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प्रश्न
What is meant by internal resistance of a cell?
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उत्तर
The resistance offered by the electrolyte inside the cell to the flow of current is called internal resistance of cell.
संबंधित प्रश्न
Which type of circuit, series or parallel, is preferred while connecting a large number of bulbs:
(a) for decorating a hotel building from outside?
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 |
An electric current flowing in a wire creates ______ around the wire.
Complete the following sentence:
A fuse is a short piece of wire of high ......... and low
Fig. shows a 3 pin plug with the cover removed. The electric cable
connected to the plug contains 3 wires with colour coded insulation namely brown, blue and green.
- Identify each of the colour coded wires by stating to which of the
terminals A, B or C in the diagram they should be connected. - Identify the terminal through which no current passes in normal
circumstances. - What is the purpose of the earthed wire connected to an electric
appliance like an electric heater? Describe how it works.
A bulb of 40 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
- What is meant by electric current?
- Name and define its unit.
- Which instrument is used to measure the electric current? How should it be connected in a circuit?
Calculate the current in a wire if a charge of 1500 coulomb flows through it in 5 minutes.
