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प्रश्न
State the condition when it is advantageous to connect cells in series.
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उत्तर
It is advantageous to connect cells in series if the external resistance is large enough compared to the total internal resistance of cells.
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संबंधित प्रश्न
Calculate the number of electrons constituting one coulomb of charge.
Draw the electrical symbols of the following components and state its use:
Rheostat (variable resistance)
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(a) Which circuit would have the highest voltage across each bulb?
If the current passing through a conductor is doubled, what will be the change in heat produced
The following table shows the current in Amperes and potential differences in Volts.
- Find the average resistance.
- What will be the nature of the graph between the current and potential difference? (Do not draw a graph.)
- Which law will the graph prove? Explain the law.
| V (volts) | I (amp) |
| 4 | 9 |
| 5 | 11.25 |
| 6 | 13.5 |
Match the pairs.
| ‘A’ Group | ‘B’ Group |
| 1. Free electrons | a. V/R |
| 2. Current | b. Increases the resistance in the circuit |
| 3. Resistivity | c. Weakly attached |
| 4. Resistances in series | d. VA/LI |
Complete the following sentence:
A fuse is a short piece of wire of high ......... and low
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?
Conventionally, the direction of the current is taken as:
Problems for practice:
If 5A current flows through a circuit, then convert the current in terms of microampere?
