Question

Draw the diagram of a circuit
consisting of a battery of 3 cells of 2V
each, a 5Ωresistor, an 8Ω
resistor and a plug key all connected in
series.(b)For the above circuit diagram
connect an ammeter to measure the
current through the
circuit and a voltmeter to measure theP.
D. across the 12Ωresistor. What would
be the readings in the ammeter and
voltmeter?

Answer 1

Answer:

The figure in the attachment include a diagram of a circuit consisting of a battery of three cells with 2 volt each.

It includes 5 ohm resistor and 8 ohm resistor connected in series.

It also includes a plug key.

In the same figure, an ammeter is connected to measure the current. And a voltmeter is connected to measure the potential difference across 13 ohm resistor ( 5 ohm + 8 ohm ).

Remember that, an ammeter is always connected in series whereas a voltmeter is connected in parallel to the resistors.

• Finding the Ammeter reading:

We know that, by Ohm's law, V = I × R.

Now, we have 3 cells in our battery of 2 volts each.

Hence, total voltage = 3 × 2 = 6 volts.

And the total resistance = 13 ohm.

So, I = V ÷ R

I = 6 ÷ 13

I = 0.46 A

So, the Ammeter reading = 0.46 A.

• Finding the voltmeter reading:

By, V = I × R

Hence, V = 6/13 × 13

V = 6 V

Hence, the voltmeter reading = 6 V.

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Answer 2

Answer:

I = 0.46 A

V = 6/13×13

V = 6v

Explanation: