Basic Voltage and Current MCQs
Voltage and current are two basic properties which are associated with all electrical circuits and components. In this Electrical Engineering XYZ shares, basic Electrical MCQs on voltage and current which are important for everyone studying in electronics and electrical field.
1. It takes 50 J of energy to move a 5 C charge from point a to point b, the potential difference between point a and b is:
- 250 V
- 10 V
- 5 V
- 500 V
Correct answer: b. 10 V
Explanation: Mathematically, V = W/Q = 50 J/5C = 10 V
2. Cells/batteries are connected in the parallel configuration to increase:
- Current capacity
- Voltage capacity
- Both of these
- None of these
Correct answer: a. Current capacity
3. Solar panels provide:
- dc
- ac
Correct answer: a. dc
4. 1 pound is equal to:
- 2.224 newtons
- 4.448 newtons
- 8.996 newtons
- 36 newtons
Correct answer: b. 4.448 newtons
5. Voltage is measured by using:
- Ammeter
- Voltmeter
- Wattmeter
- None of these
Correct answer: b. Voltmeter
6. Conventional current flow from the _____ terminal to ______ terminal:
- negative, positive
- negative, negative
- positive, negative
- positive, positive
Correct answer: c. positive, negative
7. 240 coulombs of charge pass through a point for 2 minutes, the current is:
- 120 A
- 240 A
- 2 A
- 480 A
Correct answer: c. 2 A
Explanation: I = Q/t = 240 C / (2 * 60 sec) = 2 A
8. tesla is a unit for:
- Magnetic flux
- Magnetic flux density
- Capacitance
- Torque
Correct answer: b. Magnetic flux density
9. Practically, the current flowing through a short circuit is:
- Very high
- Infinite
- Very low
- Zero
Correct answer: a. Very high
Explanation: Practically, a short circuit has very small resistance. From Ohm’s law, the current and resistance are inversely related. So a. is the correct option.
10. The equipment which detects the electric current is:
- Rheostat
- Potentiometer
- Galvanometer
- Alternator
Correct answer: c. Galvanometer