Current Electricity — Important Questions
Telangana Open School (TOSS) · Class 12 · Physics
43 important questions from Current Electricity for Telangana Open School (TOSS) Class 12 Physics, with answers. Written for the board exams 2027.
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Important Questions from Current Electricity
In a series combination of resistors, the equivalent resistance is:
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Equal to the sum of individual resistances
For series combination, R_eq = R1 + R2 + R3 + ...
The internal resistance of an ideal cell is:
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Zero
An ideal cell has no internal resistance, so the terminal voltage equals the emf.
The direction of conventional current is the same as the direction of motion of:
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Positive charges
Conventional current is defined as the direction in which positive charges would move, opposite to electron flow.
Which rule is based on the conservation of charge?
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Kirchhoff's First Rule
Kirchhoff’s junction rule states that the sum of currents entering a junction equals the sum leaving, based on charge conservation.
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