Question

From a battery of potential difference 20 V, current 3 A flows through a wire for 90 min. Find the electrical energy supplied by the battery.

• A. 324000 J
• B. 243000 J
• C. 234000 J
• D. 320400 J

Answer 1

The correct option is A

324000 J

Given:

Potential difference (V) = 20 V

Current (I) = 3 A

t = 90 min = $90\times 60=5400s$ ($\because 1min=60s$)

Energy supplied = $V\times I\times t$

= $20\times 3\times 5400$

= 324000 J