A cell of emf 5 V and internal resistance is connected in series with a variable resistor.
PHYSICS · Multi-part · A Level · Physics · Electricity · Electricity
Problem
A cell of emf 5 V and internal resistance is connected in series with a variable resistor. (1) Complete this table to show how the power dissipated in the variable resistor varies when the resistance of the variable resistor is varied.| Resistance of variable resistor / | Current in circuit / A | Power dissipated in variable resistor / W |
|---|---|---|
| 1.0 | 1.25 | 1.56 |
| 2.0 | ||
| 3.0 | ||
| 4.0 | ||
| 5.0 |