Question # 1

________ is the height of an object or place above sea level.

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Altitude

Depth

Sun

Moon

Einstein's mass-energy equation is

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E = mc

E = mc2

E = 2mc

E = m2c

The velocity of geostationary satellites with respect to the Earth is:

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Maximum

Zero

Minimum

100 ms^-1

The formula for centripetal force is:

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Fc = mv2

Fc = mr2

Fc = mv2 / r

Fc = m/v

The speed of satellites in GPS is:

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8.73 kms^-1

3.87 ms^-1

32 ms^-1

3.87 kms^-1

Evaporation causes:

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Melting

Boiling

Freezing

Cooling

The unit of velocity and speed is.

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ms

ms^-2

ms^-1

ms-3

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

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

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a Torque

a couple

Equilibrium

Netural equilibrium

Good conductor is :

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Air

Wood

Iron

None

Heat form one of a metal rod a reaches to the other by the process of

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convection

radiation

conduction

both (a) and (b)

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

What will be the capacitance of capacitor by joining them in parallel:

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Increased

Much less

Decrease

No change

The presence of a magnetic field can be detected by a

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small mass

Stationary positive charge

Stationary negative charge

Magnetic compass

The speed of sound in air at 0 ^oC is:

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331 ms^-1

332 ms^-1

333 ms^-1

336 ms^-1

What happens to the intensity of the brightness of the lamps connected in series as more and more lamps are added?

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Increases

Decreases

Remains the same

Can not be predicted

Which is used to investigate the properties of electron beam:

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LDR

Electroscope

Proton gun

Electron gun

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

Formula for time period of spring mass system is represented by:

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T = 2π√m/k

T = 2π √k/m

T = 1/2π√k/m

T = 1/2π√m/k

How does sound travel from its source to your ear?

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Byc changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

The efficiency of diesel engine is about

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25 % to 30%

35% to 40%

40% to 50%

50% to 60%

The final image seen through ey piece in telescope is.

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Real, enlarge and inverted

Vertual, enlarge and erect

Virtual, enlarge and inverted

In Real, enlarge and erect

A Carnot engine has an efficiency of 50% when its sink temperature is at 27 ^oC. The temperature of source.

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273^oC

300 ^oC

327 ^oC

373 ^oC

Direction of angular acceleration is always along

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x-axis

y -axis

z-axis

The axis of rotation

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

Food rich in proteins is:

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potato

grapes

vegetables

bread

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

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Force

Momentum

Energy

Power

The work done in gravitational field

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Depend upon the path

Does not depend upon the path

(+)ve

Zero

If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

When back emf in motor is zero, it draws.

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Zero current

Minimum current

Maximum current

Steady current

If the length of solenoid is doubled but N same, B inside the solenoid becomes.

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Half

Doubled

One fourth

Four times

Substance which break just after the elastic limit is reached are called as.

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Ductile substances

Hard substances

Britto substances

Soft substances

The binding energy for_________ is maximum.

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Copper

Glass

Iron

Aluminum

The potential difference between the head and tail of an electrical to

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600 Volt

700 Volt

800 Volt

900 Volt

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

In case of capacitor, the unit of reactance is

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Farad

Ohm

Newton

All of these

The shortest wave length is Bracket series has wave length.

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16/Rn

Rn/16

16 Rn

4 Rn

How many times, the alpha particle is more massive than electrons.

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6332

7332

8332

9332

The device in which induced emf is statically induced emf is:

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Transforms

AC generator

Alevator

Dynamo

Transistor was invented by:

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Bardeen

Micheal faraday

Lenz

Newton