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Question

The potential difference across a 6Ω resistor is 12V. The current flowing in the resistor will be
  1. 4A
  2. 2A
  3. 1A
  4. 0.5A

A
2A
B
0.5A
C
4A
D
1A
Solution
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Answer is B.

According to Ohm's law, V = IR. That is, I = V/R.
In this case, the Voltage V = 12 V and Resistance R = 6 ohms.
So, I = 12/6 = 2A.
Hence, the current through the resistor is 2 A.

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