Moderate

In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?

Correct answer: A. less than 15 A

A. less than 15 A
B. more than 15 A
C. 15 A
D. none of the above

Explanation

For an ideal step-down transformer, the primary current change is reduced in the inverse ratio of the voltage transformation: ΔI₁ = (N₂/N₁)ΔI₂, with N₂ less than N₁. Hence a 15 A secondary-current change produces a supply-current change below 15 A.

Last updated 16 September 2026

Practise Electrical Machines

1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Electrical Machines test All Electrical Machines MCQs

Exams that ask Electrical Engineering questions like this

Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

Assistant Engineer Electrical Test Electrical Engineering80 MCQs Sub Engineer Electrical Test Electrical Engineering70 MCQs

In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?

Practise Electrical Machines

Exams that ask Electrical Engineering questions like this

Related questions