A piece of ice is floating in a glass beaker containing water. When all the ice melts, the level of water in the beaker will: MCQ with Answer and Explanation

Explanation:
Heat travels through spoon from hot end to cold end by conduction (molecular vibration and free electrons). Handle gets hot. Metal good conductor.

Explanation:
m = F/a = 12/4 = 3 kg.

Explanation:
Joule's law states that heat produced H = I²Rt, where I is current, R resistance, t time. This quantifies electrical energy converted to thermal energy in resistors. Ohm's law relates V, I, R; Faraday's and Lenz's laws concern electromagnetic induction. Memory aid: 'Joule heating ∝ I²R'. This definition-based question tests knowledge of fundamental laws in electricity, commonly examined in competitive exams. Applications include electric heaters, fuses, and incandescent bulbs. Always distinguish Joule's law (heating) from power formulas (P=VI=I²R=V²/R).