Question # 1

Which of the following relation is correct?

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F = m/a

F = m-a

F = ma

F = m + a

Specific heat of glass

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780 Jkg^-1K^-1

800 Jkg^-1K^-1

840 Jkg^-1K^-1

880 Jkg^-1K^-1

All divers need to wear seat belt because of effect of:

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Inertia

Gravity

Car force

Nil

Which of the solid does not possess the fixed shape and volume?

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Stone

Metal spoon

Pencil

Amorphous solid

Archimedes is a scientist:

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Greek

Italian

French

English

Rate of doing work is called

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Energy

Torque

Power

Momentum

The conduction is due to:

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They have high boiling point

Vibration of atoms

They have high melting point

None of above

The sum of kinetic energy and potential energy of molecules or atoms is called.

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Temperature

Internal energy

Kinetic energy

Potential energy

1 hp is equal to :

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747 W

746 W

748 W

1000 W

1 Pa is equal to

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NM

NM-1

JS

NM-2

A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?

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5 Joules

86 Joules

707 Joules

866 Joules

Which of the following characteristics of a wave is independent of the others:

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speed

frequency

amplitude

wavelength

Number of poles in a magnet is:

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One

Two

Three

Unlimited

the time period of body attached to spring depend on:

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mass

gravitational constant

length

amplitude

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

In the presence of a charged body, an insulated conductor develops positive charge at one end and negative charge at the other end, this i- called:

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Electrostatics

Electrostatic induction

Magnetism

Electromagnetic induction

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

The output of a two input NOR gate is 1 when:

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A is 1 and B is 0

A is 0 and B IS 1

Both A and B are 0

Both A and B are 1

AND gate can be formed by using two:

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NOT gates

OR gates

NOR gates

Nand gates

The symbol of atomic mass number is:

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A

X

N

Z

Electric field lines:

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always cross each other

never cross each other

cross each other inthe region of strong field

cross each other in the region of weak field

The phenomena used in capacitor is:

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electrostatic induction

induced current

electric field

electroscope

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

The accepted value for speed of light in vacuum

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2.99 x 10⁸m - sec^-1

2.99 x 10⁶m - sec^-1

2.99 x 10⁸km - sec^-1

2.99 x 10⁸m - h^-1

When two waves of same frequency travel in opposite direction, the phenomenon will be

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Diffraction

Stationary waves

Polarization

Interference

Multimode graded index fibre has a core whose diameter range lie from.

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5 to 50 micro meter

50 to 100 micro meter

40 to 1000 micro meter

50 to 10,000 micrometer

Sound waves are

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Electromagnetic waves

Transverse waves

Compressional waves

Matter waves

All point of the rigid body rotating about a fixed axis do not have same.

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Angular acceleration

Angular speed

speed

Angular displacement

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

A man of 1 kg is freefalling. The force of gravity is

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1 N

9.8 N

0.5 N

Zero

10 waves pass through a point in 2 seconds with speed 10 ms-1 the frequency of wave will be

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1 Hz

2 Hz

5 Hz

10 Hz

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

When a coil is moved in a uniform magnetic field, an induced emf is produced due of change in

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Flux density

Electric flux

Magnetic flux

Magnetic field strength

Transistor was invented by:

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Bardeen

Micheal faraday

Lenz

Newton

When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows

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0.20 C

2.5 C

5.0 C

10.0 C

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

Marie Curie and Pierre Curie discovered.

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Uranium

Uranium and Radium

Polonium and radium

Radium

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

Which of the modulus of elasticity is involved in compressing a rod to decrease its length ?

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Young's modulus

Bulk modulus

Modulus of elasticity

None of these

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid way between them is.

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1 V

2 V

Zero

V/2

If an object moves with speed of light, its mass will be.

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Zero

Maximum

Minimum

infinity

The principle regarding the dual nature of light was first discovered by

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Compton

J.J.Thomson

De-Broglie

Heisenberg