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Question

Under what condition, the current drawn from the cell is maximum?


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Solution

Current flowing through a circuit:

  1. The pace at which a charge passes a circuit point is called current.
  2. Whenever the external resistance is zero could the maximum current be drawn.
  3. When maximum current is drawn, the conducting wire rating rises, resulting in lower resistance.

Mathematically, this can be represented as:

I=Er+R

Here,

r is the internal resistance of the cell.

R is the external resistance.

Resistance and area:

The property of a conductor that prevents electric current from flowing through it is called resistance.

Mathematically, resistance and area can be represented as:

R=ρ×la

Here,

ρ is the resistivity constant.

L is the length.

a is the area of cross-section.

Therefore, resistance diminishes as the area of the cross-section rises, as does the rate of current flow.


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