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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 19

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A technician has only two resistance coils. By using them singly, in series or in parallel, he is able to obtain the resistance $3, 4, 12$ and $16 ohms .$ The resistance of the two coils are

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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 20

Two resistances

r_{1}

and

r_{2} (r_{1} < r_{2})

are joined in parallel. The equivalent resistance

R

is such that

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 21

The resultant resistance value of

n

resistances each of

r

ohms and connected in series is

x .

When those

n

resistances are connected in parallel, the resultant value is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 22

Twelve wires of equal resistance $R$ are connected to form a cube. The effective resistance between two diagonal ends $A$ and $E$ will be

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 25

Refer to the circuit shown. What will be the total power dissipation in the circuit if $P$ is the power dissipated in $R_{1} ?$ It is given that $R_{2} = 4 R_{1}$ and $R_{3} = 12 R_{1}$

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 26

Three identical resistors $R_{1} = R_{2} = R_{3}$ are connected as shown to a battery of constant $e . m . f .$ The power dissipated is

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 27

Four equal resistance dissipated

5 W

of power together when connected in series to a battery of negligible internal resistance. The total power dissipated in these resistance when connected in parallel across the same battery would be

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 28

A cell sends a current through a resistance