if a potential difference across a wire is 2V and current through the wire is 1 A, the electric power is
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Answer:
The potential difference, V across XY is recorded from the voltmeter. Step 2 is repeated by adjusting the rheostat to fix the current at I = 0.3 A, 0.4 A, 0.5 A, 0.6 A and 0.7 A. The corresponding values of potential difference across the wire are recorded. All the values are recorded in a table. A graph of V versus I is plotted.
The potential difference can be calculated using the equation: potential difference = current × resistance \[V=I \times R\] This is when: potential difference (V) is measured in volts (V).
When a potential difference of 2v is applied across a end of a wire of 5m length, a current of 1A is found to flow it.
The potential difference across the two wires is different, but the current through each wire is the same. Wires A and B are identical except that each is made from a different material. The one end of wire A is connected to one end of wire B. The two remaining ends are connected across a battery and current flows through the two wires.