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प्रश्न
What is emf?
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उत्तर
When no current is drawn from the cell, i.e., when the cell is in open circuit, the potential difference between the terminals of the cell is called its electromotive force (or e.m.f.).
संबंधित प्रश्न
What does an electric circuit mean?
Why should the resistance of:
an ammeter be very small?
A battery of e.m.f. 15 V and internal resistance 3 ohm is connected to two resistors of resistance 3 ohm and 6 ohm in series. Find:
(i) The current through the battery,
(ii) The p.d. between the terminals of the battery.
State whether the current is a scalar or vector?
State the condition when it is advantageous to connect cells in series.
In current electricity, a positive charge refers to ______.
Name any two devices, which are working on the heating effect of the electric current.
A current of 2A passing through the conductor produces 80 J of heat in 10 seconds. The resistance of the conductor is ______.
