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

Short Note

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 V = IR

Voltage (V) is directly proportional to the 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 a high current can be drawn from the source.

Concept: Ohm's Law
Is there an error in this question or solution?

#### APPEARS IN

NCERT Physics Part 1 and 2 Class 12
Chapter 3 Current Electricity
Exercise | Q 3.18 (c) | Page 129
NCERT Class 12 Physics Textbook
Chapter 3 Current Electricity
Exercise | Q 18.3 | Page 129

Share