Transformer MCQ Questions Part 3. A transformer transfers energy from primary to secondary with a change in A transformer transfers energy from primary to secondary with a change in: Voltage Frequency Power Time period Correct answer: 1. Voltage A 3300/1100 ideal transformer has 50 turns on secondary. What is the number of turns on primary … Read more
Electrical Engineering MCQ presents multiple-choice questions on Resistors color coding with brief explanatory answers. Brown Black Red Golden Resistor Color Code A resistor having color bands Brown, Black, Red Gold, and Resistor have resistance (The resistance of resistor shown below) is: 100 ohm 1k ohm 4.7k ohm 10k ohm Correct answer: 2. 1k ohm Solution: … Read more
Energy consumption multiple choice questions with brief explanatory answers. A 150 W will consume how much energy when switched on for 5 hours A 150 W will consume how much energy when switched on for 5 hours: 0.25 kWh 0.5 kWh 1 kWh 10 kWh Solution: Energy consumption = kW rating * time in hours … Read more
What is demand factor MCQ Question with answer. Statement: What is demand factor: Ratio of connected load to the maximum demand Ratio of maximum demand to the connected load Ratio of connected load to reserve capacity Ratio of maximum demand to capacity factor Correct answer: 2. Ratio of maximum demand to the connected load The … Read more
A current transformer is a type of instrumentation transformer that steps down current in power systems to safe levels that can be processed via relays and measurement devices/equipment. Current transformers can be found in generation stations and switching stations. Given below are the most important Current Transformer MCQ Questions Current Transformers are used for Current … Read more
Loading effect MCQ Questions In above figure if the internal resistance of voltmeter is 5M ohm the voltmeter will display: 1.2 V 2.4 V 4 V 8 V Correct answer: 2. 2.4 V Solution: 5 Mohm internal resistance will reduce the overall resistance to 2.5 M ohm. Now from voltage divider rule: V = {2.5/(2.5 … Read more
What will the ohmmeter indicate when connected to a closed switch: 0 ohm 1k ohm 1 Mohm 0L Correct answer: 1. 0 ohm Explanation An ohmmeter connected to a closed switch will indicate a resistance of 0 ohms. (Short or closed). The reason is when the wire is closed it has almost 0 to none … Read more
Electrical Engineering MCQ Question with brief answer and explanation on Statement: A 110 V motor develops an output power of 1.5 HP while drawing a current of 15 A. What is its efficiency: 52% 67% 77% 83.5% Correct answer: 2. 67% Solution: Pin = VI = 110*15 = 1650 WPout = 1.5 * 746 = … Read more
Inches, cm, and mm, yard, foot, and inches are very basic and most important length units everyone should know. Given below are Top 10 multiple choice questions on basic unit conversions. 1 inch to centimeters 1 inch = 2 cm 2.54 cm 3.86 cm 5.92 cm Correct answer: 2. 2.54 cm 1 inch equals 2.54 … Read more
The Correct form of Ohm’s law is: V = I/R V = R/I V = IR V = I2/R Correct answer: 3. V = IR Explanation to Ohm’s Law Correct Form According to Ohm’s law: Electrical current flowing through a resistor is directly proportional to the voltage applied across it. Mathematically: V = IR