Advertisements
Advertisements
प्रश्न
Define the following:
Electromotive force
Advertisements
उत्तर
Electromotive force: When no current is drawn from a cell, 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.).
APPEARS IN
संबंधित प्रश्न
What is the Flow of Charge Called?
If 20 C of charge pass a point in a circuit in 1 s, what current is flowing?
State the factors on which the strength of electric current flowing in a given conductor depends.
State whether the current is a scalar or vector?
Electrical power P is given by the expression P = (Q × V) ÷ time
(a) What do the symbols Q and V represent?
(b) Express the power P in terms of current and resistance explaining the meanings of symbols used there in.
Two electric bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to electric mains of 220 V. Find the current drawn by the bulbs from the mains.
The SI unit for electric current is the coulomb.
Unit of electric power may also be expressed as
