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प्रश्न
A device that is used to break an electric circuit is called ______.
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उत्तर
A device that is used to break an electric circuit is called switch.
संबंधित प्रश्न
Resistances R1, R2, R3 and R4 are connected as shown in the figure. S1 and S2 are two keys. Discuss the current flowing in the circuit in the following cases.
- Both S1 and S2 are closed.
- Both S1 and S2 are open.
- S1 is closed but S2 is open.
Match the column ‘A’ with column ‘B’.
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Column ‘A’
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Column ‘B’ |
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(1) Eka - boron
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(a) Germanium
|
|
(2) Eka - Aluminium
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(b) Scandium
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(3) Eka - Silicon
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(c) Gallium |
Increasing the current passing through the wire decreases the magnetic field intensity.
Write scientific reason.
It is beneficial to carry electrical energy in AC form as it is carried over long distances.
Higher Order Question
A student made a circuit by using an electric cell, a switch, a torch bulb (fitted in the bulb holder), and copper connecting wires. When he turned on the switch, the torch bulb did not glow at all. The student checked the circuit and found that all the wire connections were tight.
- What could be the possible reason for the torch bulb not glowing even when the circuit appears to be complete?
Fuse is
Three bulbs are connected end to end from the battery. This connection is called _______.
Draw a circuit diagram of an electric circuit containing a cell, a key, an ammeter, a resistor of 2 Ω in series with a combination of two resistors (4 Ω each) in parallel and a voltmeter across the parallel combination. Will the potential difference across the 2 Ω resistor be the same as that across the parallel combination of 4 Ω resistors? Give reason.
A complete circuit is left on for several minutes, causing the connecting copper wire to become hot. As the temperature of the wire increases, the electrical resistance of the wire
