Question # 1

If the weight body is greater then tension then body will.

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Move upward

move downward

not move

None

Metals are good conductor of heat due to

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Free Electrons

Big size of their molecules

Small size of their molecules

Rapid vibrations of their atoms

Things with _____________ area are more stable>

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Larger

Smaller

All

None of these

Which of the substance is heaviest?

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Copper

Mercury

Aluminum

Lead

Sin 45 is equal to:

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Zero

0.5

0.707

1

The Atwood machine can be used to find the acceleration due to gravity using the equation

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g = 2 (m1 x m2)/(m1 + m2) a

g = (m1 - m2)/(m1 + m2) a

g = (m1 + m2)/(m1 - m2) a

Gravitational pull of earth is called:

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Weight

Mass

^Force

Tension

Glass and transparent polythene sheets allow radiations of wavelength to pass through them:

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Long

Medium

Short

All

Centripetal force always acts _________ to the motion:

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Opposite

Parallel

Perpendicular

Upward

When a body is lifted through a height h, the work donw on it appears in the form of its.

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Kinetic energy

Potential energy

Elastic energy

Geothermal energy

How many times Mercury is denser than water?

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12.5

13.6

76

76.5

parallel plate consists of 2 metal plates separated by:

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conductor

insulator

wooden plate

plastic foam

Mathematical formula of electromotive force (e.m.f) is:

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E = W/Q

E = Q/W

E = WQ

E = W2Q

The presence of fish by the other fish can be detected by:

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Magnetic field

Electric field

Gravitational field

All of above

Old people cannot hear sound above than:

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1000 Hz

15000 Hz

20000 Hz

The speed of sound in the air at one atmospheric pressure at room temperature is:

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343 ms-1

346 ms-1

349 ms-1

339 ms-1

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

The output of a NAND gate is 0 when:

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Both of its inputs are 0

Both of its inputs are 1

Any of its inputs is 0

Any of its inputs is 1

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

The example of magnetic disk is:

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Compact disk

Floppy disk

Audio cassette

Video cassette

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

What type of graph is in between V and I, if metal obeys ohm’s law:

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Curved

Parabola

Straight line

None of these

At which of the following temperature a body has maximum internal energy.

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-273 ^oC

0 K

273 K

-273 K

Which is not the essential component of a spectrometer.

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Collimator

Telescope

Turntable

Microscope

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

In the thermodynamics process , the equation W = -delta U represents.

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Isothermal expension

Isothermal compression

Adiabatic expansion

Adiabatic compression

The K.E. of bullet of mass 500 gm moving at a speed of 200 ms-1

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250 J

125 J

2500 J

10,000 J

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

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

The resultant of two forces 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

The formula of centripetal acceleration is

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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

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

To convert a galvanometer into an ammeter, we connect with it a

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Shunt resistance

Low value parallel

Low value by pass resistor

All of above

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

The solid with definite M.L are called:

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Crystalline

Amorphous

Polymeric

None of above

Donor impurities are

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Germanium, silicon

Indium, galium

Antimony, arsenic

Diamond, carbon

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

The middle region of electric field is:

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Maximum field spot

Zero field spot

Perpendicular field spot

All of above

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

The value of capacitive reactance is given by

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Xc = VI

All of above

split rings are used in

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A.C. generator

A.C. motor

Transformer

D.C. motor

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N