Basic Electricity MCQ Test!

25 Questions | By Catherinehalcomb | Updated: Mar 22, 2022 | Attempts: 846

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Welcome to the Basic Electricity MCQ Test! The three most basic components of electricity are voltage, current, and resistance. How much do you know about them and the laws of electricity that bind them together? Well, this quiz will test your knowledge about the topic. All the best!

Questions and Answers

1.

A 6-volt lead-acid battery has an internal resistance of 0.01 ohm. How much current will flow if the battery has a short circuit?
- A.
  
  60A
- B.
  
  600A
- C.
  
  Infinite
- D.
  
  Zero
2.

A binary alloy of copper and zinc.
- A.
  
  Brass
- B.
  
  Bronze
- C.
  
  Alnico
- D.
  
  Steel
3.

The resistance of a conductor when its temperature is increased,
- A.
  
  Increases
- B.
  
  Remain constant
- C.
  
  Varies
- D.
  
  Decreases
4.

A voltage source of 20V is applied across the terminals of a 2.5-ohm rheostat. Calculate the powerdissipated in the rheostat?
- A.
  
  160W
- B.
  
  100W
- C.
  
  150W
- D.
  
  180W
5.

Unit of electrical pressure is
- A.
  
  Volt
- B.
  
  Ohm
- C.
  
  Ampere
- D.
  
  Watt
6.

Two resistors of resistances 5 ohms and 7 ohms are connected in series across a 60-volt source. What isthe power absorbed in the 5-ohm resistor?
- A.
  
  50 watts
- B.
  
  25 watts
- C.
  
  125 watts
- D.
  
  100 watts
7.

When using ohms law, E divided by I would solve for
- A.
  
  Resistance
- B.
  
  Voltage
- C.
  
  Amperage
- D.
  
  Watts
8.

In resistance color coding, red color is assigned to a value
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
9.

An electric iron takes 3 ½ amps. If the heating element has a resistance of 40 ohms, what is its power consumption?
- A.
  
  0.45 kW
- B.
  
  0.49 kW
- C.
  
  0.35 kW
- D.
  
  0.51 kW
10.

Another name for a secondary cell.
- A.
  
  Wet cell
- B.
  
  Storage cell
- C.
  
  Dry cell
- D.
  
  Disposable cell
11.

Two resistances of 8 and 10 ohms respectively are connected in parallel and take a total current of 9 A. What is the current flowing in the 8-ohm resistance?
- A.
  
  5 A
- B.
  
  4 A
- C.
  
  6A
- D.
  
  3 A
- E.
  
  Option 5
12.

What is the resistance must be connected across a 4-ohm resistor in order to give an equivalent resistance of 3 ohms?
- A.
  
  10 ohms
- B.
  
  12 ohms
- C.
  
  8 ohms
- D.
  
  None of these
- E.
  
  Option 5
- F.
  
  Option 6
13.

How is voltmeter connected in a circuit?
- A.
  
  Connect in short circuit across the load
- B.
  
  Connect in shunt across the load
- C.
  
  Connect in series across the load
- D.
  
  Connect in open circuit with the load
- E.
  
  Option 5
- F.
  
  Option 6
14.

Component of an atom that doesn’t have any electrical charge.
- A.
  
  Electron
- B.
  
  Proton
- C.
  
  Neutron
- D.
  
  None of these
- E.
  
  Option 5
- F.
  
  Option 6
15.

A lead-acid cell is constructed in multiple for the purpose of ______.
- A.
  
  Increasing the emf of the cell
- B.
  
  Increasing the capacity of the cell
- C.
  
  Increasing the internal resistance of the cell
- D.
  
  All of these
- E.
  
  Option 5
- F.
  
  Option 6
16.

A measuring instrument used to measure the diameter of circular wires in mills.
- A.
  
  Micrometer
- B.
  
  Millimeter
- C.
  
  Wire gauge
- D.
  
  Milliammeter
17.

The electron in the last orbit of an atom are called
- A.
  
  Bound electrons
- B.
  
  Free electrons
- C.
  
  Valence electrons
- D.
  
  Charged electrons
18.

A 400 MCM cable has 37 strands. What is the diameter if each strand in mills?
- A.
  
  10.81
- B.
  
  1081
- C.
  
  104
- D.
  
  108
19.

The copper field coils of a motor was measured at 21^oC and found to have a resistance of 68 ohms. After the motor has run for a given time, the resistance is found to be 90 ohms. What is the hot temperature of the winding?
- A.
  
  106.36^oC
- B.
  
  166.30^oC
- C.
  
  103.66^oC
- D.
  
  None of these
- E.
  
  Option 5
20.

A secondary cell is charged with a constant current of 10 A for 10 hours. How much charge is accumulated?
- A.
  
  100 coulombs
- B.
  
  360,000 coulombs
- C.
  
  100,000 coulombs
- D.
  
  60,000 coulombs
21.

A cell whose emf is 1.45 V has an internal resistance of 4 ohms. What current will flow if this cell is connected across a 1 ohms resistor?
- A.
  
  0.4 A
- B.
  
  0.2 A
- C.
  
  0.5 A
- D.
  
  0.3 A
- E.
  
  Option 5
- F.
  
  Option 6
22.

What is the diameter of a copper wire having a cross sectional area of 3,969 CM?
- A.
  
  1.6 mm
- B.
  
  7.8 mills
- C.
  
  0.6 inch
- D.
  
  None of these
- E.
  
  Option 5
- F.
  
  Option 6
23.

Which one do When n equal resistors are connected in series to a source of emf E volts, each having a resistance of R ohms, which of the following statements is true? you like?
- A.
  
  The voltage drop across one of the resistor is equal to E/n
- B.
  
  The equivalent resistance of the circuit is equal to nR
- C.
  
  The current through each of the resistor is the same
- D.
  
  All of these
- E.
  
  Option 5
- F.
  
  Option 6
24.

A small light bulb with a resistance of 1000 ohms is connected across a 120-V line. What is the current through the bulb?
- A.
  
  1.2 A
- B.
  
  0.12 A
- C.
  
  0.012 A
- D.
  
  12 A
25.

A wire whose resistance is r ohms is being cut into four equal parts. If these parts are to be connected in parallel, how much is the equivalent resistance in ohms?
- A.
  
  R/12
- B.
  
  R/16
- C.
  
  R/8
- D.
  
  R/4
- E.
  
  Option 5
- F.
  
  Option 6