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WorksheetsITI Electrician
Total questions: 20
Worksheet time: 10mins
Which device is used to measure electrical current?
Voltmeter
Ammeter
Ohmmeter
Wattmeter
What is the unit of electrical resistance?
Ohm
Ampere
Volt
Watt
Which component is used to convert AC to DC?
Capacitor
Inductor
Rectifier
Transformer
What is the purpose of earthing in electrical installations?
To prevent shock
To save energy
To increase voltage
To step down current
In an AC circuit, what does the term 'power factor' refer to?
Ratio of true power to apparent power
Ratio of apparent power to true power
Ratio of voltage to current
Ratio of current to voltage
Which of the following is an insulator?
Copper
Aluminum
Glass
Iron
What does a transformer do?
Converts DC to AC
Steps up or steps down voltage
Stores electrical energy
Converts electrical energy to mechanical energy
What is the formula for electrical power?
P = VI
P = IR
P = V/R
P = V^2/R
What is the main purpose of a fuse in an electrical circuit?
To store energy
To protect the circuit from overload
To step down voltage
To rectify AC to DC
Which law states that the total voltage around a closed circuit is equal to the sum of voltage drops within the same circuit?
Ohm's Law
Kirchhoff's Voltage Law
Faraday's Law
Coulomb's Law
What is the principle of an electric motor?
Electromagnetic induction
Electrostatic force
Thermal expansion
Magnetic attraction
In a three-phase system, what is the phase difference between each phase?
90 degrees
120 degrees
180 degrees
60 degrees
What is the typical frequency of the electrical power supply in India?
50 Hz
60 Hz
100 Hz
120 Hz
Which material is commonly used for electrical wiring in homes?
Aluminium
Copper
Gold
Iron
What is the function of a diode in an electrical circuit?
To allow current to flow in one direction only
To store electrical energy
To step down voltage
To increase resistance
Which of the following describes the working principle of a transformer?
Mutual induction
Self induction
Electrolysis
Electromagnetic induction
What is the function of a capacitor in an electrical circuit?
To store electrical charge
To increase resistance
To step up voltage
To convert AC to DC
Which of the following is a non-renewable energy source?
Solar
Wind
Coal
Hydropower
In a DC generator, the function of the commutator is to:
Convert AC to DC
Maintain constant voltage
Reverse the direction of current
Increase current
Which of the following is a type of single-phase motor?
Induction motor
Synchronous motor
Stepper motor
Shaded-pole motor
