Advertisements
Advertisements
Question
State the condition when it is advantageous to connect cells in series.
Advertisements
Solution
It is advantageous to connect cells in series if the external resistance is large enough compared to the total internal resistance of cells.
RELATED QUESTIONS
A flash of lighting carries 10 C of charge which flows for 0.01 s. What is the current? If the voltage is 10 MV, what is the energy?
In the circuit diagram given below five resistances of 10 Ω, 40 Ω, 30 Ω, 20 Ω, and 60 Ω are connected as shown to a 12 V battery.
Calculate:
(a) total resistance in the circuit.
(b) total current flowing in the circuit.
Define the following:
Semiconductors
Find the effective resistance in the following circuit diagrams (Fig.):
A bulb is connected to a battery of p.d. 4 V and internal resistance 2.5 Ω . A steady current of 0.5 A flows through the circuit. Calculate:
The total energy supplied by the battery in 10 minutes
State whether the following statement is True or False:
The SI unit of charge is the coulomb.
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.
What is meant by internal resistance of a cell?
State whether true or false. If false, correct the statement.
Current can produce magnetic field.
