Science Practical (C10)

The current flowing through a resistor connected in a circuit and the potential difference developed across its ends are as shown in the diagram by milliammeter and voltmeter readings respectively:

  1. What are the least counts of these meters ?
  2. What is the resistance of the resistor ?

Answer

Least Count

Least count of ammeter = 10 mA

Least count of Voltmeter = 0.1 V

Resistance

R = V/I

Voltmeter Reading = 2.4 V

Milliammeter Reading = 250 mA = 0.25 A

So, R = 2.4/0.25 = 9.6 ohm