The equivalent resistance of the series combination of R ohm and 5 ohm is 7 ohm. Here, R is _______.
2 ohm
The correct answer is option 3 I.e. 2 ohm.
In a series combination of resistors, the equivalent resistance
Req is the sum of the individual resistances:
Req = R + 5
We are given that the equivalent resistance is 7 ohms:
7 = R + 5
Now, solving for RR:
R = 7 -5 = 2 ohms
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