Question

the current flowing through a resistor connected in an electrical circuit and the potential difference developed across its ends are shown in the given ammeter what is the voltage and the current across the given resistor​

Answer 1

Answer:

Explanation:

Least count : the smallest reading which can be accurately measured with a Vernier caliper, screw guage or any device is called its least count.

Least can be measured by using formula,

for Ammeter,

least count of Ammeter = Range/number of divisions

Range = 0.4 - 0.2 = 0.2A

number of divisions = 10

so, least count of Ammeter = 0.2/10 = 0.02

here, main scale = 0.2A , n = 5 and least count = 0.02

reading of Ammeter = main scale + n × least count of Ammeter

= 0.2 + 5 × 0.02 = 0.2 + 0.1 = 0.3A

for voltmeter,

range = 2 - 1 = 1V

number of divisions = 10

so, least count of voltmeter = 1/10 = 0.1

here, main scale = 2V, n = 1 and least count of voltmeter = 0.1

reading of voltmeter = main scale + n × least count of voltmeter

= 2 + 1 × 0.1 = 2.1V

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Answer 2

Answer:

Least count : the smallest reading which can be accurately measured with a Vernier caliper, screw guage or any device is called its least count.

Least can be measured by using formula,

Explanation:

for Ammeter,

least count of Ammeter = Range/number of divisions

Range = 0.4 - 0.2 = 0.2A

number of divisions = 10

so, least count of Ammeter = 0.2/10 = 0.02

here, main scale = 0.2A , n = 5 and least count = 0.02

reading of Ammeter = main scale + n × least count of Ammeter

= 0.2 + 5 × 0.02 = 0.2 + 0.1 = 0.3A

for voltmeter,

range = 2 - 1 = 1V

number of divisions = 10

so, least count of voltmeter = 1/10 = 0.1

here, main scale = 2V, n = 1 and least count of voltmeter = 0.1

reading of voltmeter = main scale + n × least count of voltmeter

= 2 + 1 × 0.1 = 2.1V