B: 2.0 V
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A student tests the circuit of a press-button telephone with a lamp and a battery. Which single switch can be pressed…
The metal case of an electric heater is earthed. The plug to the heater contains a 5 A fuse. There is a current of 4 …
A cathode-ray oscilloscope is connected to an a.c. generator. A wave is seen on the screen of the oscilloscope. The s…
Convex lenses are used in cameras and as magnifying glasses. Which types of image are formed?
A hospital needs to sterilise medical equipment. Which electromagnetic waves could be used?
A flash of lightning and the corresponding sound of the thunder are detected 6s apart. A student calculates that the …