Explanation: Work is defined as the product of force and displacement. The SI unit of force is Newton (N), and the unit of displacement is metre (m). Thus, Work = Force × Displacement = Newton × metre (N·m) = Joule (J).

Explanation: Slip rings are used in an AC generator to provide a continuous connection between the rotating coil and the external circuit. They allow the current to alternate smoothly without interruption. In a DC generator, instead of slip rings, split rings (commutators) are used to reverse the current direction and ensure a unidirectional flow. Transformers do not have slip rings as they work on mutual induction. Galvanometers are used to measure small currents and do not require slip rings. Difference Between AC Generator and DC Generator AC Generator Slip Rings: Yes, AC generators use slip rings. Explanation: An AC generator (alternator) uses slip rings to maintain continuous electrical contact between the rotating coil and the external circuit. This allows the current to alternate in direction, creating alternating current (AC). DC Generator Slip Rings: No, DC generators use split rings (commutators) instead of slip rings. Explanation: A DC generator uses split rings to reverse the direction of current flow so that the output is direct current (DC), which flows in one direction.

Explanation: 220 V is a common standard for household electrical circuits in many countries. It falls within a range of 220–240 V depending on the region. Countries like India, Africa, and parts of Europe use 220–240 V for AC supply. 230 V is the standard nominal voltage in many countries, including India. The difference between 220 V and 230 V is due to permissible voltage variations in the distribution system.

Explanation: Ampere's swimming rule (also known as the right-hand rule) is used to determine the direction of the magnetic field around a current-carrying conductor. According to this rule, if you hold the conductor with your right hand and curl your fingers around it, your thumb points in the direction of the current, and your fingers show the direction of the magnetic field.

Explanation: Electrolyte copper is highly pure copper that is obtained through the electrolysis process. It typically has a purity of 99.99%. This high purity makes it suitable for use in electrical and electronic applications.

Explanation: Switches are used to open or close a circuit. When the switch is in the "off" position, it opens the circuit, stopping the flow of current. When it is "on," it closes the circuit, allowing current to flow.