MCQOPTIONS
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MCQOPTIONS
This section includes 90 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the resistivity of Copper? |
| A. | 1.59*10¯⁸ohm-m |
| B. | 2.7*10¯⁸ohm-m |
| C. | 7.3*10¯⁸ohm-m |
| D. | 5.35*10¯⁸ohm-m |
| Answer» B. 2.7*10¯⁸ohm-m | |
| 2. |
Calculate the ratio of the resistivity of 2 wires having the same length and same resistance with area of cross section 2m² and 5m² respectively. |
| A. | 5:7 |
| B. | 2:7 |
| C. | 2:5 |
| D. | 7:5 |
| Answer» D. 7:5 | |
| 3. |
The resistance of insulators __________ |
| A. | Increases with an increase in temperature |
| B. | Decreases with an increase in temperature |
| C. | Remains the same with an increase in temperature |
| D. | Becomes zero with an increase in temperature |
| Answer» C. Remains the same with an increase in temperature | |
| 4. |
Which of the following is not an expression power? |
| A. | P=VI |
| B. | P=I²R |
| C. | P=V²/R |
| D. | P=I/R |
| Answer» E. | |
| 5. |
A wire of length 2m and another wire of length 5m are made up of the same material and have the same area of cross section, which wire has higher resistance? |
| A. | Both have equal resistance |
| B. | The 2m wire has higher resistance |
| C. | The 5m wire has higher resistance |
| D. | The value of resistance cannot be determined from the given data |
| Answer» D. The value of resistance cannot be determined from the given data | |
| 6. |
Out of the following, which one is not a source of electrical energy? |
| A. | Solar cell |
| B. | Battery |
| C. | Potentiometer |
| D. | Generator |
| Answer» D. Generator | |
| 7. |
The SI unit of power is? |
| A. | kW(kilo-watt) |
| B. | J/s(joules per second) |
| C. | Ws(watt-second) |
| D. | J/h(joules per hour |
| Answer» C. Ws(watt-second) | |
| 8. |
The resistance of pure metals ___________ |
| A. | Increases with an increase in temperature |
| B. | Decreases with an increase in temperature |
| C. | Remains the same with an increase in temperature |
| D. | Becomes zero with an increase in temperature |
| Answer» B. Decreases with an increase in temperature | |
| 9. |
The temperature of a coil cannot be measured by which of the following methods? |
| A. | Thermometer |
| B. | Increase in resistance of the coil |
| C. | Thermo-junctions embedded in the coil |
| D. | Calorimeter |
| Answer» E. | |
| 10. |
Which is the most cost efficient connection? |
| A. | Series |
| B. | Parallel |
| C. | Either series or parallel |
| D. | Neither series nor parallel |
| Answer» B. Parallel | |
| 11. |
In a _________ circuit, the total resistance is greater than the largest resistance in the circuit. |
| A. | Series |
| B. | Parallel |
| C. | Either series or parallel |
| D. | Neither series nor parallel |
| Answer» B. Parallel | |
| 12. |
KCL deals with the conservation of? |
| A. | Momentum |
| B. | Mass |
| C. | Potential Energy |
| D. | Charge |
| Answer» E. | |
| 13. |
Calculate the current A. |
| A. | 5A |
| B. | 10A |
| C. | 15A |
| D. | 20A |
| Answer» D. 20A | |
| 14. |
Calculate the value of I3, if I1= 2A and I2=3A. |
| A. | -5A |
| B. | 5A |
| C. | 1A |
| D. | -1A |
| Answer» B. 5A | |
| 15. |
A bulb has a power of 200W. What is the energy dissipated by it in 5 minutes? |
| A. | 60J |
| B. | 1000J |
| C. | 60kJ |
| D. | 1kJ |
| Answer» D. 1kJ | |
| 16. |
Calculate the voltage across the 10 ohm resistor. |
| A. | 12V |
| B. | 4V |
| C. | 10V |
| D. | 0V |
| Answer» C. 10V | |
| 17. |
Calculate the power across each 20 ohm resistance. |
| A. | 1000W, 1000W |
| B. | 500W, 500W |
| C. | 1000kW, 1000kW |
| D. | 500kW, 500kW |
| Answer» C. 1000kW, 1000kW | |
| 18. |
Find the value of the currents I1 and I2. |
| A. | 0.3, 0.1 |
| B. | -0.1, -0.3 |
| C. | -0.3, -0.1 |
| D. | 0.1, 0.2 |
| Answer» E. | |
| 19. |
In a series circuit, which of the parameters remain constant across all circuit elements such as resistor, capacitor and inductor etcetera?If there are two bulbs connected in series and one blows out, what happens to the other bulb? |
| A. | VoltageThe other bulb continues to glow with the same brightness |
| B. | CurrentThe other bulb stops glowing |
| C. | Both voltage and currentThe other bulb glows with increased brightness |
| D. | Neither voltage nor currentThe other bulb also burns out |
| Answer» C. Both voltage and currentThe other bulb glows with increased brightness | |
| 20. |
A wire has the same resistance as the one given in the figure. Calculate its resistivity if the length of the wire is 10m and its area of cross section is 2m. |
| A. | 16 ohm-metre |
| B. | 8 ohm-metre |
| C. | 16 kiloohm-metre |
| D. | 8 kiloohm-metre |
| Answer» C. 16 kiloohm-metre | |
| 21. |
Calculate the energy in the 10 ohm resistance in 10 seconds. |
| A. | 400J |
| B. | 40kJ |
| C. | 4000J |
| D. | 4kJ |
| Answer» C. 4000J | |
| 22. |
If the current through x ohm resistance in the circuit is 5A, find the value of x. |
| A. | 27 ohm |
| B. | 5 ohm |
| C. | 12 ohm |
| D. | 135 ohm |
| Answer» B. 5 ohm | |
| 23. |
Calculate the total current in the circuit. |
| A. | 20 A |
| B. | 10 A |
| C. | 11.43 A |
| D. | 15 A |
| Answer» D. 15 A | |
| 24. |
Calculate the equivalent resistance between A and B. |
| A. | 6.67 ohm |
| B. | 46.67 ohm |
| C. | 26.67 ohm |
| D. | 10.67 ohm |
| Answer» B. 46.67 ohm | |
| 25. |
Calculate the equivalent resistance between A and B. |
| A. | 2 ohm |
| B. | 4 ohm |
| C. | 6 ohm |
| D. | 8 ohm |
| Answer» C. 6 ohm | |
| 26. |
Many resistors connected in series will? |
| A. | Divide the voltage proportionally among all the resistors |
| B. | Divide the current proportionally |
| C. | Increase the source voltage in proportion to the values of the resistors |
| D. | Reduce the power to zero |
| Answer» B. Divide the current proportionally | |
| 27. |
A voltage across a series resistor circuit is proportional to? |
| A. | The amount of time the circuit was on for |
| B. | The value of the resistance itself |
| C. | The value of the other resistances in the circuit |
| D. | The power in the circuit |
| Answer» C. The value of the other resistances in the circuit | |
| 28. |
If two bulbs are connected in parallel and one bulb blows out, what happens to the other bulb? |
| A. | The other bulb blows out as well |
| B. | The other bulb continues to glow with the same brightness |
| C. | The other bulb glows with increased brightness |
| D. | The other bulb stops glowing |
| Answer» C. The other bulb glows with increased brightness | |
| 29. |
Which among the following is an expression for energy? |
| A. | V²It |
| B. | V²Rt |
| C. | V²t/R |
| D. | V2t²/R |
| Answer» D. V2t²/R | |
| 30. |
Calculate the power in the 20 ohm resistance. |
| A. | 2000kW |
| B. | 2kW |
| C. | 200kW |
| D. | 2W |
| Answer» C. 200kW | |
| 31. |
What is the basic law that has to be followed in order to analyze the circuit? |
| A. | Newton’s laws |
| B. | Faraday’s laws |
| C. | Ampere’s laws |
| D. | Kirchhoff’s law |
| Answer» E. | |
| 32. |
What is the value of current if a 50C charge flows in a conductor over a period of 5 seconds? |
| A. | 5A |
| B. | 10A |
| C. | 15A |
| D. | 20A |
| Answer» C. 15A | |
| 33. |
The total resistance between A and B are? |
| A. | 20 ohm |
| B. | 5 ohm |
| C. | 80 ohm |
| D. | 0 ohm |
| Answer» C. 80 ohm | |
| 34. |
Kilowatt-hour(kWh) is a unit of? |
| A. | Current |
| B. | Power |
| C. | Energy |
| D. | Resistance |
| Answer» D. Resistance | |
| 35. |
Calculate the total resistance between the points A and B. |
| A. | 7 ohm |
| B. | 0 ohm |
| C. | 7.67 ohm |
| D. | 0.48 ohm |
| Answer» D. 0.48 ohm | |
| 36. |
A battery converts___________ |
| A. | Electrical energy to chemical energy |
| B. | Chemical energy to electrical energy |
| C. | Mechanical energy to electrical energy |
| D. | Chemical energy to mechanical energy |
| Answer» C. Mechanical energy to electrical energy | |
| 37. |
A wire having an area of cross section = 10sqm and another wire having an area of cross section= 15sqm, have the same length and are made up of the same material. Which wire has more resistance? |
| A. | Both have equal resistance |
| B. | The 10sqm wire has higher resistance |
| C. | The 15sqm wire has higher resistance |
| D. | The value of resistance cannot be determined from the given data |
| Answer» C. The 15sqm wire has higher resistance | |
| 38. |
A copper coil has a resistance of 200 ohms when its mean temperature is 0 degree centigrade. Calculate the resistance of the coil when its mean temperature is 80 degree centigrade. Temperature coefficient of copper is 0.004041 centigrade¯¹. |
| A. | 264.65 ohm |
| B. | 264.65 kilo-ohm |
| C. | 286.65 ohm |
| D. | 286.65 kilo-ohm |
| Answer» B. 264.65 kilo-ohm | |
| 39. |
It is preferable to connect bulbs in series or in parallel? |
| A. | Series |
| B. | Parallel |
| C. | Both series and parallel |
| D. | Neither series nor parallel |
| Answer» C. Both series and parallel | |
| 40. |
The voltage across the open circuit is? |
| A. | 100V |
| B. | Infinity |
| C. | 90V |
| D. | 0V |
| Answer» B. Infinity | |
| 41. |
A 250V bulb passes a current of 0.3A. Calculate the power in the lamp. |
| A. | 75W |
| B. | 50W |
| C. | 25W |
| D. | 90W |
| Answer» B. 50W | |
| 42. |
Practically, if 10kJ of energy is supplied to a device, how much energy will the device give back? |
| A. | Equal to10kJ |
| B. | Less than 10kJ |
| C. | More than 10kJ |
| D. | Zero |
| Answer» C. More than 10kJ | |
| 43. |
Calculate the energy in the 5 ohm resistor in 20 seconds. |
| A. | 21.5kJ |
| B. | 2.15kJ |
| C. | 2.15J |
| D. | 21.5kJ |
| Answer» C. 2.15J | |
| 44. |
Calculate the energy dissipated by the circuit in 50 seconds. |
| A. | 50kJ |
| B. | 50J |
| C. | 100j |
| D. | 100kJ |
| Answer» B. 50J | |
| 45. |
Which of the following statements are true? |
| A. | Power is proportional to voltage only |
| B. | Power is proportional to current only |
| C. | Power is neither proportional to voltage nor to the current |
| D. | Power is proportional to both the voltage and current |
| Answer» E. | |
| 46. |
Find the value of i2, i4 and i5 if i1=3A, i3=1A and i6=1A. |
| A. | 2,-1,2 |
| B. | 4,-2,4 |
| C. | 2,1,2 |
| D. | 4,2,4 |
| Answer» B. 4,-2,4 | |
| 47. |
Which of the following statements are true with regard to resistance? |
| A. | Resistance is directly proportional to a length of the wire |
| B. | Resistance is directly proportional to an area of cross section of the wire |
| C. | Resistance is inversely proportional to the length of the wire |
| D. | Resistance is inversely proportional to the resistivity of the wire |
| Answer» B. Resistance is directly proportional to an area of cross section of the wire | |
| 48. |
A current of 5A flows in a resistor of 2 ohms. Calculate the energy dissipated in 300 seconds in the resistor. |
| A. | 15kJ |
| B. | 15000kJ |
| C. | 1500J |
| D. | 15J |
| Answer» B. 15000kJ | |
| 49. |
In a parallel circuit, with a number of resistors, the voltage across each resistor is ________ |
| A. | The same for all resistors |
| B. | Is divided equally among all resistors |
| C. | Is divided proportionally across all resistors |
| D. | Is zero for all resistors |
| Answer» B. Is divided equally among all resistors | |
| 50. |
Calculate the work done in a resistor of 20 ohm carrying 5A of current in 3 hours. |
| A. | 1.5J |
| B. | 15J |
| C. | 1.5kWh |
| D. | 15kWh |
| Answer» D. 15kWh | |