What is resistance? What are different types of combination of resistors ? Why is the current flowing across all the resistors connected in series is same ?

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Solution

Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R. The standard unit of resistance is the ohm,

There are two types of combination of resistor
1)Series
2)Parallel

When components are connected in series,there's no way to “store” or “destroy” electrons.
That's why current is same.

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