Question # 1

When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows

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0.20 C

2.5 C

5.0 C

10.0 C

The vessel containing the tow electrodes and liquid to known as.

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Chemical cell

Volt cell

Volta cell

Volta meter

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 unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

If the resistance of 500 Ohm have fourth band of silver colour then its upper maximum resistance will be.

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600 Ohm

550 Ohm

450 Ohm

400 Ohm

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

The SI unit of resistivity is.

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Ohm m-2

Ohm m-1

Ohm m

Ohm

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

The color code of "Green"

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8

3

5

7

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

Resistivity at a given temperature depends upon.

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Area of cross section

Length

Nature of material of conductor

Both length and area

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

When a wire is stretched and its radius becomes r/2, then its resistance will be

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16 R

4 R

2R

0

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

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