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WorksheetsBasic Electricity
Total questions: 30
Worksheet time: 42mins
Which device is used to control the flow of current in a circuit?
Resistor
Capacitor
Switch
Battery
Which of the following materials is considered a conductor?
Rubber
Glass
Plastic
Copper
What is a characteristic of insulators?
They are highly conductive
They have tightly bound electrons
They require high voltage to operate
They allow free movement of electrons
What are thermocouples primarily used for?
Voltage regulation
Data storage
Current generation
Heat sensing
According to Coulomb's Law, what happens to like charges?
They repel each other
They attract each other
They become neutral
They neutralize
Photovoltaic cells make electricity using what source of energy?
Sound waves
Mechanical force
Wind energy
Sunlight
What does the term 'resistance' refer to in an electrical context?
Generation of voltage
Flow of electrons
Opposition to the flow of current
Strength of magnetic fields
What does a multi-meter measure?
Only voltage
Resistance only
Voltage, current, and resistance
Current and power
What creates voltage in a generator or dynamo?
Static magnetic field
Thermal energy
Chemical reactions
Rotational motion through a magnetic flux
Which type of battery can be recharged multiple times?
Lead cell
Secondary cell
Primary cell
Dry cell
Which electrical component measures voltage?
Ohmmeter
Ammeter
Voltmeter
Thermometer
What type of current flows only in one direction?
Tesla current
Electromagnetic current
Direct current (DC)
Alternating current (AC)
When sunlight hits a photovoltaic cell, what happens to the electrons?
They are frozen in place
They are knocked loose and generate electricity
They condense into a solid
They emit photons
Which of the following is a common example of a primary cell?
Lithium-ion battery
Lead-acid battery
Carbon-zinc battery
Nickel-cadmium battery
What is the unit of measurement used for electric current?
Ohm
Watt
Volt
Ampere
What is the primary component of electricity?
Movement of electrons
Static electricity
Movement of protons
Magnetic fields
What is the correct sequence for the main parts of a circuit?
Control, load, path, source
Load, source, control, path
Path, load, source, control
Source, path, load, control
Which statement is true about electric circuits?
Circuits do not need a power source
Voltage is not required in a circuit
A circuit requires a complete path for current to flow
A circuit can only consist of one component
What is the term used to describe the force that drives current through a circuit?
Static charge
Electromotive force (EMF)
Capacitance
Voltage drop
Which of the following devices is a common source of AC voltage?
Photovoltaic cell
Generator
Thermocouple
Chemical battery
A circuit breaker is designed to protect only people from electric shock, not equipment.
Parallel wiring in residential installations ensures that each device receives the same voltage.
Electrical conduit is used mainly for reducing current loss in long-distance wiring.
The total resistance of conductors connected in series is always less than the smallest individual resistance.
The current is the same at every point in a parallel circuit.
A copper conductor has a resistance of 0.2 Ω per 100 m. If a current of 15 A flows through a 50 m length of the conductor. What is the voltage drop?
(a)
A pump requires a 5 hp motor.
👉 How many watts is this equivalent to?
(a)
A 2 hp motor runs on a 230 V supply. Assume 1 hp = 746 W and efficiency = 100%.
👉 What current does it draw?
(a)
A 60 W bulb operates at 120 V.
👉 What is the resistance of the filament?
(a)
A 1.5 hp motor runs for 4 hours.
👉 How much energy in kilowatt-hours (kWh) does it consume?
(a)
