Question

When the positive of bulb is connected with negative cell and
negative of bulb is connected with positive of cell, the bulb does not
glows

Answer 1

Answer:

The bulb will glow only if the wire connecting it and the two terminals forms a complete loop. One terminal of the bulb may be connected to the positive terminal of the battery, and the other to the negative terminal, or vice versa

Explanation:

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Answer 2

(i) Current always flows from positive terminal of a battery to negative battery through the whole circuit. In case of Q to P, current will flow from positive terminal Q to negative terminal P. In case of P to Q, current will flow from negative terminal P to positive terminal Q.

(ii) Current is flowing in both the cases so the bulb will glow in both the cases.

(iii) The amount of current and voltage the circuit decides whether the bulb will glow brighter or duller. It is not affected by direction of current flow.