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CBSE Class 10 Science 2019 Outside Delhi Set 1

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Question : 27 of 27
Marks: +1, -0
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 :
(a) What are the least counts of these meters?
(b) What is the resistance of the resistor?
Solution:  
(a) 10mA10 \text{mA} and 0.1V0.1 \text{V}
(b) V=2.4V=2.4 volt, I=250mA=0.25AI=250 \text{mA}=0.25 \text{A}
From Ohm's law.
R=VI=2.40.25=9.6ΩR=\frac{V}{I}=\frac{2.4}{0.25}=9.6 \Omega
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