Question

PHYSICS
Three resistances 3ohm,6ohm,and 7ohmare connected in series across a potential difference of 48 v. The
potential difference across 7ohm resistance is
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Answer 1

Answer:

Potential difference is in series,than current is same every where but potential difference differ

V=i ×R

48=(3+6+7)×i

i=3 Ampere

Now P.D. In 7 ohm

V=i×R

=3×7=21 Volt

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Answer 2

Answer:

current depends on the combined resistance of the circuit across the battery.

in the given problem, combined resistance is equal to 3+6+7 = 16 ohms as they are connected in series.

therefore current flowing through the circuit is equal to, I = V//R

=> 48/16 = 3 Amperes.

now the potential difference across 7 ohms resistance will be equal to R(7ohms) × I

=> 7 × 3 = 21 Volts