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Circuit diagram & commonly used symbols

What is the s...

Question

What is the symbol for an open switch?

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Solution

Open switch: An open switch does not allow the flow of current through it and the circuit with open switch is known as open circuit.
The symbol of an open switch:

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Q. Draw circuit symbols for (a) fixed resistance (b) variable resistance (c) a cell (d) a battery of three cells (e) an open switch (f) a closed switch.

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Closed switch Electric bulb Battery of dry cells Single electric cell Open switch

Figure

Q. In the circuit shown in figure,

E = 120 V, R_{1} = 3.0 Ω, R_{2} = 5.0 Ω

L = 0.200 H

S

t = 0

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V_{a b}

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R_{1}

?

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