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12th Maharashtra Board
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A circular loop has a resistance of 40Ω. Two points P and Q of the loop, which are one quarter of the circumference apart are connected to a 24 V battery, having an internal resistance of 0.5Ω. What is the current flowing through the battery. 

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Important Questions on Current Electricity

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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 1
To find the resistance of a gold bangle, two diametrically opposite points of the bangle are connected to the two terminals of the left gap of a metre bridge. A resistance of 4Ω is introduced in the right gap. What is the resistance of the bangle if the null point is at 20 cm from the left end?
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
Define or describe a Potentiometer.
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
Write down the definition of potential gradient.
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
Why should not the jockey be slided along the potentiometer wire? 
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
Are Kirchhoff s laws applicable for both AC and DC currents?
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
In Wheatstone's meter-bridge experiment the null point is obtained in middle one third portion of wire.
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12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
State any two sources of errors in meter-bridge experiment. Explain how they can be minimized.
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 9 - Current Electricity>Exercises>Q 2
What is potential gradient? How is it measured? Explain.