GATE ECE, EEE, CSE, Mechnical, Civil, Chemical Syllabus 2024 - 2025 - 1

Question: 1

The core flux in transformer depends mainly on

(A) Supply voltage

(B) Supply voltage, frequency and load

(C) Supply voltage and load but independent of frequency

(D) Supply voltage and frequency

Question: 2

With the increase in speed of a dc motor

(A) Both back emf as well as line current increase

(B) Back emf falls and line current increases

(C) Both back emf as well as line current fall

(D) Back emf increases but line current falls

Question: 3

Open circuit test in a transformer is present with

(A) High frequency supply

(B) Direct current

(C) Rated transformer voltage

(D) Rated transformer current

Question: 4

The iron core in a transformer provides a ______ path to the main flux.

(A) High conductivity

(B) Low reluctance

(C) High reluctance

(D) Low resistance

Question: 5

In a transformer, electrical power is transferred from primary to secondary.

(A) Through insulating medium

(B) By magnetic flux

(C) Through air

(D) None of these