Question # 1

Two equal but unlike parallel forces having different lines of action produce:

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a Torque

a couple

Equilibrium

Netural equilibrium

Which gas is replaced by Ammonia in refrigerators?

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Nitrogen

Carbon di oxide

Methane

Freon gas

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

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Conduction

Convection

Radiation

None

Kilowatt - hour is unit of _____________

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Power

Energy

Work

K.e

When a block a place on the surface its weight produce.

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Tension

Momentum

Inertia

Normal reaction

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

Brownian motion is an example of.

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Linear motion

Random motion

Circular motion

Vibratory motion

Energy cannot be destroyed however it can be converted into some other forms. This is known as:

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Law of heat exchange

Law of conservation of energy

Law of conservation of momentum

None of these

Moon complete its one revolution around the earth is ___________ DAYS:

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29

27.3

30

21

The weight of body is 147 N, Its mass will be ________ when g = 10 ms^-2

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1.47 kg

14.7 kg

47 kg

1.51 kg

Specific heat of glass

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780 Jkg^-1K^-1

800 Jkg^-1K^-1

840 Jkg^-1K^-1

880 Jkg^-1K^-1

Which among the following radiation has more penetrating power?

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A beta pareticle

A gamma particle

An alpha particle

None of these

If the distance between two point charges is reduced to half, the coulomb’s force become:

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Half

Two times

One fourth

Fourth times

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

the range of galvanometer to measure current is:

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few amperes

few micro amperes

few milli amperes

mega amperes

One joule per coulomb is called:

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Volt

Farad

Ampere

Tesla

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

An example of input device computer is:

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Keyboard

printer

monitor

RAM

The A.C. used in our houses has frequency _____ cycle/sec

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60

30

50

130

Transformer Works on the principle of:

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Self induction

Mutual induction

Electro statatic

Induction

The basic operations performed by a computer are:

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Arithmetic operations

Non-arithmetic operations

Logical operations

Both a and c

In simple Harmonic motion, the acceleration of the body is _____ proportional to the displacement.

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Inversely

Directly

Equally

None of these

The resultant of two vectors having magnitude 10 N and 8 N Can not be

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2 N

9 N

18 N

20 N

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

For a rocket , the change in momentum per second of the ejecting gases is equal.

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Acceleration of the rocket

Momentum of rocket

Velocity of rocket

Thrust acting on rocket

The profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

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

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Diffraction

Stationary waves

Polarization

Interference

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

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

A real transformer does not change.

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Voltage level

Current level

Power level

Frequency

The application of mutual induction is a.

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D.C. motor

Radio

Television

Transformer

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

A changing electric flux creates.

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Electric fields

Gravitational

Magnetic field

Electric charge

The ratio of applies stress to volumetric strain is called:

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Young modulus

Shear modulus

Bulk modulus

Tensile modulus

Due to polarization, electric field E.

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Increase

Decrease

First increases then decreases

Remain same

If both the length and radius of the rod are doubled, then the modulus of elasticity will:

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Increase

Decrease

Remains the same

Doubled

The mass spectrum of naturally occurring neon shows the most abundant isotope has atomic mass.

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19

20

21

22

In glass, molecules are irregularly arranged so it is known as.

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Solid

Liquid

Solid liquid

Gas

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

Electric field intensity at a point is defined by the relation.

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E= q/F

E = F/q

E = qF

E = F/q2