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Question

Find out the current through 2Ω resistor in the circuit shown in figure.

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A
2.5 A
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B
5 A
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C
1.25 A
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D
2 A
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Solution

The correct option is A 2.5 A
When the current was passed through the liquid A, it was sufficient enough to make the electric bulb to glow. But when the liquid A was replaced by Liquid B, the current passing through the liquid was not sufficient for the bulb to glow.
Now, when the electric bulb was replaced by an LED bulb, according to Boojho's suggestion the LED bulb glowed as the current passing through the Liquid B was sufficient for it to be powered. It is to be noted that a LED bulb consumes less current than an ordinary electric bulb.

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