Question

In the circuit shown below, the reading of the
voltmeter V is :-
(1) 12 V
(2) 8 V
(3) 20 V
(4) 16 V

Answer 1

Answer:

4) 16V

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Answer 2

Explanation:

• In the above circuit the upper 2 resistors are connected in series connection....so their resistance, R= 4+ 16 = 20 ohm.
• similarly, the lower 2 resistors are also connected in series connection ,R'= 4+16=20 ohm
• the upper resistors are connected to the lower 2 resistors in parallel connection....so 1/Rp= 1/20+1/20=2/20=1/10........so Rp= 10 ohm
• now using the relation , V=IR , V= 2 × 10 = 20V
• so the total voltage in the voltmeter is 20V , option 3