Question # 1

According to Archimedes, upthrust is equal to

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Weight of displaced liquid

Volume of displaced liquid

Mass of displaced liquid

None of these

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

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Specific heat

Latent heat

Transfer of heat

Heat capacity

Sin 45 is equal to:

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Zero

0.5

0.707

1

The acceleration of a body moving the uniform velocity is.

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Uniform

Zero

Negative

Variable

Those objects that conduct electricity are:

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Conductors

Insulators

Semi conductOrs

None of these

The weight of a body is 100 N its weight on moon is :

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0.17 Kg

1.7 N

17 N

170 N

Which machine is used to find acceleration due to gravity?

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Centrifuge

Atwood machine

Hydraulic machine

Washing machine

The value of g at a height one Earth's radius above the surface of the

Earth is:

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2 g

1/2 g

1/3 g1

1/4 g

Water boils at:

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0°F

0°C

100°C

100 K

The pressure of liquid is given by

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pg V

pg A

pgh

pg

A thimble of circular scale consists of equal division.

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100

10

1000

None of these

The distance between two consecutive compressions or rarefactions in longitudinal waves is called:

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Amplitude

Wavelength

Half wavelength

1/4 wavelength

A device which has two way communication is:

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Television

Radio

Hard disk

Mobile phone.

The sound waves are the example of:

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Longitudinal waves

Transverse waves

Electromagnetic waves

x-rays

If we double the distance between two charges, then force becomes:

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4-times

¼ th

Double

Half

The property of substance, which opposes the flow of current through it is called.

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Resistance

Reactance

Resistivity

None of these

Which instrument measures the potential difference:

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Voltmeter

Barometer

Galvanometer

Ammeter

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

A normal eye can see near objects clearly at a distance of:

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20 cm

25 cm

30 cm

35 cm

The unit of intensity of sound:

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wm^-1

wm

wm^-2

wm^-3

In totally reflecting prism one angle is of 90^o, and other two angles are of:

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30^o,30^o

45^o,90^o

45^o,45^o

40^o,40^o

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

Vector has both of its components are negative lies in

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

Newton's laws of motion were published in

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1587

1687

1787

1887

Pressure of fluid will be low where speed of fluid is.

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Low

Zero

High

Constant

An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is.

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Zero

Equal to real weight

2 mg

3 mg

The shape of trajectory of short range projectile is

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Straight line

Circle

Elliptical

Parabolic

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

Motion of projective is

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One dimensional

Two dimensional

Three dimensional

Four dimensional

When the amplitude of a wave is increase to doubled is energy.

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Remain the same

Increases 4 times

Increases by two times

Decreases by half

The ballistic missiles are used only for

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Long range

Short range

Medium range

Constant range

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

The SI unit of E is NC-1 and that of B is Na-1 m-1 then the unit of E/B is.

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ms-2

ms

ms^-1

m-1s-1

if time constant in RC series circuit is small, then capacitor is charged or discharged.

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Slowly

Rapidly

At constant rate

Intermittently

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

The circuit which compares the two voltages is.

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LDR

Sensor

Comparator

Logic gate

If the energy of photon is 10 eV and work function is 5 eV, then the a value of stopping potential will be

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50 V

2 V

5 V

15 V

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

If there is no fourth band, tolerance is shows as

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10%

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

Minority carriers in P-Types , substances are.

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Electrons

Protons

Holes

Neutrons