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As shown in figure a variable rheostat o...

As shown in figure a variable rheostat of `2kOmega` is used to control the potential difference across 500 ohm load. (i) If the resistance AB is `500 Omega`, what is the potential difference across the load ? (ii) If the load is removed, what should be the resistance at BC to get 40 volt btween B and C ?

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The correct Answer is:
(i) `150/7=21.43 V,
(ii)`1600 Omega`
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RESONANCE-CURRENT ELECTRICITY-Exercise-1 (Part-1)
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  5. Suppose you have three resistor of (20 omega),(50Omega)and (100 Omega)...

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  13. A galvanometer has a resistance of 30 Omega, and a current of 2 mA is ...

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  14. A voltmeter of resistances 400(Omega)is used to measure the potential ...

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  15. An electrical circuit is shown in figure. Calculate the potential diff...

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  16. A battery of emf 1.4 V and internal resistance 2 Omega is connected to...

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  18. Figure 6.13 shows a 2.0 V potentiometer used for the determination of ...

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