With an accidental ground on leg B as shown...

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Question 1 of 205eccefa4bacbc34ba4d483ce

With an accidental ground on leg B as shown in figure "A" of the illustration, which of the lamps would be brighter after the test pushbutton switch has been depressed? See illustration EL-0008.

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Question 1 of 20

5eccefa4bacbc34ba4d483ce

With an accidental ground on leg B as shown in figure "A" of the illustration, which of the lamps would be brighter after the test pushbutton switch has been depressed? See illustration EL-0008.

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🔍 Key Concepts

• Ungrounded two-wire system with ground detection lamps as shown in Figure A • Effect of an accidental ground on one conductor when another point is intentionally grounded by the test pushbutton • How voltage divides across two equal lamps when one side is effectively shorted to ground

💭 Think About

• Before the fault, when you press the test pushbutton, how is the voltage shared between lamp A and lamp B? Sketch or imagine the circuit with no fault. • Now add the accidental ground on leg B: which lamp is now directly connected between the live conductor and ground, and which lamp has little or no voltage across it? • Think about current paths: through which lamp can current actually flow from the unfaulted conductor to ground after the fault and test button are applied?

✅ Before You Answer

• Redraw the circuit with the fault and the test pushbutton both made and mark which points are at ground potential. • Verify which lamp has full line voltage across it and which lamp has zero or very small voltage across it. • Confirm that both lamps are assumed to be identical so brightness depends only on the voltage each one receives.

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Question 1 of 205eccefa4bacbc34ba4d483ce

With an accidental ground on leg B as shown in figure "A" of the illustration, which of the lamps would be brighter after the test pushbutton switch has been depressed? See illustration EL-0008.

Back

Question 1 of 20

5eccefa4bacbc34ba4d483ce

With an accidental ground on leg B as shown in figure "A" of the illustration, which of the lamps would be brighter after the test pushbutton switch has been depressed? See illustration EL-0008.

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

— No credit card needed