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A Low Voltage Supply from Which One Needs High Currents Must Have Very Low Internal Resistance. Why? - Physics

A low voltage supply from which one needs high currents must have very low internal resistance. Why?

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Solution

According to Ohm’s law, the relation for the potential is = IR

Voltage (V) is directly proportional to current (I).

R is the internal resistance of the source.

`I=V/R`

If V is low, then R must be very low, so that high current can be drawn from the source.

Concept: Ohm’s Law
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APPEARS IN

NCERT Class 12 Physics Textbook
Chapter 3 Current Electricity
Q 18.3 | Page 129
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