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What is the significance of back EMF?
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Why back emf used for a dc motor? highlight its significance.

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What is the difference between back emf and induced-emf?

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What is the purpose of a fold-back current limiter?

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What is the function of a fold-back current limiter?

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What is a wire of resistance R and radius R compressed back to?

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What will happen to Newton Ring if plate is silvered from back?

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What is the difference between closed-back and open-back headphones?

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How to bring a dead lead acid battery back to life?

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Define the following terms. (i) Precision (ii) Drift (iii) Resolution (iv) Back lash

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