BASIC ELECTRICITY CONCEPTS
(MCQ)
What is electricity mainly?
A. Flow of heat
B. Flow of sound
C. Flow of light
D. Flow of electric charge
Answer: D
Explanation: Electricity is the movement of electric charge through a conductor.
(MCQ)
What is a circuit?
A. A complete path for current
B. A broken wire
C. A battery only
D. A light bulb only
Answer: A
Explanation: A circuit allows electricity to flow continuously.
(MCQ)
What is a conductor?
A. Material that stops electricity
B. A power source
C. Material that allows electricity to flow
D. A battery type
Answer: C
Explanation: Conductors allow electric charge to move easily.
(True/False)
Higher voltage means more potential energy for electrons.
Answer: True
Explanation: Voltage increases the force pushing charges.
(MCQ)
Why is electricity dangerous?
A. It is always visible
B. It can cause burns or shocks
C. It has color
D. It is cold
Answer: B
Explanation: Electric current can harm the human body.
(True/False)
Electrons are the particles that carry electric charge in most circuits.
Answer: True
Explanation: In metal conductors, electrons are the main charge carriers.
(True/False)
A circuit must include a power source to work.
Answer: True
Explanation: A battery or power supply provides energy.
(True/False)
Rubber is an insulator.
Answer: True
Explanation: Rubber prevents electricity from flowing easily.
(True/False)
Resistance has no effect on current.
Answer: False
Explanation: Resistance directly affects how much current flows.
(MCQ)
What should you do when handling electrical equipment?
A. Use wet hands
B. Ignore safety rules
C. Follow safety procedures
D. Touch exposed wires
Answer: C
Explanation: Safety rules prevent accidents.
(MCQ)
What is an electric current?
A. Flow of electric charge
B. Stored energy
C. Resistance only
D. Magnetic field
Answer:A
Explanation: Current is the rate of flow of charge.
(MCQ)
Which is a power source in a circuit?
A. Resistor
B. Switch
C. Battery
D. Bulb
Answer: C
Explanation: Batteries supply electrical energy.
(MCQ)
What is an insulator?
A. Material that allows current easily
B. Material that resists current flow
C. A type of battery
D. A resistor only
Answer: B
Explanation: Insulators block or reduce electric current.
(MCQ)
What is voltage?
A. Flow of electrons
B. Electrical pressure that pushes current
C. Resistance to flow
D. Light energy
Answer: B
Explanation: Voltage drives electric current through a circuit.
(True/False)
Fuses protect electrical circuits from damage.
Answer: True
Explanation: Fuses break the circuit if current is too high.
(MCQ)
Which device uses electrical energy?
A. Battery
B. Wire
C. Bulb
D. Switch only
Answer: C
Explanation: A bulb converts electrical energy into light and heat.
(MCQ)
What happens when a circuit is open?
A. No current flows
B. Current flows
C. Light increases
D. Resistance disappears
Answer: A
Explanation: An open circuit breaks the flow of electricity.
(MCQ)
Why are wires coated in plastic?
A. To make them heavier
B. To insulate and protect users
C. To increase current
D. To generate electricity
Answer: B
Explanation: Plastic insulation prevents electric shock.
(MCQ)
What is resistance?
A. Opposition to current flow
B. Flow of charge
C. Type of battery
D. Energy output
Answer: A
Explanation: Resistance reduces the flow of electric current.
(MCQ)
What happens if too much current flows?
A. Wires may overheat
B. Circuit becomes brighter
C. Resistance disappears
D. Voltage stops
Answer: A
Explanation: Excess current generates heat and can damage components.
(MCQ)
What is needed for electric current to flow?
A. Open circuit
B. Insulator only
C. Broken wire
D. Closed circuit
Answer: D
Explanation: A closed loop is required for continuous current.
(MCQ)
Which component limits current in a circuit?
A. Battery
B. Wire
C. Switch
D. Resistor
Answer: D
Explanation: Resistors reduce the flow of current.
(MCQ)
Which material is a conductor?
A. Copper
B. Wood
C. Plastic
D. Rubber
Answer: A
Explanation: Copper allows electrons to flow easily.
(MCQ)
What is the unit of electric current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C
Explanation: Current is measured in amperes (A).
(MCQ)
Which device prevents electrical overload?
A. Bulb
B. Fuse
C. Wire
D. Switch
Answer: B
Explanation: Fuses cut off current when it becomes too high.