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

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If $R_{1}$ and $R_{2}$ are the resistances of two resistors having power $50 W$ and $100 W$ respectively designed to operate at same voltage, then $\frac{R_{1}}{R_{2}}$ 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 9

Which one of the following has negative temperature coefficient of resistance?

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 11

Establish the relation between current

(I)

and drift velocity

(V_{d})

of electrons in a conductor is (where

n

is the number density of electrons and

A

is cross-sectional area)

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 13

In the absence of electric field, possible path of free electrons inside a conductor between consecutive collision is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 16

If there is no deflection in the galvanometer in the given network, then the value of resistance $R$ is

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

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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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