Question # 1

All bodies absorb or emit energy by

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convection

radiation

conduction

both (a) & (c)

Everybody in the universe attracts other body with a force which is

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Directly proportional to the product of their masses

Inversely proportional to the product of their masses

Directly proportional to the distance between them

Directly proportional to the square of the distance between them

_____________ easily undo bolt?

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Long spanner

Medium

Short spanner

Every spanner

The S.I unit of power is:

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Newton

Watt

Joule

Coulomb

__________ is a major source of heat:

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Mercury

Sun

Fire

Moon

kgm²s^-2 = _________

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Newton

Joule

Watt

Coulomb

1 hp is equal to :

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747 W

746 W

748 W

1000 W

The product of force and momentum arm is called:

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Couple arm

Torque

Rigid body

Axis of rotation

The unit of Heat is:

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Kelvin

Joule

Jkg^-1 K^-1

kg

The turning effect of force is called:

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Torque

Parallel force

Equilibrium

Couple

On hot days cold air from sea began to move towards land:

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Sea breeze

Land breeze

Both A and B

None of these

A transformer has 100 turns in its primary and 500 turns in secondary coil. If 6 volts D.C is applied across its primary, the voltage induced across its secondary coil will be:

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0 volt

30 volts

45 volts

60 volts

1 Nano farad is equal to:

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1X10^-12F

1X10⁹F

1X10^-9F

1X10^-6F

The magnetic field of a solenoid resembles as:

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Iron wire

U-shape magnet

Bar magnet

Point charge.

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

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

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

Shock absorbers in automobiles are one practical application of:

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SHM

Random motion

Damped motion

None of these

When a uranium (92 protons) ejects a beta particle, how many protons are left in the remaining nucleus?

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92 protons

91 protons

93 protons

89 protons

In CD presence of pits is indicated by:

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0

2

3

1

In simple pendulum motion, restoring force is provided by:

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Air resistance

Tension in the string

Inertia

Weight of the body

The A.C used in Pakistan has frequency:

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60 Hz

30 Hz

50 Hz

130 Hz

When a current carrying conductor is placed in magnetic field at right angle to it. The direction of force acting upon it is:

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The same as direction of field

Opposite the direction of field

Makes an angle of 45^owith the current

At right angle to both the field and the current.

If a charge body moved against the electric field it will again

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Potential energy

K.E

Mechanical Energy

Electric potential energy

μ_∘(Ampere's constant) has value.

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4πx10^-7 WbA^-1m^-1

4πx10^-17 Wbm²

4πx10⁷ WbA^-1m^-1

4πx10-27 Wb/m²

In Helium Neon laser, discharge tube is filled with Neon gas.

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10%

15%

85%

90%

In an electronic transition atom cannot emit.

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Infrared radiations

Visible radiations

Ultraviolet radiations

Gama radiations

The substance which atom cooperates with each other in such a way so as to exhibit a strong magnetic field is called.

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Ferromagnetic

Paramagnetic

Diamagnetic

Non magnetic

SI unit of hennery which is.

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VSA-1

VS-1 A

VS-1A-1

VSA

A solid having regular arrangement of molecules throughout its structure is called.

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Amorphous solid

Polymeric solid

Crystalline solid

Glassy solid

Number of Isotopes of Neon gas are

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2

3

4

1

Direct current can not flow through.

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Inductor

Resistor

Transistor

Capacitor

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

The particles which do not experience strong force are called.

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Baryons

Hadrons

Mesons

Laptons

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