Question 1: Two resistors 4Ω and 6Ω are connected in series circuit which is powered by 12 volts power source. What is the voltage across 6Ω resistor?
- 7.2 volts
- 4.8 volts
- 6.8 volts
- 5.2 volts
NEC CODE
NEC 2023
Resistor Practice Quiz Questions
Free Online Resistor Quiz Questions
TOPICS COVERED
Electrical Practice Questions
How this test works
Read each question carefully
Look for absolute words like always / never — they often distinguish the right answer.
Manage your time
You have 18 min for 11 questions. Skip tough ones and come back.
Progress is auto-saved
Your answers are saved locally — a page refresh won't lose your work.
Review your answers
After submitting you'll see every explanation and your NEC references.
Frequently Asked Questions
Yes — free, no signup required. Each question links to the relevant NEC article so you can study the code directly.
The National Electrical Code (NFPA 70) is the benchmark standard for safe electrical installation in the US. It is updated every 3 years by the NFPA.
Study the edition adopted by your state. As of 2025, most states use the 2020 or 2023 NEC. These tests are written to the 2023 edition.
The most tested articles are 100 (Definitions), 200–250 (Wiring & Grounding), 300–314 (Wiring Methods), 400–411 (Conductors), 430 (Motors), and 700–701 (Emergency Systems).
11
Questions
18 min
Time
70%
Pass
Timer starts immediately. Progress is auto-saved.
0
Correct0
Wrong0s
TimeResistor Practice Quiz Questions — Question List
Question 2: A lamp operating at 120 volts has a resistance of 480 ohms. What is the wattage of the lamp?
- 25 Watts
- 30 Watts
- 28 Watts
- 45 Watts
Question 3: A circuit consists of two parallel resistors of each 4 ohms are connected in series with a group of two parallel resistors or 2 ohms respectively. What is the equivalent resistance of the circuit?
- 6 ohms
- 3 ohms
- 12 ohms
- 8 ohms
Question 4: If four 2 ohms resistors are connected in parallel. What is the equivalent resistance of the circuit?
- 4 ohms
- 0.5 ohms
- 2 ohms
- 1 ohm
Question 5: Four resistors of 2, 5, 8 and 9 ohms respectively are connected in series in a circuit. What must be the battery potential to drive 1 ampere current through the circuit.
- 24 volts
- 12 volts
- 20 volts
- 16 volts
Question 6: A 12 volts battery is connected group of four parallel resistors each with 4 ohms. How much current does the circuit draws from the battery?
- 12 amperes
- 18 amperes
- 6 amperes
- 10 amperes
Question 7: A lamp is operating at 120 volts has a resistance 60 ohms. How much current in ampere the lamp does draws?
- 2 ohms
- 0.5 ohms
- 1 ohm
- 4 ohms
Question 8: If two identical resistors are connected in parallel and series combination. What is the ratio between parallel and series combination?
- 1/4
- 4
- 1/2
- 2
Question 9: A 10 meter length of an electrical wire connects the power source and load. Due to fault some part of the wire has damaged and removed and connected back between power source and load. What will be the ampere current flow in the wire?
- increases
- decreases
- remains same.
Question 10: Which of the electrical quantity is same in parallel connection of two wires with different resistance values?
- voltage
- current
- frequency
- power
Question 11: A 40 watt electrical lamp draws 2 amperes current. What is the resistance offered by the lamp?
- 0.25 ohms
- 10 ohms
- 4 ohms
- 1 ohm
Student Reviews
No reviews yet — be the first to share your experience!
Leave a Review