The Diameter of an atom is about: 10-5 m 10-10 m 10-15 m 10-20 m Correct answer: 2. 10-10 m The diameter of an atom is of the order 10-10 m. Usually the diameter of an atom is about 0.1 to 0.5 nanometers (i.e 1 × 10−10 m to 5 × 10−10 m) For Example: Diameter of hydrogen atom … Read more
Copper Loss is constant for which type of DC Generator: Shunt generator Series generator Both of these None of these Correct answer: 3. Both of these Explanation: The copper losses can be expressed mathematically by formula: P = I2R In a generator, the output voltage at the terminal should and must remain constant. To achieve … Read more
Resistance of Copper Wire increases if the: Temperature is increased Temperature is decreased It is doped None of these Correct answer: 1. Temperature is increased The temperature coefficient of copper wire is positive (i.e +0.393) This means if temperature increases by 1 degree then the resistance increases by 0.393%
The resistance of positive temperature coefficient materials: Decrease with an increase in temperature Increases with an increase in temperature Remains constant despite of temperature change None of these Correct answer: 2. Increases with an increase in temperature The resistance of positive temperature coefficient materials increases with an increase in temperature. Copper is an example of … Read more
Electrical Engineering MCQ presents the top 7 MCQ on fundamental concepts of Electrical conduits. Electrical conduit is best defined as: A conductor which carries current A tube that is used to protect and route electrical wiring A signal cable that carries HF signal None of these Correct answer: 2. A tube that is used to protect … Read more
The hysteresis and eddy current losses in the transformer depend on: Supply frequency Maximum flux density in core Both of these None of these Correct answer: 3. Both of these More MCQ on Transformer In a transformer, the energy is conveyed from primary to secondary through Overheating of Transformer Happens Due to Solid earthing a … Read more
A series circuit comprises of ideal resistors and ideal voltage source. If the resistance of resistors is doubled while keeping same source voltage. The voltage across each individual resistance will: Increase Decrease Remain the same None of these Correct answer: 3. Remain the same Explanation: Since the resistance of all resistors is equally increased the … Read more
Which one of following is not an equivalent to watts: Voltage * Current Voltage * Voltage / Resistance Voltage * Voltage / Current Current * Current * Resistance Correct answer: 3. Voltage * Voltage / Current
Which one of the following doesn’t use the heating effect of current: Immersion heater Geyser Vacuum cleaner None of these Correct answer: 3. Vacuum cleaner
How 200 ohms resistors should be connected to obtain an effective resistance of 300 ohms: 2 in series while 3rd in parallel to that series connection 2 in parallel while 3rd in series to that parallel connection Three resistors in series Three resistors in parallel Correct answer: 2. 2 in parallel while 3 in series … Read more