C: electrons
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An alternating voltage of frequency 0.5 Hz is applied to the Y-plates of a cathode-ray oscilloscope (c.r.o.). The dia…
A transformer connected to a 240V mains supply is used to light a 24 W lamp. The input current to the transformer is …
A polythene rod is rubbed with a duster. The duster then attracts small pieces of paper. Are the rod and the duster c…
An ice pack is used to cool 0.25 kg of water. The specific heat capacity of water is 4.2 kJ/(kg°C). How much thermal …
Fillings in teeth should be made from a material which
The displacement-distance and displacement-time graphs are for a water wave in a ripple tank. What is the speed of th…