In series combination of resistance:

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Potential difference is same across each resistance

Total resistance is reduced

Current is same in each resistance

All of the above

answer is C.

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Detailed Solution

Concept: Let I be the current flowing through the wire and V be the potential difference across AB. The positive terminal of the battery is A, and the negative terminal is B.
As a result, if the current crosses the resistance p, the voltage is reduced by ip, and the resistance q receives less voltage than p, reducing the voltage by iq once again. so, the potential difference is not the same across each of the resistance if the resistances are varied.
The sum of all resistances in a series is the equivalent resistance, which is always greater than the biggest resistance.
Hence, option 3 is correct.

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