Physics
Write the expressions for the equivalent resistance R of three resistors R1, R2 and R3 joined in (a) parallel, (b) series.
Related Questions
For parallel combination of resistances, which of the statements are correct ?
- On I-V graph, the slope of line is more.
- The potential difference across each resistance is same.
- The current in a resistor is inversely proportional to the resistance.
- All of the above
Assertion (A): The terminal voltage of a cell is always less than its e.m.f.
Reason (R): More the current drawn from the cell, the less is the terminal voltage.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
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.
Which of the following combinations have the same equivalent resistance between X and Y?
