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Byju's Answer

Standard VIII

Physics

Heating Effect of Electric Current

In the circui...

Question

In the circuit shown in figure, if a resistance $R_{1}$ is connected in parallel with $R_{2}$
(a) Main current i (p) will increase
(b) Power across $R_{1}$ (q) will decrease
(c) Power across $R_{2}$ (r) will remain same

a - p, b - p, c - p

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a - q, b - q, c - q

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a - p, b - p, c - q

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a - r, b - r, c - r

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Solution

The correct option is A a - p, b - p, c - p
As series resistance is more than parallel so main current I will increase. As voltage across $R_{1}$ and $R_{2}$ is $V$ when they are in parallel and it is less than V when they are in series so power across R1 and R2 will increase.

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In the circuit shown in figure, if a resistance R1 is connected in parallel with R2(a) Main current i (p) will increase(b) Power across R1 (q) will decrease(c) Power across R2 (r) will remain same

The correct option is A a - p, b - p, c - pAs series resistance is more than parallel so main current I will increase. As voltage across R1 and R2 is V when they are in parallel and it is less than V when they are in series so power across R1 and R2 will increase.

In the circuit shown in figure, if a resistance $R_{1}$ is connected in parallel with $R_{2}$
(a) Main current i (p) will increase
(b) Power across $R_{1}$ (q) will decrease
(c) Power across $R_{2}$ (r) will remain same

The correct option is A a - p, b - p, c - p
As series resistance is more than parallel so main current I will increase. As voltage across $R_{1}$ and $R_{2}$ is $V$ when they are in parallel and it is less than V when they are in series so power across R1 and R2 will increase.