1.

400 J of heat is produced in 4 s in a 4.0ohm resistor. Find the potential difference across the resistor.

Answer»

SOLUTION :Here, H = 400 J
`:. (V^2t)/R = 400`
`:. V^2 = 400 XX R/t = 400 xx 4/4= 400`
`:. V = 20 "volts"`


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