Question # 1

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

A certain wire has a resistance R, the resistivity of an other wire of an identical material with the first, except for twice its diameter is.

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1/4 R

4R

2R

Same as R

Heat sensitive resistors are called.

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resistors

Capacitor

Thermistors

Inductors

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/Rt

H = I²/Rt

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

The thermistors convert changes of temperature into.

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Light energy

Electric voltage

Heat

Sound

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

The algebraic sum of potential change in a closed circuit is zero.

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Kirchhoff's 1st rule

Kirchhoff 2^nd rule

Krichoff's 3^rd rule

Kirchhoff 4^th rule

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

The Kirchhoff 1^st rule is manifestation of:

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Law of conservation of mass

Law of Conservation of charge

Law of conservation of energy

None of above

The free electrons experience force.

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In direction of -E

In direction of E

Both A and B

All of the above

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

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