Question # 1

The formula of conversion of Celsius into Kelvin is:

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Tk = 273 - C^o

Tk = 273 + C^o

F = 1.8 + 32

All of these

What kind of waste is produced by nuclear power plant?

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Carbon di oxide

Radio active

Fuels

Toxic material

From following in which device thermostat is used:

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Electroscope

Electric Bell

Electric Iron

Radio

An ideal system gives output:

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50%

60%

80%

100%

Andromeda is one of the billions of galaxies of known.

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Star

Asteroid

Pole

Universe

The quantities that describe completely by magnitude and direction are.

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Scalar

Vector

Base

Derived

Fossil fuels are usually:

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Carbon di oxide

Hydrogen

Hydrocarbons

Carbon monoxide

S.I unit of force is:

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N

Ns

s

None

Highly conducting state of matter is:

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Solid

Liquid

Gas

Plasma

The value of g at a height one Earth's radius above the surface of the earth is:

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2g

1/2 g

1/3 g

1/4 g

Coloured surface is a

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Best emitter

Good emitter

Bad emitter

Wrost emitter

According to Fleming's left hand rule the direction of force on the conductor is given by:

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Thumb

Fore finger

Middle finger

None of these

X=A.B. This equation is used for which operation:

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AND

OR

NOT

NAND

Which instrument is used to measure current, resistance and potential difference:

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Galvanometer

Digital meter

Voltmeter

Ammeter

the distance between two consecutive trough or crest is called:

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wavelength

frequency

time period

amplitude

Iron core is used in tranformer to:

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Enhance the flux

Decrease the flux

Keep flux the same

botha a and b

Sun light consist of ____________ colour

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6

7

5

2

the substance in which electric current flows easily is called:

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transistor

semi conductor

insulator

conductor

The waves in which particles of the medium vibrate perpendicular to the directions waves are:

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Electromagnetic waves

Sound waves

bothe a and b

Transverse waves

Safe level of noise depends on factors:

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One

Two

Three

Four

In there is no extension in the spring then this positon is called

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Equilibrium position

Unequilibrium

Nautral equilibrium

Stable equilibrium

The number of lines of force in a magnetic field depends upon.

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Shape of coil

Sixe of coil

Magnet

Strength of field

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

Which one is a conservative force

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Elastic spring force

Air resistance

Frictional force

Tension in the spring

More details of an object can be seen with a microscope by using

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Green light

Red light

Yellow light

Blue light

If a rocket is accelerating upward with an acceleration of 2 g, an astronaut of weight, mg in the rocket shows apparent weight.

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Zero

Mg

2 mg

3 mg

A layer over the central core of the jacke is called.

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Jacket

Plastic

Cladding

Rubber

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

the louder the sound, the greater will be its.

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Speed

Frequency

Amplitude

Wave length

Frequency 'f' and time period 'T' are related as

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Substances that don't flow easily has

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Large co-efficient of viscosity

Small co-efficient of viscosity

Medium co-efficient of viscosity

Zero-coefficient of viscosity

Which of the following quantities remain constant in step up transformer?

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Current

Voltage

Power

Heat

Pulsating output of full wave rectifier can be made smooth by using circuit called.

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Filter

Amplifier

Resistor

Transistor

A diode characteristic curve is a plot between

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse voltage

The place for soring the nuclear waste is

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Ocean

Damping in earth

Damping in desert

Bottom of old salt mines

A perfect absorber must also be perfect

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Cavity

Sources of radiation

Radiator

None of these

Very weak magnetic field produced by brain can be detected by

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MRI

CAT scans

Squid

CRO

Joule second is the unit of.

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Energy

Wein's constant

Planck's constant

Boyle's law

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

A soft iron cylinder is placed inside coil galvanometer to:

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Make field circular and strong

Make field radial and weak

Make field radial and strong

All of above

Torque on a current carrying coil

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τ=IBA cos

τ = ILB sinα

τ = IBA sinα

τ = ILBcosα

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number