Question

In which of following cases the bulb will glow:

A. Only one terminal of a cell is joined with a metal wire to one terminal of the bulb
B. Both terminals of the bulb are joined with two metal wires to one terminal of the cell.
C. One terminal of the cell is joined to one terminal of the bulb and other terminal of the cell to the other terminal of the bulb.

Answer 1

Only a complete circuit would allow the flow of electricity. Here, we have been given three cases:

A) The circuit is incomplete, as only one terminal of the cell is connected to one terminal of the bulb. Therefore, the bulb will not glow.

B) The circuit is again in complete, as only one terminal of the cell is connected to both the terminals of the bulb. Therefore, the bulb will not glow.


C) The circuit is complete, as both the terminals of the cell are connected to both the terminals of the bulb. Therefore, the bulb will glow.