WorksheetsUnderstanding Electrical Technology Concepts
Total questions: 15
Worksheet time: 8mins
What is the unit of electrical resistance?
Ampere
Ohm
Volt
Watt
Which of the following is a safety device used to prevent electrical overloads?
Resistor
Capacitor
Circuit Breaker
Transformer
In a DC circuit, what is the relationship between voltage (V), current (I), and resistance (R)?
V=I×R
V=I+R
V=I−R
V=I/R
What is the primary source of energy in a coal-fired power station?
Nuclear
Solar
Chemical
Wind
Which of the following materials is commonly used as a conductor in electrical circuits?
Rubber
Glass
Copper
Wood
What is the frequency of the AC mains supply in Great Britain?
50 Hz
60 Hz
100 Hz
120 Hz
Which law states that the induced electromotive force in any closed circuit is equal to the rate of change of the magnetic flux through the circuit?
Ohm's Law
Faraday's Law
Coulomb's Law
Kirchhoff's Law
What is the main purpose of an earth wire in electrical installations?
To provide power
To prevent electrical shock
To increase voltage
To reduce current
Which of the following is a characteristic of a parallel circuit?
The current is the same through all components
The voltage is the same across all components
The resistance is the same across all components
The power is the same across all components
What is the unit of electric power?
Joule
Newton
Watt
Coulomb
Which of the following is a renewable source of energy?
Coal
Natural Gas
Wind
Oil
What is the effect of increasing the number of turns in a coil on the induced electromotive force?
It decreases
It remains the same
It increases
It becomes zero
Which component is used to store electrical energy in an electric field?
Resistor
Inductor
Capacitor
Transformer
What is the typical voltage of a household electrical outlet in Great Britain?
110 V
120 V
230 V
240 V
Which of the following describes the relationship between electricity and magnetism?
Coulomb's Law
Newton's Law
Electromagnetism
Thermodynamics
