MATERIALS AND COMPONENTS QUIZ

Spontaneous magnetisation is characteristic of ferromagnetic materials.

True

False

TRUE ANSWER : ?
YOUR ANSWER : ?

The phenomenon of dielectric hysteresis occurs with

None of these

Both AC and DC

DC

AC

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A vacant electronic state moves in the same direction as would a positive charge carrier.

False

True

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Electric dipole moment is expressed in debye unit.

False

True

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Which inductor is linear?

Cast iron cored

Sheet steel cored

Iron alloy cored

Air cored

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The resistance of a photoconductor

Increases with increase in light intensity

May increase or decrease with increase in light intensity

Remains constant

Decreases with increase in light intensity

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Which of the following are true for relative dielectric constant?1. It is dimensionless.2. It is equal to 1 for vacuum.3. It is equal to 1 for all substances.

1 and 3 only

1 and 2 only

2 and 3 only

1, 2 and 3

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A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.

True

False

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Schrodinger wave equation is a

None of these

Differential equation

Partial differential equation

Linear equation

TRUE ANSWER : ?
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If a small amount of Cu is added to Ni conductor, then

Residual resistivity of Ni at low temperature will increase as Cu atoms act as defect centres

Resistivity of Ni remains the same

Resistivity of Ni will increase at all temperatures as Cu destroys the periodicity of Ni and acts as defects

Resistivity of Ni will decrease at all temperatures because Cu is a better conductor than Ni

TRUE ANSWER : ?
YOUR ANSWER : ?