KCET · Physics · Current Electricity
Five identical resistors each of resistance \( R=1500 \Omega \) are connected to a \( 300 \vee \) battery as shown in the circuit. The reading if the ideal ammeter \( \mathrm{A} \) is
- A \( \frac{1}{5} A \)
- B \( \frac{3}{5} A \)
- C \( \frac{2}{5} A \)
- D \( \frac{4}{5} A \)
Answer & Solution
Correct Answer
(B) \( \frac{3}{5} A \)
Step-by-step Solution
Detailed explanation
Given, \( R=1500 \Omega ; V=300 \mathrm{~V} \)
Since the resistances are in parallel. The above circuit can be reduced to the circuit as follows:
Thus, current through ammeter is \( I_{2} \), given by
\(I_{2}=\frac{V}{R}=\frac{300}{R / 3}=\frac{300}{1500 / 3}=\frac{300}{500}=\frac{3}{5}\)
Since the resistances are in parallel. The above circuit can be reduced to the circuit as follows:
Thus, current through ammeter is \( I_{2} \), given by
\(I_{2}=\frac{V}{R}=\frac{300}{R / 3}=\frac{300}{1500 / 3}=\frac{300}{500}=\frac{3}{5}\)
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