A step-up transformer has 20 primary turns and 400 secondary turns. If the primary current is 30 A, what is the secondary current?
A) 12000 A
B) 600 A
C) 30 A
D) 1.5 A

Question

Quizplus · Accepted Answer

The secondary current can be calculated using the transformer turns ratio, which is the ratio of the number of turns in the primary coil to the number of turns in the secondary coil. The formula for the current in the secondary coil is $I_2 = \frac{N_1}{N_2} \times I_1$, where $I_2$ is the secondary current, $N_1$ is the number of turns in the primary coil, $N_2$ is the number of turns in the secondary coil, and $I_1$ is the primary current. Plugging in the given values, $I_2 = \frac{20}{400} \times 30 = \frac{1}{20} \times 30 = 1.5 A$.

A Step-Up Transformer Has 20 Primary Turns and 400 Secondary