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प्रश्न
An electrician is carrying out some repairs in your house. He wants to replace a fuse by a piece of wire. Would you agree? Give reasons for your response.
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उत्तर
- No. The electrician cannot be allowed to replace the fuse in the house with a piece of wire. This is because every wire cannot be used as a fuse filament.
- A fuse filament must have a low melting point such that it could melt and break in response to a large amount of current. Most of the wires have high melting points.
- So, we should always use ISI-marked fuses in our houses to prevent short circuits.
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संबंधित प्रश्न
Figure shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells.
Longer line in the symbol for cell represents its ______ terminal.
The combination of two or more cells is called a ______.
When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks.
Zubeda made an electric circuit using a cell holder shown in Figure, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.
In the circuit shown in figure would any of the bulbs glow when the switch is in the ‘OFF’ position?
Mark the correct choice
- Assertion: In a simple battery circuit the point of highest potential is the positive terminal of the battery.
- Reason: The current flows towards the point of the highest potential
______ is an instrument used in electric circuits to find the quantity of current flowing through the circuit.
Identify the circuit in which the electrical components have been properly connected.
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 |
 |
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| (i) | (ii) | (iii) | (iv) |
A combination of two or more cells is called a ______.
