Question

Assertion (A): When resistors are connected in series, the effective resistance of the combination is greater than the resistances of the individual resistors.

Reason (R): When the resistors are connected in series, the effective length increases and the resistance is directly proportional to the length.

• A. A and R are true and R is the correct explanation of A.
• B. A and R are true, but R is not the correct explanation of A.
• C. A is true but R is false.
• D. Both A and R are false

Answer 1

The correct option is A

A and R are true and R is the correct explanation of A.

The explanation for the assertion statement

1. When resistors are connected in the parallel combination the resultant resistance is always greater than individual resistances.
2. When the resistances are connected in series the resultant is given by just finding the algebraic summation of all the resistances connected.

The explanation for the reason statement

When the resistances are connected in series the effective length of the wire increases and we know that the resistance of the wire is directly proportional to the length so the resistance of the wire also increases.

Hence, option A is correct.