Question # 1

Lagging of magnetic flux density behind magnetic field is known as.

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Permeability

Susceptibility

Hysteresis

Uncertainty

The charge per unit volt which is a constant property of the system is known as the

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Dielectric constant

Permitivity

Capactance

Inductance

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

Such an inductor coil which does not consume energy and is often employed for controlling A.C. without consumption of energy is called.

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Reactance

Choke

Impendence

Diode

The cause of production of eddy current is the

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Current flowing in a conductor

Current flowing in a insulator

Motion of a conductor in a varying magnetic field

Motion of an insulator in a varying magnetic field

Since a diode permits the flow of current only in one direction so it can be used as.

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An oscillator

A rectifier

A phot deflector

A transistor

Which of the following does not reflect the laws of static charges.

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like charges repel

Opposite charges attract

Neutral charges repel

Neutral objects are attracted to charged ones.

In a charged capacitor the energy resides

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In the negative plate

In the positive plate

In the field between the plates

Around the edge of the plates

At which temperature a ferromagnetic material is converted into a paramagnetic one.

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curie temperature

Boyle's temperature

Natural temperature

Neutral temperaturre

If the source of emf is traversed from negative to positive terminal the potential charge.

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Is negative

Is positive

Is zero

Remain the same

When a diamagnetic substance is inserted in a current carrying coil the magnetic field is

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Decreased

Increased

unchanged

Increased or decreased, depending upon the relative volume of the substance

A plug connoted to a table lamp contains a 3 A fuse Why is the fuse needed.

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To increase the resistance of the circuit

To make it easier for the current to flow

To protect the wiring form overheating

To reduce the voltage across thelamp

Para magnetism is.

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A distrotion effect

An orientation effect

A skin effect

A resistance

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

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125 Ohms

250 Ohms

500 Ohms

1000 Ohms

What is term for tendency of a system to oscillate with larger amplitude at some frequencies than at others.

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Resonance

Impedance

Inductance

Capacitance

The inductance in a coil plays the same role as

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Inertia plays in machans

torque plays in machines

Energy plays in machines

Momentum plays in machines

The sensitiveness of a moving soil galvanometer can be increased by

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Decreasing the number of turns of the coil

Decreasing the area of the coil

Increasing the couple per unit twist of the suspension

Increasing the magnetic flux

The Lenz's law is also a statement of the law of conservation of.

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Energy

Mass

Momentum

Torque

In electronegative waves the electric and magnetic fields are.

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Parallel to each other

Perpendicular to each other

antiparallel to each other

At an angle of 45 ^o to each other

An Electric kettle should always be fitted with an earth connection as a protective device What is being protected by the earth connection.

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The cable connecting the kettle

The fuse in the circuit

The heating element of the kettle

The person using the kettle

Inserting a di electric between the plates of a charged parallel plate capacitor.

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Decrease the capacitance

Leaves teh capacitance the same

Encourages breakdown between the plates

Reduces the electric intensity between the plates

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