Question # 1

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

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

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

A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be:

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Doubled

Halved

Remain the same

One fourth

Ampere second stands for the unit of.

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Charge

emf

energy

Power

Heat generated by a 40 W bulb in one hour is.

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140 J

1440 J

14400 J

144000 J

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

What is the resistance of carbon resistor which has band brown black brown.

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100 Ohm

1000 Ohm

10 Ohm

1.0 Ohm

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

The color code of "Green"

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8

3

5

7

Resistance tolerance for gold colour is.

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50%

30%

20%

5%

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

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

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

The value of maximum output power is?

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E/4R

E²/4R

E/4R²

Non of above

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