1. With the rise in temperature the resistance of carbon
- decreases
- increases
- remain constant
- none of the above
Answer: 1
2. When number of capacitors are connected in series, then the equivalent capacitance is
- increases
- decreases
- remain same
- none of the above
Answer: 2
3. Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law?
- Capacitors
- Inductors
- Transistors
- Resistance
Answer: 3
Explanation: Ohm’s law cannot be used for unilateral networks as such networks only allow current flow in one direction. Transistor forms a unilateral network. Thus, Ohm’s law cannot be used on Transistors.
4. According to the fundamentals of electrical engineering, which of these is a correct representation of peak value in an AC Circuit?
- RMS value/Peak factor
- RMS value*Form factor
- RMS value/Form factor
- RMS value*Peak factor
Answer: 4
Explanation: A peak factor in an AC circuit represents the ratio of the peak value to the RMS value. The peak factor also called the crest factor indicates how extreme the peaks are present in a waveform.
5. How many cycles will an AC signal make in 2 seconds if its frequency is 100 Hz?
- 200
- 150
- 100
- 50
Answer: 1
Explanation: In electrical engineering, the frequency represents the ratio of the number of cycles to the total time. Since frequency is given as 100 Hz and the time is 2 sec thus a total of 200 cycles will be made.
6. Which of the following is correct about the power consumed by R1 and R2 connected in series if the value of R1 is greater than R2?
- R1 will consume more power
- R2 will consume more power
- R1 and R2 will consume the same power
- The relationship between the power consumed cannot be established
Answer: 1
Explanation: In the introduction to electrical engineering it is explained that the power can be expressed as P = I2*R. When two resistors are connected in series the current flowing through the resistors is the same and thus, power consumed by the larger resistor will be more.
7. What kind of quantity is an Electric potential?
- Dimensionless quantity
- Tensor quantity
- Vector quantity
- Scalar quantity
Answer: 4
Explanation: Electric potential refers to the work done to bring a unit positive charge from a point with higher potential to a point with lower potential. Since electric potential only has magnitude but no direction, it is a scalar quantity.
8. Who defined electric current and devised a method to measure current?
- Andre-Marie Ampere
- Nikola Tesla
- Alessandro Antonio Volta
- Michael Faraday
Answer: 1
Explanation: Andre-Marie Ampere is a French physicist and mathematician who defined electric current and devised a method to measure current in the 1820s.
9. An inductor is a device which store energy in the form of
- magnetic field
- electric field.
- both electric and magnetic field.
- voltage and current.
Answer: 1
10. A capacitor is a device designed to store energy in the
- magnetic field
- electric field.
- both electric and magnetic field.
- plates
Answer: 2
