Question

50 J of heat is produced each second in a 2  resistor. Find the potential difference across the resistor.

Answer 1

v^2=50*2
v^2=100
Thus,potential difference = 10 volt
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Answer 2

H = I²rt  (or I²rt  = H)

H = 50,

I = ?

r= 2 and

t = 1

I²rt = 50

I² × 2 × 1 = 50

I² = 50 × 2 × 1   = 100

∴i = √100 = 10

potential difference across the resistor = 10 V