Read the following to give the correct answer.
1.
| Assertion (A): | Nichrome wire gets hot when current passes through it. |
| Reason (R): | Nichrome is a high-resistance alloy, so electrical energy is converted to heat energy more effectively than in copper. |
2.
| Assertion (A): | A sharp tip on a conductor heats faster than a flat surface. |
| Reason (R): | The current is concentrated at sharp points, producing more heat per unit area. |