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A Low Voltage Supply from Which One Needs High Currents Must Have Very Low Internal Resistance. Why? - CBSE (Science) Class 12 - Physics

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Question

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

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.

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Physics Textbook for Class 12 (2018 to Current)
Chapter 3: Current Electricity
Q: 18.3 | Page no. 129

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Solution A Low Voltage Supply from Which One Needs High Currents Must Have Very Low Internal Resistance. Why? Concept: Ohm’s Law.
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