Question # 1

The units of electric current is.

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Candela

Metre

Second

Ampere

If the mass of a body is 'm' and change in its temperature isΔT, then the heat absorbed or released is given by

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ΔQ = cmΔT

ΔQ = mΔT

ΔQ = 2cΔT

ΔQ = cmΔT2

Leslie cube have faces:

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2

3

4

5

The quantities that describe completely by magnitude and direction are.

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Scalar

Vector

Base

Derived

In building central heating system works on the process of:

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Covection

Radiation

Conduction

both a and b

During recent years the percentage of __________ increased considerably on earth:

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Carbon dioxide

Nitrogen

Oxygen

Methane

Work is zero when "F" and "S" will be:

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Parallel

Perpendicular

Anti parallel

Tangent

A mass of a body:

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Decreases when accelerated

Increases when accelerated

Decreases when moving with velocity

None of the above

It is useful to know the location of center of gravity of a body in problem dealing with

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Motion

Equilibrium

Charge

Velocity

Unit of pressure is :

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N/ m

Pa

N

m/N2

The unit of heat capacity is:

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Jkg k

JK^-1

Jkg^-1K

J^-1kg^-1K^-1

Human skin, in dry conditions, has a resistance of:

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

The instrument used to study the properties of waves is called:

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Ripple tank

Stroboscope

Pendulum

None of these

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

When resistances are connected in series the current passing through them is:

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Different

Zero

The same

None of these

the insulator between the plates of capacitor is called:

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dielectric

capacitance

resistivity

permittivity

Big unit of capacitance is:

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Farad

Volt

watt

coulomb

A converging lens becomes a magnifying glass when an object is placed:

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Outside of focal length

Inside the focal length

Equal of focal length

At double of focal length

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

Which is the most suitable means of reliable continuous communication between an orbiting satellite and Earth?

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Microwaves

Radio waves

Sound wave

any light waves

Electric field lines of force were first introduced by:

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Ampere

Farady

Fleming

Coulomb

The end of solenoid from which lines of force emerge out is called:

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North pole

South pole

North and south pole

None of these

Which is an example of irreversible process.

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Explosion

Evaporation

Slow compression

A chemical explosion

Turning of radio is example of.

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Mechanical resonance

Electrical resonance

Physical resonance

Biological resonance

Force 12 N and 5 N are add, the resultant con not be

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13 N

6 N

7 N

17 N

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

The motion of gas molecules is

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In the same direction

Random

Walls of container

Opposite to each other

A typical rocket consumes fuel about

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40000 Kgs-1

30000 Kgs-1

20000 Kg s-1

10000 Kgs-1

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The difference between two molar capacities is equal to.

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Plank's constant

General gas constant

Molar gas constant

Boltzmann constant

A diatomic gas molecules has

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Translational energy only

Rotational energy only

Vibrational energy only

All translational, Rotational and vibrational energy

The velocity of a projectile is maximum

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At the highest point

At point of launching and just before striking the ground

At half of the height

After striking the ground

Using a graded Index fibre, the time difference is reduced to about.

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1 ns per km

33 ns per 100 km

33 ns per km

1 ns per 100 km

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

Total flux through a closed surface depends on.

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Shape of surface

Medium only

Charge enclosed only

Charge and Medium

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these

The device which is used as amplifier and works with the negative feedback is.

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Operational amplifier

P-n-p transistor

n-p-n transistor

Transistor

The number of Isotopes of cesium are.

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4

32

22

36

For electromagnetic waves, Maxwell generalized

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Gauses law for magnetism

Gauses law for eletricity

Fradays law

Amperes law

Domains are existed in

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Ferromagnetic materials

Paramagnetic materials

Semi conductors

Diamagnetic materials

SI unit of hennery which is.

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VSA-1

VS-1 A

VS-1A-1

VSA

Young's modulus for water's is

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Zero

1

2

3

The value of Rydberg constant is

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1.0974 x 10⁷ m^-1

1.0974 x 10^-7 m^-1

1.0974 x 10⁶ m^-1

1.0974 x 10^-6 m^-1

The P.D develop in case of silicon is:

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0.7V

0.3V

0.5V

0.9V