KCET · Physics · Current Electricity
In the circuit shown below, the ammeter and the voltmeter readings are \( 3 \mathrm{~A} \) and \( 6 \mathrm{~V} \) respectively. Then the value of the resistance \( R \) is
- A - \( 2 \Omega \)
- B \(R > 2 \Omega \)
- C \(R < 2 \Omega \)
- D \(2 \Omega\)
Answer & Solution
Correct Answer
(C) \(R < 2 \Omega \)
Step-by-step Solution
Detailed explanation
Given, voltmeter reading \( =6 \mathrm{~V} \); ammeter reading \( =3 \mathrm{~A} \)
Using ohm's law, \( V=I R ; R=\frac{V}{I} \Rightarrow R=\frac{6}{3}=2 \Omega \)
This will be the case when ideal ammeter and voltmeter are used. Therefore, the value of resistance \( \mathrm{R} \) is less than \( 2 \Omega \),
that is \( R < 2 \Omega \)
Using ohm's law, \( V=I R ; R=\frac{V}{I} \Rightarrow R=\frac{6}{3}=2 \Omega \)
This will be the case when ideal ammeter and voltmeter are used. Therefore, the value of resistance \( \mathrm{R} \) is less than \( 2 \Omega \),
that is \( R < 2 \Omega \)
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