When resistances are connected in series

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same voltage is applied across all resistors

resistances must be same

same current flows through all resistances

All

answer is C.

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Detailed Solution

Concept: When the same amount of current passes through each resistor at the same time, two or more resistors are said to be linked in series. The voltage across each resistor in such circuits varies. If any resistor in a series connection breaks or has a problem, the circuit as a whole is shut off.
The electrical components are connected in series and are said to carry the same physical current, but the potential difference is distributed by the resistance of the individual components. Therefore, the same current flows through all resistors connected in series.
Hence, the correct option is 3.

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