Physics
Name two factors on which the internal resistance of a cell depends and state how does it depend on the factors stated by you.
Current Electricity
59 Likes
Answer
The factors on which the internal resistance of a cell depends are —
- The surface area of the electrodes — larger the surface area of electrodes, less is the internal resistance.
- The distance between the electrodes — more the distance between the electrodes, greater is the internal resistance.
Answered By
39 Likes
Related Questions
State how are the two resistors joined with a battery in each of the following cases when —
(a) same current flows in each resistor,
(b) potential difference is same across each resistor,
(c) equivalent resistance is less than either of the two resistances,
(d) equivalent resistance is more than either of the two resistances.
State two differences between the e.m.f. and terminal voltage of a cell.
A cell of e.m.f. ε and internal resistance r is used to send current to an external resistance R. Write expressions for (a) the total resistance of circuit, (b) the current drawn from the cell, (c) the p.d. across the cell, and (d) voltage drop inside the cell.
A cell is used to send current to an external circuit. (a) How does the voltage across it's terminals compare with it's e.m.f. ? (b) Under what condition is the e.m.f. of the cell equal to it's terminal voltage?