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Q: When the potential difference is 18V then the work is done moving a charge of 4C across two points is ……..
  • A. 7.2 J
  • B. 4.5 J
  • C. 72 J
  • D. 24 J
Correct Answer: Option C - Given that, charge (Q) = 4C Voltage (V) = 18 V Work (W) = ? We know that, W = Q × V W = 4 × 18 W = 72 J
C. Given that, charge (Q) = 4C Voltage (V) = 18 V Work (W) = ? We know that, W = Q × V W = 4 × 18 W = 72 J

Explanations:

Given that, charge (Q) = 4C Voltage (V) = 18 V Work (W) = ? We know that, W = Q × V W = 4 × 18 W = 72 J