Question

Voltmeter reading in the given circuit is (volt-
meter is ideal)
1) 6 V
2) 8V
3) 10 V
4) 14 V
Diagram is connected.
Explanation required​

Answer 1

Answer:

current through circuit = 14 /25 voltage reading in voltmeter is (14/25)×4=2.24

Answer 2

Answer:

The voltmeter reading in the given circuit is 8V i.e.option(2).

Explanation:

Let's start by determining the circuit's equivalent resistance.

Here we can see that resistors 2Ω, 4Ω, and 1Ω(battery resistance) are connected in series. So, the equivalent resistance of the circuit is,

$R=1+2+4=7\Omega$   (1)

Now the current flowing through the circuit is calculated as,

$I=\frac{V}{R}$     (2)

When we enter the values in equation (2), we obtain;

$I=\frac{14}{7}$

$I=2A$        (3)

Now we know that in series resistance the current through the circuit is the same. So, this 2A current will flow through a 4Ω resistor. The reading of the voltmeter is,

$V'=I\times 4$

$V'=2\times 4=8V$

The voltmeter reading in the given circuit is 8V i.e.option(2).

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