Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 1

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Current $l$ versus time $t$ graph through a conductor is shown in the figure. Average current through the conductor in the interval $0$ to $15 s$ is

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Important Questions on Current Electricity

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 3

A current of

10 A

is maintained in a conductor of cross-section

1 {cm}^{2} .

If the free electron density in the conductor is

9 \times 10^{28} m^{- 3},

then drift velocity of free electrons is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 4

Select the correct statement

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 5

A circuit containing five resistors is connected to a battery with a

12 V

emf as shown in figure. The potential difference across

4 Ω

resistor is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 6

The temperature coefficient of resistance of tungsten is

4.5 \times 10^{- 3} {{}^{\circ}C}^{- 1}

and that of germanium is

- 5 \times 10^{- 2} {{}^{\circ}C}^{- 1} .

A tungsten wire of resistance

100 Ω

is connected in series with a germanium wire of resistance

R .

The value of

R

for which the resistance of combination does not change with temperature is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 7

Consider the ladder network shown in figure. What should be the value of resistance $R,$ so that effective resistance between $A & B$ becomes independent of number of elements in the combination?

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 8

Effective resistance across $A B$ in the network shown in

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 9

Resistance across $A B$ as shown in figure is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 10

In the circuit shown, the thermal power dissipated in $R_{1}$ is $P .$ The thermal power dissipated in $R_{2}$ is

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