Question

The self-inductance of a straight conductor is…

• A. zero
• B. very large
• C. very small
• D. $\infty$

Answer 1

The correct option is A

zero

Explanation for correct option:

Option (A):

We know that the formula for self-inductance is given as,

$N\varphi =LI$

where $N$ is the number of turns,

$\varphi$ is the magnetic flux which is given as, $\varphi =BA\cos \theta$ where $B$ is the magnetic field, $A$ is the area and $\theta$ is the angle between the direction of the magnetic field and the area vector.

$L$ is the coefficient of self-inductance, and

$I$ is the current that flows through the circuit.

In the case of a straight conductor, the number of turns $N=0$.

Therefore, we can say that the self-inductance of a straight conductor is zero.

Hence, the correct answer is option (A).