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Long

Medium

Short

All

A body is in equilibrium when its

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Acceleration is uniform

Speed is uniform

Speed and acceleration are uniform

Acceleration is zero

Flow of thermal energy from hot body cold body is called:

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Specific heat

Latent heat

Transfer of heat

Heat capacity

Ship and boats are designed on the principal of

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Charge

Densities

Volume

Floatation

Centripetal acceleration of a body is given by formula:

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a_c=v/r

a_c=mv²/r

a_c=v/r²

a_c=v2/r

GPS consists of __________ earth satellites.

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30

2

7

24

In Fahrenheit scale, upper refrence point is:

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32 ^oF

212 ^oF

180 ^oF

100 ^oF

According to SI-Units , internsity of light is measured in.

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meters

second

moles

candela

The unit of velocity and speed is.

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ms

ms^-2

ms^-1

ms-3

the waves have properties:

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reflection

refraction

diffraction

all of these

The force applied on the mass attached with a spring is represented by:

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F_a

F_c

F_ext

F_s

At mean position kinetic energy of the ball is:

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Minimum

Zero

Maximum

10 J

Program up gradation refers to:

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Program enhancement

Program identification

Program development

Program implementation

The base of computer operation are:

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1,2

0, 1

0, 2

1, 10

The converter of analogue to digital signal is:

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ADC

DAC

ATDC

None of these

100x10³ A= :

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10^-3 A

10^-2 A

10 A

10^-1A

The pitch of a sound is most closely related to its:

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Wave form

Period

Amplitude

Frequency

Application of electrostatic is:

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Car painting

Photocopying

Extracting of dust

All of these

An example of input device of computer is.

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Key board

Printer

Monitor

RAM

What happen to the atomic number of an element which emits one alpha particle?

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Increase by 1

Stays the same

Decrease by 2

Decrease by 1

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

The value of angular momentum is maximum when 0 is

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90^o

60^o

75^o

45^o

Beats can be heard when difference of frequency is not more than.

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8 Hz

10 Hz

4 Hz

6 Hz

Maximum number of components of a vector may be

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Infinite

One

two

three

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

The angular acceleration a =

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Velocity of sound is independent of

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Temperature

Density

Pressure

Medium

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

If the object is at 5 cm from the lens of simple microscope than its magnifying power will be.

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5

10

15

25

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

Which one has greater cone of impurity among all:

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Emitter

Base

Collector

All are pure

Minimum number of semi conductor diodes required for full wave rectification are.

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1

2

3

4

The impurity in the germinium is usually in the ratio of

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1:10⁶

1:10⁴

1:10⁸

1:10¹⁰

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

The sensitivity of galvanometer directly depends upon

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Magnetic field

Area of coil

Both a and b

None of a, b, c

The permeability of free space is measured in

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wb A/m

Am/wb

wb/Am

m/wbA

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

Using relativistic effects the location of an air craft after an hour fight can be predicated about

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20 m

50 m

760 m

780 m

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66

Frequency of x-rays depends upon.

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Number of electrons striking target

Accelerating potencial

Nature of the target

Both B and C