Basic Electrical Engineering MCQ for Industrial Extension officer, RRB JE,SSC JE, Electrican, Sub Engineer
1. Ohm’s law is applicable only when
a. Voltage is constant
b. Length is same
c. Cross sectional area is same
d. Temperature is constant…….
2. A tolerance of 20% in the value of carbon resistor is represented by
a. Gold band
b. Black band
c. Silver band
d. Without any band…
3. In a parallel bank with unequal branch resistances
a. The current is highest in the lowest R….
b. The voltage is highest across the lowest K
c. The current is highest in the highest R
d. The current is equal in all branches
4. Which is the best conductor of electricity
a. Carbon
b. Silver….
c. Copper
d. Iron
5. Ten number of 20 ohm resistors are connected in parallel across a 220 V DC supply. The branch current is
a. 20 A
b. 11 A…
c. 22 A
d. 110 A
6. The electron in the last orbit of an atom are called
a. Free electrons
b. Valance electrons…
c. Bound electrons
d. Thermonic electrons
7. Newton-meter is the unit of
a. Energy
b. Torque….
c. Power
d. Work
8. 100 Farad capacitance is obtained by connecting 10 Farad capacitors
a. 10 Nos in series
b. 10 Nos in parallel…
c. 10 Nos in series parallel
d. 100 Nos in series
9. When two resistance are connected in series,they have
a. Same resistance values
b. Same voltage across them
c. Different resistance values
d. Same current passing through them….
10. If a 220 V heater used on 110 V supply, heat produced by it would be
a. One –half
b. Twice
c. One-fourth…
d. Four times