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Resistance

When a certai...

Question

When a certain circuit consisting of a constant emf. E, an inductance L and a resistance R is closed , the current in it increases with time according to curve 1. After one parameter (E, Lor R) is changed , the increase in current follows curve 2, when the circuit is closed second time. Which parameter was changed and in what direction:-

L is increased

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L is decreased

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R is increased

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R is decreased

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Solution

The correct option is A L is increased

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$(a)$ If resistance is increased.	$(p)$ current will increase.
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$(d)$ If frequency is increased.	$(s)$ power may increase or decrease.

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