400 j is produced in 4 s in a 4 ohm ressistance find the potential difference acros the resistor
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As we know that ,
H = V I t = I^2 R t
or, 400 = I^2 × 4 × 4
so, I^2 = 400/16 = 25
so, I = 5 A
and as 400 = V I t
or, 400 = V × 5 × 4
so, V = 400/(5×4) = 20 V
H = V I t = I^2 R t
or, 400 = I^2 × 4 × 4
so, I^2 = 400/16 = 25
so, I = 5 A
and as 400 = V I t
or, 400 = V × 5 × 4
so, V = 400/(5×4) = 20 V
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