Electricity MCQ Test ravinder saroha

What is the SI unit of electric current?

• Volt

• Ohm

• Ampere

• Watt

Which of the following materials is a good conductor of electricity?

• Wood

• Plastic

• Rubber

• Copper

What is the formula to calculate electrical power?

• Power = Voltage x Current

• Power = Voltage / Current

• Power = Current / Voltage

• Power = Resistance x Current

Which device is used to measure electric current in a circuit?

• Voltmeter

• Ammeter

• Ohmmeter

• Galvanometer

What is the resistance of a conductor if the voltage across it is 12 volts and the current flowing through it is 4 amperes?

• 48 ohms

• 16 ohms

• 3 ohms

• 8 ohms

Ohm's Law is given by which of the following equations?

• V = IR

• I = VR

• R = VI

• P = IV

Which of the following is a non-conductor of electricity?

• Iron

• Glass

• Aluminium

• Silver

What is the potential difference across a resistor if a current of 2 amperes flows through it and its resistance is 5 ohms?

• 10 volts

• 5 volts

• 2 volts

• 7 volts

Which type of current is supplied to homes and businesses?

• Direct Current (DC)

• Alternating Current (AC)

• Static Electricity

• None of the above

What is the purpose of a fuse in an electrical circuit?

• To provide resistance

• To measure current

• To protect the circuit from overloading

• To store electrical energy