Question # 1

Resultant vector can be found by:

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θ=tan^-1 Fy/ Fx

θ=tan[Fy/ Fx ]

θ=tan^-1[ Fy/ Fj ]

None of these

Transfer of heat by actual movement of molecules form hot place to cold place is called:

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Conduction

Convection

Radiation

None

Kgms^-2 is equal to:

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Joule

Mole

Newton

Watt

The unit of velocity and speed is.

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ms

ms^-2

ms^-1

ms-3

Weight is measured by:

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Spring balnce

Measuring cylinder

Physical balnce

None of these

The unit of π is:

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N

m

s

None

The gravitational force has the ________ relation with the distance between two masses:

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Direct

Inverse

Constant

None

The speed geostationary satellite with respect to earth is:

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8.33 kms^-1

3.87 ms^-1

32 ms^-1

Zero

One horse power is equal to:

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746 W

749 W

764 W

794 W

Which of the following affects evaporation?

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Temperature

Surface area of the liquid

Wind

All of the above

In which of the following state molecules don not leave their position?

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Solid

Liquid

Gas

Plasma

The speed of sound in iron at 25°C is:

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5950 m/sec

5900 m/sec

6950 m/sec

6940 m/sec

The angle of which prism deviates the incident ray is called:

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angle of incident

angle of reflection

angle of deviation

angle of minimum deviation

Release of energy by the sun is due to

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Nuclear fission

Nuclear fusion

Burning of gases

Chemical reaction

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

In a convex mirror the size of the image:

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Is smaller than the size of the object

Is greater than the size of the object

Depends upon the position of the object

Is equal to the size of the object

Which device is used to increases / decreases A.C Voltage?

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Electric motor

Transformer

A.C Generator

Solenoid

isotopes are atom of same element with different.

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Atomic mass

Atomic number

Number of proton

Number of electron

The waves, which are used to detect the broken bones, are called:

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Light waves

x-rays

Sound waves

both b,c,

Which device is used to store charge:

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Resister

Capacitor

Dielectric

Fuse

The process of breaking a heavy nucleus after the bombardment of neutrons into two small nuclei is called:

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Nuclear fission reaction

Nuclear fusion reaction

Nuclear Radiation

Nuclear chain reaction

When 1 tonne of coal is burnt then amount of energy is released .

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36 x 10⁸ J

36 x 10⁹J

36 J

36 x 10¹⁰J

The increase in thermal pollution of environment means.

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Increase in the entropy

Decrease in the entropy

Entropy remains constant

Entropy becomes zero

During adiabatic process, which factor remains constant.

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Entropy

Pressure

Momentum

Power

The law of conservation of energy gives us

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Equation of continuity

Stock's law

Bernoulli's equation

Viscosity

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

Using a graded Index fibre, the time difference is reduced to about.

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1 ns per km

33 ns per 100 km

33 ns per km

1 ns per 100 km

Which one is true for isothermal process.

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Q = 0

W = 0

Q = W(D) Delta U = 0

None of these

A mass of 1 kg is freely falling. The force of gravity is.

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1 N

9.8 N

0.5 N

Zero

The weight of the body at the centre of earth is

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Maximum

Minimum

Zero

Infinite

A body of mass 2 kg moving with velocity of 4 ms-1 has K.E. equal to.

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16 J

8 J

32 J

2 J

In matter, the Atoms are in a state of never ending

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Motion

Rest

Change

State of decline

When two waves having same frequency traveling in same direction combine, phenomenon is called

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Wave motion

Combination of waves

Interference

Diffraction

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None of the above

The output voltage of a rectifier is.

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Smooth

Pulsating

Alternating

Per featly direct

When the back emf in a current is zero, it draws

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Zero current

Maximum current

Minimum current

Steady average current

Albert Einstein got noble prize in:

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1926

1921

1918

1931

Which one of the following is crystalline solid.

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Zirconia

Glassy solid

Natural rubber

Poly strene

An electric field cannot deflect

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X-rays

a-particles

ß-particles

None of these

Bremsstrahlung radiation are examples of

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Atomic spectra

Molecular spectra

Continuous spectra

Discrete spectra

The application of mutual induction is a.

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D.C. motor

Radio

Television

Transformer

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these