Question

UR-122
Q.4. Draw a circuit diagram consisting of a battery of four cells each of 2V, a 2 ohm resistor,
4 ohm resistor and 6 ohm resistor, a plug key and an ammeter all connected in series.
Also connect a volumeter across 6 ohm resistor. Also find the current flowing in he circuit
(ammeter reading) and the potential difference across 6 ohm resistor (voltmeter reading).
Ans. : 4V​

Answer 1

Given:

A circuit diagram consisting of a battery of four cells each 2V, a 2 ohm, 4 ohm and 6 ohm resistor, a plug key and an ammeter all connected in series.

Also connect a voltmeter across 6 ohm resistor.

To find:

Find the current flowing in the circuit and the potential difference across 6 ohm resistor.

Solution:

Consider the attached figure while going through the following steps.

The total/equivalent resistance = R = 2 + 4 + 6 = 12 Ω

The total/equivalent voltage = V = 4 × 2 = 8 V

The current in the circuit = I = V/R = 8/12 = 2/3 A

The voltage across 6 Ω resistance

V = I × R

= 2/3 × 6

= 4 V

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