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प्रश्न
The e.m.f of a cell is analogues to ______ of a pipe line.
उत्तर
The e.m.f of a cell is analogues to
a pump of a pipe line.
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संबंधित प्रश्न
An electric bulb of 300Ω draws a current of 0.4 A. Calculate the power of the bulb and the potential difference at its ends.
Explain the meaning of the term e.m.f. of a cell.
A battery o f e.m.f. 3 Vis connected in series with an ammeter, a 10 Ω coil of wire and with a parallel combination o f resistance of 3Ω and 6 Ω. Draw a circuit diagram for the above arrangement. What is the
(a) Resistance of the parallel combination?
(b) Reading on the ammeter?
( c) Potential difference across the 3Ω resistor?
( d) Current flowing through each resistor?
State the factors on which the e.m.f of a cell depends.
A cell of e.m.f. E and internal resistance r is used to send current I in an external resistance R. Write expressions for (i) the current drawn from the cell,
(ii) the terminal voltage V of the cell, and
(iii) the voltage drop across the internal resistance. How are E and V related?
A cell of e.m.f. 1.5 V and internal resistance 1.0 W is connected to two resistors of 4.0 W and 20.0 in series as shown in the figure: Calculate the:
(i) Current in the circuit.
(ii) Potential difference across the 4.0 ohm resistor.
(iii) Voltage drop when the current is flowing.
(iv) Potential difference across the cell.
Electrons in outer orbits are called free electrons.
Define the following:
Electromotive force (e.m.f.)
