Question

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Answer 1

Answer:

Ans-1 The direction of an electric current is by convention the direction in which a positive charge would move. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. Electrons would actually move through the wires in the opposite direction.

Ans-2 Tungsten is used for making filament of an electric bulb due to the following reasons: Being an alloy it has a very high melting point. It has very high resistivity so it does not burn easily at room temperature. The lamp glows at high temperatures.

Ans-3  Cells (battery) are a source of energy for the torch. Chemical energy is stored in the battery which is changed into electrical energy and then light energy as the light glows. An electric circuit is a pathway that allows electricity to flow or a system that allows electrical energy to move.

Ans-4 Silver is the best conductor of electricity because it contains a higher number of movable atoms (free electrons).

Ans-5 two terminals

All electrochemical cells have two terminals, referred to as the anode and cathode or positive (+) and negative (-).

Answer 2

Answer:

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