A current of 2A flows in a system of conductors as shown . The potential difference (VA– VB) will be
A) +2 V B) +1 V C) –1 V D) –2 V
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128
The correct option is B: 1volt.
Explanation:
Current in branch DA=I=2x[3+2] / [(2+3)+(2+3)]=1 A
Current in branch DB=2-1=1A
now,
V-Va=2x1=2V
V-Vb=3x1=3V
( V-Vb)-(V-Va)=Va-Vb=3-2=1V
∴Va-Vb=1V
Explanation:
Current in branch DA=I=2x[3+2] / [(2+3)+(2+3)]=1 A
Current in branch DB=2-1=1A
now,
V-Va=2x1=2V
V-Vb=3x1=3V
( V-Vb)-(V-Va)=Va-Vb=3-2=1V
∴Va-Vb=1V
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