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प्रश्न
______ is the device used to close or open an electric circuit.
उत्तर
Positive is the device used to close or open an electric circuit.
APPEARS IN
संबंधित प्रश्न
The following figure shows the symbols for components used in the accompanying electrical circuit. Place them at proper places and complete the circuit.
Which law can you prove with the help of above circuit?
Distinguish between a closed circuit and an open circuit, with the use of suitable labelled diagrams.
Write the condition required for a circuit to be a closed circuit.
Match the column ‘A’ with column ‘B’.
|
Column ‘A’
|
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 |
Explain the following:
Open circuit
Flow of electricity through a closed circuit is _____.
Assertion: In an open circuit, the current passes from one terminal of the electric cell to another.
Reason: Generally, the metal disc of a cell acts as a positive terminal.
In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be
Paheli connected two bulbs to a cell as shown in Fig. 12.8.
She found that filament of bulb B is broken. Will the bulb A glow in this circuit? Give reason.
How is Joule's law effect useful in electric circuits where fuse is used as a safety device?
