C: loudspeaker
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A current is produced when a wire is moved between two magnets as shown. Which device uses this effect?
Why is a transformer used to connect a generator in a power station to a long-distance transmission line?
A teacher sticks a magnet to the top surface of a match-box cover. The bottom surface is placed in a small tray of ir…
The diagram shows a circuit. What is the reading on the ammeter when the switch is open, and the reading when it is c…
The diagram shows a circuit. The lamp is a 12W lamp and is working at normal brightness. What are the readings on the…
A lamp rated 6 V, 2A is switched on for 60 s. How much energy is used?