Question:
A step down transformer has \(50\) turns on secondary and \(1000\) turns on primary winding. If a transformer is connected to \(220\) V and \(1\) A a.c. source, what is the output current of the transformer?
A step down transformer has \(50\) turns on secondary and \(1000\) turns on primary winding. If a transformer is connected to \(220\) V and \(1\) A a.c. source, what is the output current of the transformer?
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For an ideal transformer, Ip Np = Is Ns, so the secondary current is larger by the turns ratio.
Updated On: Nov 12, 2026
- \(\frac{1}{20}\) A
- \(20\) A
- \(100\) A
- \(2\) A
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
For an ideal transformer, input power equals output power, so \(\dfrac{I_s}{I_p}=\dfrac{N_p}{N_s}\).
Step 2: Substitute
\(\dfrac{N_p}{N_s}=\dfrac{1000}{50}=20\).
Step 3: Output Current
\(I_s=20\times1=20\) A.
Final Answer:
The output current is 20 A. \[ \boxed{\text{(B) }20\text{ A}} \]
For an ideal transformer, input power equals output power, so \(\dfrac{I_s}{I_p}=\dfrac{N_p}{N_s}\).
Step 2: Substitute
\(\dfrac{N_p}{N_s}=\dfrac{1000}{50}=20\).
Step 3: Output Current
\(I_s=20\times1=20\) A.
Final Answer:
The output current is 20 A. \[ \boxed{\text{(B) }20\text{ A}} \]
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