The power transformer and rectifier of a...

Question 1 / 20RAM72WgJ6kwGPbWcpFAH

Question 1 of 20RAM72WgJ6kwGPbWcpFAH

The power transformer and rectifier of a radio receiver are designed to supply a plate voltage of 250 V when operating from a 110 V 60 Hz supply, if the transformer is connected to 110 VDC what will happen?

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Question 1 of 20

RAM72WgJ6kwGPbWcpFAH

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🔍 Key Concepts

• Transformers only work with changing (AC) voltage, not steady DC • What happens to current in a transformer primary if you apply DC instead of AC? • Relationship between winding resistance, current, and heating (I²R losses)

💭 Think About

• Think about whether a transformer can transfer energy from primary to secondary when the input is pure DC with no change in voltage over time. • If the core quickly saturates with DC and there is no normal inductive reactance to limit current, what happens to the current in the primary winding? • Would the secondary see any induced voltage with a steady DC input on the primary, and can it overheat without current flow?

✅ Before You Answer

• Confirm that transformer action (induced voltage) requires a changing magnetic field (AC), not constant DC. • Consider which winding actually carries excessive current when inductive reactance disappears and only the small copper resistance limits current. • Verify whether the secondary can overheat without significant current flowing in it, if no AC voltage is induced.

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Question 1 of 20

The secondary would burn out

The primary would overheat and burn out

The circuit breaker would open to protect the circuit

Either A or B

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Question 1 / 20RAM72WgJ6kwGPbWcpFAH

Question 1 of 20RAM72WgJ6kwGPbWcpFAH

Back

Question 1 of 20

RAM72WgJ6kwGPbWcpFAH

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

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