What is the value of inductance of a coil that induces 20V when the current through the coil changes from 12Ampere to 20Ampere in 2 second ?

To find the value of inductance (L) of a coil, we can use the formula:

V = L * di/dt

Where:
V is the induced voltage
L is the inductance
di/dt is the rate of change of current

Given:
V = 20V
di/dt = (20A - 12A) / 2s = 8A/2s = 4A/s

Plugging in the values into the formula, we have:

20V = L * 4A/s

Simplifying the equation, we get:

L = 20V / 4A/s = 5 ohms

Therefore, the value of inductance (L) of the coil is 5 henries.