Question # 1

Optics is the

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Scientific study of light and vision

Scientific study to sound

Scientific study of time

Scientific study of fluid

When heat a supplied to a metallic sphere which one of the following changes will occur.

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the mass of the sphere increases

The volume of the sphere increases

The density of the sphere increases

The internal energy of the sphere increases

Inductance are measured in

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Coulombs

Volts

Henrys

Farads

When forwarded bias is applied to a junction diode it.

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Increases the potential barrier

Decreases the potential barrier

Reduces the majority carrier current to zero

Reduces the minority carrier current to zero

The gravitational force between two bodies does not depends upon.

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The product of their masses

Their separation

The sum of their masses

The constant of gravitation

What is measured by the energy dissipated when a source drives a unit charge round a complete circuit.

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Electromotive force

Potential difference

Power

Resistance

If pressure and temperature of an ideal gas is doubled and volume is halved, the number of the gas molecules.

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Become half

Remain constant

Become double

Become three times

If the transformer turns ratio is 2 and the impedance of primary coil is 250 Ohms then the impedance secondary coil will be.

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

The magnitude of induced emf during electromagnetic induction is controlled by.

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Magnetic flux

electric flux

Electric field

Magnetic field

The SI unit of viscosity is.

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Kg m -1 s-2

kg m-1 s-1

kg ms=-1

kg m s-2

When a tennis balls is hit by a racket inasmuch a way that it spins as well as moves forward the velocity of the air on one side of the ball

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Increases

Decreases

Remain constant

Become zero

Which electrical component may be used to store electrical energy in a time delay circuit

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Capacitor

Light dependent resistor

Resistor

Thermistor

Which of the following is non renewable source of energy.

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Wind

Coal

Hydroelectric

Biomass

Which of the following is a transverse wave.

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Sound wave

Shock wave

Hair wave

Radiowave

The SI unit of angular momentum is.

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kg m-1 s

kg m2 s

kg m s-1

kg m2 s-1

Torque is equal to.

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The product of magnitude of force and acceleration

The product of magnitude of force and momentum

The product of magnitude of force and displacement

The product of magnitude of force and angular velocity

No entropy change is associated with

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Isothermal process

Adiabatic process

Isochoric process

Isoteric process

Which of the following is not true.

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Velocity can be nagative

Velocity is a scalar

Speed is a vector

Speed can be negative

If the K.E. of a body becomes four times of its initial value the new momentum will be.

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Half

Same

Four time

Double

A new class of ceramics materials was discovered in.

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1938

1958

1978

1986

The Step up transformer

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Increase the input current

Increases the input voltage

Has more turns in the primary coil

Has less time in the secondary coil

Lenz's presented his law is

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1826

1829

1834

1839

The SI unit of plane angle is

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Radian

Degree

Steradian

Radian per second

A relationship between mechanical work and heat energy was firstly established dby.

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Davy

Count Rumford

Joule

Kelvin

When a wire moves perpendicularly to a magnetic field, the induced emf does ot depends upon

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The velocity of the wire

The resistance of the wire

The flux density of the magnetic

The orientation of the wire field

Michelson used the equation to determine the speed of light.

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c = 4 fd

c = 8fd

c =12 fd

c = 18 fd

Which one fo the following is based on the diffraction and repulsion of electric charge.

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Capacitor motor

Transformer

Induction motor

synchronous motor

A pure choke consumes

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No power

Maximum power

Minimum power

Average power

A system of the equal and opposite point charges separated by a small distance is called.

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A capacitor

A dipole

An iinductor

A di electric

Which quantity provides a quantitative measure of disorder.

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Entropy

Enthalpy

Randomness

Chaos

The process in which a system undergoes a change of state at constant volume.

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Isobaric process

Isochoric process

Isothermal process

Adiabatic process

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