B: iron
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The diagram shows part of an a.c. generator when its coil is in a horizontal position. The graph shows the voltage ou…
Two straight electrical conductors are parallel to one another. Each carries a current, one into the plane of the pap…
A current-carrying wire is placed between the poles of a magnet. What is the direction of the force on the wire due t…
A 6V supply is connected in series with an ammeter and a 4Ω resistor. What is the reading on the ammeter?
Sets of voltage-current readings are obtained for different electrical components. Which set of readings is for a 10Ω…
A student tests the circuit of a press-button telephone with a lamp and a battery. Which single switch can be pressed…