Which of the following materials is a good conductor of electricity?
a) Rubber
b) Wood
c) Copper
d) Glass
Answer: c) Copper
Electric current is measured in:
a) Volts
b) Ohms
c) Watts
d) Amperes
Answer: d) Amperes
The unit of electric charge is:
a) Volt
b) Ampere
c) Ohm
d) Coulomb
Answer: d) Coulomb
Which of the following devices is used to measure electric current?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Galvanometer
Answer: a) Ammeter
What is the SI unit of electric potential difference?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: b) Volt
Which of the following statements is true about electric circuits?
a) Electric current flows from positive to negative terminals.
b) Electric current flows from negative to positive terminals.
c) Electric current flows in both directions simultaneously.
d) Electric current does not flow in a closed circuit.
Answer: b) Electric current flows from negative to positive terminals.
The property of a material that opposes the flow of electric current is called:
a) Conductance
b) Resistance
c) Capacitance
d) Inductance
Answer: b) Resistance
What is the relationship between current, voltage, and resistance in an electric circuit?
a) Ohm’s Law: V = IR
b) Faraday’s Law: E = mc²
c) Boyle’s Law: PV = constant
d) Newton’s Law: F = ma
Answer: a) Ohm’s Law: V = IR
Which of the following is an example of a parallel circuit?
a) A single light bulb connected to a battery.
b) Several light bulbs connected in a series.
c) A combination of series and parallel connections.
d) A closed circuit with no components.
Answer: c) A combination of series and parallel connections.
The phenomenon of a sudden, brief flow of electric current between two conductors is called:
a) Voltage drop
b) Electric shock
c) Electric discharge
d) Electromagnetic induction
Answer: c) Electric discharge
The magnetic field produced by a straight current-carrying wire is:
a) Circular
b) Spherical
c) Cylindrical
d) Linear
Answer: a) Circular
What happens to the strength of the magnetic field around a current-carrying wire when the current is increased?
a) The magnetic field strength decreases.
b) The magnetic field strength remains constant.
c) The magnetic field strength increases.
d) The magnetic field strength becomes zero.
Answer: c) The magnetic field strength increases.
The SI unit of magnetic field strength is:
a) Tesla
b) Ampere
c) Coulomb
d) Ohm
Answer: a) Tesla
Which of the following devices is used to measure magnetic field strength?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Magnetometer
Answer: d) Magnetometer
The phenomenon of generating an electric current in a wire by changing the magnetic field around it is called:
a) Magnetic induction
b) Electric conduction
c) Magnetic deflection
d) Electric discharge
Answer: a) Magnetic induction
The device that converts mechanical energy into electrical energy is called:
a) Battery
b) Generator
c) Transformer
d) Capacitor
Answer: b) Generator
The direction of the magnetic field lines around a straight current-carrying wire can be determined using:
a) Right-hand rule
b) Left-hand rule
c) Thumb rule
d) Index finger rule
Answer: a) Right-hand rule
Which of the following materials is most commonly used as a core in electromagnets?
a) Copper
b) Aluminum
c) Steel
d) Silver
Answer: c) Steel
An electric motor converts:
a) Electrical energy into mechanical energy
b) Mechanical energy into electrical energy
c) Magnetic energy into electrical energy
d) Electrical energy into magnetic energy
Answer: a) Electrical energy into mechanical energy
Which of the following statements is true about the polarity of magnets?
a) Like poles attract each other, and unlike poles repel each other.
b) Like poles repel each other, and unlike poles attract each other.
c) Like poles attract each other, and unlike poles neither attract nor repel.
d) Like poles repel each other, and unlike poles neither attract nor repel.
Answer: b) Like poles repel each other, and unlike poles attract each other.
The magnetic field of a bar magnet is strongest at:
a) The north pole
b) The south pole
c) The center of the magnet
d) The ends of the magnet
Answer: d) The ends of the magnet
Which of the following materials is most commonly used as a permanent magnet?
a) Aluminum
b) Copper
c) Iron
d) Plastic
Answer: c) Iron
What is the relationship between the direction of the electric current in a wire and the direction of the magnetic field it produces?
a) They are parallel to each other.
b) They are perpendicular to each other.
c) They are at a 45-degree angle to each other.
d) There is no relationship between them.
Answer: b) They are perpendicular to each other.
The SI unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Ohm
Answer: b) Watt
Which of the following devices is used to step up or step down the voltage in an electrical circuit?
a) Battery
b) Resistor
c) Transformer
d) Capacitor
Answer: c) Transformer
What happens to the voltage in a series circuit when more resistors are added?
a) The voltage increases.
b) The voltage decreases.
c) The voltage remains the same.
d) The voltage becomes zero.
Answer: b) The voltage decreases.
Which of the following devices is used to store electrical charge?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: b) Capacitor
The phenomenon of producing a voltage in a conductor by changing the magnetic field around it is called:
a) Electric induction
b) Magnetic induction
c) Electromagnetic radiation
d) Magnetic deflection
Answer: b) Magnetic induction
The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction
Answer: c) Electric transmission
Which of the following materials is a good insulator of electricity?
a) Copper
b) Aluminum
c) Plastic
d) Silver
Answer: c) Plastic
The direction of the magnetic field lines around a current-carrying loop of wire can be determined using:
a) Right-hand rule
b) Left-hand rule
c) Thumb rule
d) Index finger rule
Answer: a) Right-hand rule
Which of the following devices is used to protect electrical circuits from excessive current?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor
Answer: c) Fuse
The force exerted on a current-carrying wire placed in a magnetic field is known as:
a) Electric force
b) Magnetic force
c) Electromagnetic force
d) Gravitational force
Answer: b) Magnetic force
The phenomenon of generating an electric current in a coil of wire by changing the magnetic field around it is the principle behind:
a) Electric motors
b) Electric generators
c) Transformers
d) All of the above
Answer: d) All of the above
Which of the following statements is true about the magnetic field inside a solenoid?
a) The magnetic field is strongest at the ends of the solenoid.
b) The magnetic field is weakest at the ends of the solenoid.
c) The magnetic field is uniform throughout the solenoid.
d) The magnetic field depends on the direction of current flow.
Answer: c) The magnetic field is uniform throughout the solenoid.
The device that converts electrical energy into mechanical energy is called:
a) Battery
b) Generator
c) Transformer
d) Motor
Answer: d) Motor
Which of the following statements is true about the magnetic field inside a bar magnet?
a) The magnetic field is strongest at the center of the magnet.
b) The magnetic field is strongest at the ends of the magnet.
c) The magnetic field is weakest at the center of the magnet.
d) The magnetic field is uniform throughout the magnet.
Answer: b) The magnetic field is strongest at the ends of the magnet.
Which of the following materials is most commonly used as an insulator in electrical wires?
a) Copper
b) Aluminum
c) Rubber
d) Silver
Answer: c) Rubber
The strength of an electric field is determined by:
a) The amount of electric charge
b) The distance from the charge
c) The size of the charge
d) All of the above
Answer: d) All of the above
Which of the following devices is used to convert alternating current (AC) to direct current (DC)?
a) Transformer
b) Rectifier
c) Capacitor
d) Inductor
Answer: b) Rectifier
The phenomenon of a sudden, brief flow of electric current between two conductors is called:
a) Voltage drop
b) Electric shock
c) Electric discharge
d) Electromagnetic induction
Answer: c) Electric discharge
The property of a material that opposes the flow of electric current is called:
a) Conductance
b) Resistance
c) Capacitance
d) Inductance
Answer: b) Resistance
The SI unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Ohm
Answer: b) Watt
The device that converts mechanical energy into electrical energy is called:
a) Battery
b) Generator
c) Transformer
d) Capacitor
Answer: b) Generator
Which of the following materials is most commonly used as a core in electromagnets?
a) Copper
b) Aluminum
c) Steel
d) Silver
Answer: c) Steel
What is the relationship between the direction of the electric current in a wire and the direction of the magnetic field it produces?
a) They are parallel to each other.
b) They are perpendicular to each other.
c) They are at a 45-degree angle to each other.
d) There is no relationship between them.
Answer: b) They are perpendicular to each other.
The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction
Answer: c) Electric transmission
Which of the following devices is used to protect electrical circuits from excessive current?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor
Answer: c) Fuse
The force exerted on a current-carrying wire placed in a magnetic field is known as:
a) Electric force
b) Magnetic force
c) Electromagnetic force
d) Gravitational force
Answer: b) Magnetic force
The phenomenon of generating an electric current in a coil of wire by changing the magnetic field around it is the principle behind:
a) Electric motors
b) Electric generators
c) Transformers
d) All of the above
Answer: d) All of the above
The direction of the magnetic field lines around a current-carrying loop of wire can be determined using:
a) Right-hand rule
b) Left-hand rule
c) Thumb rule
d) Index finger rule
Answer: a) Right-hand rule
Which of the following devices is used to store electrical charge?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: b) Capacitor
The device that converts electrical energy into mechanical energy is called:
a) Battery
b) Generator
c) Transformer
d) Motor
Answer: d) Motor
Which of the following statements is true about the magnetic field inside a solenoid?
a) The magnetic field is strongest at the ends of the solenoid.
b) The magnetic field is weakest at the ends of the solenoid.
c) The magnetic field is uniform throughout the solenoid.
d) The magnetic field depends on the direction of current flow.
Answer: c) The magnetic field is uniform throughout the solenoid.
The device that converts mechanical energy into electrical energy is called:
a) Battery
b) Generator
c) Transformer
d) Capacitor
Answer: b) Generator
Which of the following materials is most commonly used as an insulator in electrical wires?
a) Copper
b) Aluminum
c) Rubber
d) Silver
Answer: c) Rubber
The phenomenon of producing a voltage in a conductor by changing the magnetic field around it is called:
a) Electric induction
b) Magnetic induction
c) Electromagnetic radiation
d) Magnetic deflection
Answer: b) Magnetic induction
The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction
Answer: c) Electric transmission
What happens to the voltage in a series circuit when more resistors are added?
a) The voltage increases.
b) The voltage decreases.
c) The voltage remains the same.
d) The voltage becomes zero.
Answer: b) The voltage decreases.
Which of the following devices is used to step up or step down the voltage in an electrical circuit?
a) Battery
b) Resistor
c) Transformer
d) Capacitor
Answer: c) Transformer
The property of a material that opposes the flow of electric current is called:
a) Conductance
b) Resistance
c) Capacitance
d) Inductance
Answer: b) Resistance
The SI unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Ohm
Answer: b) Watt
Which of the following materials is most commonly used as a permanent magnet?
a) Aluminum
b) Copper
c) Iron
d) Plastic
Answer: c) Iron
The strength of an electric field is determined by:
a) The amount of electric charge
b) The distance from the charge
c) The size of the charge
d) All of the above
Answer: d) All of the above
The phenomenon of a sudden, brief flow of electric current between two conductors is called:
a) Voltage drop
b) Electric shock
c) Electric discharge
d) Electromagnetic induction
Answer: c) Electric discharge
The device that converts electrical energy into mechanical energy is called:
a) Battery
b) Generator
c) Transformer
d) Motor
Answer: d) Motor
What is the relationship between the direction of the electric current in a wire and the direction of the magnetic field it produces?
a) They are parallel to each other.
b) They are perpendicular to each other.
c) They are at a 45-degree angle to each other.
d) There is no relationship between them.
Answer: b) They are perpendicular to each other.
The process of transferring electric energy from one place to another without the flow of actual electrons is called:
a) Electric current
b) Electric discharge
c) Electric transmission
d) Electric conduction
Answer: c) Electric transmission
Which of the following devices is used to protect electrical circuits from excessive current?
a) Resistor
b) Capacitor
c) Fuse
d) Transistor
Answer: c) Fuse
The force exerted on a current-carrying wire placed in a magnetic field is known as:
a) Electric force
b) Magnetic force
c) Electromagnetic force
d) Gravitational force
Answer: b) Magnetic force
