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Fill in the folloing blank with suitable words:
A current is a flow of ............... .For this to happen there must be a ............... circuit.
What is the conventional direction of the flow of electric current? How does it differ from the direction of flow electrons?
What happens to the other bulbs in a parallel circuit if one bulb blows off?
Name two devices which work on the heating effect of electric current.
Tick(✓) the correct choice in the following:
The outer casing of an electric iron is generally connected to earth in order
to
Two resistors P and Q of the same material and length but of different thickness are connected in parallel to a battery. The cross- sectional area of P is twice that of Q. What is the ratio of
(a) The resistance of P to the resistance of Q?
(b) The current in P to the current in Q?
When an electric current is passed, electrons move from:
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
Match the items in column-I to the items in column-II:
| Column - I | Column - II |
| (i) electric current | (a) volt |
| (ii) potential difference | (b) ohm meter |
| (iii) specific resistance | (c) watt |
| (iv) Electrical power | (d) joule |
| (v) electrical energy | (e) ampere |
