Question # 1

The main causes of power losses in a generator are.

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Pulsatng current

Eddy current

Magnetic current

Both B and C

The phase angle between the voltage and current is A.C. circuit though a resistor is.

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0 ^o

45 ^o

90 ^o

180 ^o

Materials that experience a force from stronger to weaker regions of magnetic field are called.

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Non magnetic

Paramagnetic

Ferromagnetic

Diamagnetic

The power dissipation in a pure inductive or capacitive circuit is.

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Maximum

Minimum

Zero

Infinity

Current in an electrolyte is carried by.

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Electron only

Anions only

Citations only

Mesons only

The combined effect of resistance and reactance's in A.C. circuit is called.

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Resistance

Conductance

Choke

Impedance

If positive terminal of the battery is connected to n-type and negative terminal of the battery is connected to p-type then the diode is.

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Saturated

A gate

Forward biased

Revere biased

The immediate cause of alternating currrent in the secondary coil of a transformer is

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A changing electric field

a changing magnetic field

The motion of primary coil

The iron core of the trnasformer

Artificial polymers are made by a chemical reaction known as.

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Crystallization

Electroplating

Polymerization

Polarization

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

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Magnetic flux

electric flux

Electric field

Magnetic field

The internal resistance of a primary cell depends upon the.

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Current dawn form the cell

Concentration of the solution

distance between cell electrodes

All of the above

A magnet is pushed horizontally towards a coil of insulated wire inducting an emf in the coilin which direction does the coil try to move.

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Downwards

Upwards

Away from the magnet

Towards the magnet

The magnetic flux linked with a circuit when a unit current flows through it is known as.

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Induced current

Induced emf

Coefficient of self induction of circuit

Eddy current

If a di electric is placed between the plates of a capacitor, its capacitance.

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Decreases

Increases

Remains unaffected

Is zero

In the equation P = IV cos Theta Cos theta is known as

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Phase angle

Liming angle

Phase

Power factor

The capacitance of a capacitor increases with a decreases in.

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Plate area

Permitivity

Plate separation

Dielectric constant

A choke coil is a coil with

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Low inductance and low resistance

Low inductance and high resistance

High inductance and low resistance

Low inductance and negligible resistance

In which form energy in an inductance coil is stored.

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Heat energy

Light energy

Magnetic energy

Nuclear energy

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

If we use two diodes and a centre tapped transformer we will get.

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A transistor

An amplifier

A half wave rectifier

A full wave rectifier

The maximum field that a dielectric material can with stand whiteout breaking down is called its.

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Di electric strength

Magnetic strength

Capacity

Resistance

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