Question # 1

Walking on earth is the example of which law?

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First law

Second law

Third law

Law of momentum

Weight of the body is__________ to the gravity force between body and earth:

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Less than

Greater than

Equal

Constant

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

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A torque

A couple

Equilibrium

Neutral equilibrium

Tan 𝜽 is equal to:

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Perpendicular/Hypotenuse

Base / Perpendicular

Base/Hyp

Perpendicular/Base

Which of the following affects evaporation?

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Temperature

Surface area of the liquid

Wind

All of the above

The net torque acting on a rotating body with uniform speed is:

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0

1

2

5

Sliding friction can be changed into rolling friction by using:

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Ball bearing

Roller bearing

Both a and b

None of these

Convection of heat is a process of heat transfer due to;

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Random motion of molecules

Downward motion of molecules

Upward motion of molecules

Free motion of molecules

Which of the following is the unit of momentum?

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Nm

kgms^-2

Ns

Ns^-1

The angle between rectangular components of a vector is

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0°

90°

180°

270°

Which one of the following converts light energy into electrical energy?

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Electric Bulb

Electric generator

Photocell

Electric cell

earth wire is connected with those appliances whose casing is made of:

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metals

wood

glass

plastic

The oscillations of a system in the presence of _____________ force are called amp oscillations:

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Resistive force

Attractive force

Both of these

None of these

The time period of mass attached with a spring can be calculated by:

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T = 2π√L/g

T = 1/T

T =2π√g/L

T = 2π√m/k

Which is not an e.m.f source:

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Generator

Solar cell

Battery

Rheostat

The example of magnetic disk is:

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Compact disk

Floppy disk

Audio cassette

Video cassette

The screen of a cathode ray tube consists of a thin layer of:

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Sodium

Nitrogen

Oxygen

Phosphorus

Specific resistance of aluminium in (10^-8 Ω.m) is:

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1.7

2.75

5.25

1.69

Those quantities whose values do not remain constant are called:

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physical quantities

Digital quantites

Log quantities

Analog quantities

The critical angle for glass to:

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24^o

48^o

42^o

50^o

If the distance between the charged bodies is much greater as compared to their sizes then the bodies are considered is:

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Positive charge

Negative charge

Point charge

Zero charge

The characteristics of sound by which we can distinguish between two sounds of same loudness and pitch is called.

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Intensity

Quality

Loudness

Pitch

Which one is a conservative force

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Elastic spring force

Air resistance

Frictional force

Tension in the spring

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

Entropy remains constant.

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Isothermal process

Adiabatic process

Isochoric process

Isobaric process

The SI units of flow rate are.

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m2s-1

m3s-2

m3s-1

m2s-2

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

The law of conservation of energy is the basis of.

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Stream line flow

Equation of continuity

Bernoulli's equation

Venture relation

Boltzman constant 'k' has same unit as.

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Temperature

Energy

Entropy

Pressure

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

If the radius of droplet becomes half, then its terminal velocity will become.

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Double

Half

One fourth

Remains same

Eddy current is one cause energy loss in

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A.C. generator

Transformer

D.C. motor

D.C. generator

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

Energy density in an inductor is.

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Directly proportional to magnetic field

Directly proportional to square of magnetic field

Inversely proportional to magnetic field

Inversely proportional to square of magnetic field

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

substance which undergo plastic deformation until they break are known as.

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Brittle substances

Ductile substance

Non magnetic substance

Magnetic substance

When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.

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100 Ohm

10 Ohm

1000 Ohm

1 Ohm

The maximum kinetic energy of emitted photo electrons depends upon.

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The intensity of incident light

Frequency of the incident light

Metal surface

Both frequency of incident light and metal surface.

The central region of a transistor is called.

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Emitter

Collector

Base

Neutral

Minority carriers in P-Types , substances are.

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Electrons

Protons

Holes

Neutrons

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these