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Question

A switch S is closed in the circuit shown in the figure, current passed through point A is?


20v 2QT 4Q0 oqv

A

4.5A

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B

6.0A

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C

3.0A

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D

zero

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Solution

The correct option is B

6.0A


Step 1: Given

Resistances = 2Ω,4Ωand2Ω

Step 2: Formula used and calculation

Using Kirchhoff's law at junction A

V-202+V-204+V-02=02V-40+V-20+2V=05V=60V=12VI=V-0RI=12-02I=6A

Therefore, the current through point A is 6A.

Hence, option (b) is correct.


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