Q1: Electric motors convert __________ energy into __________ energy.
Q2: The flow of electric charge is known as __________.
Q3: In an electric motor, a __________ field is used to produce rotational motion.
Q4: The purpose of safety pins in the electric motor project is to __________ the magnets in place.
Q5: Insulated copper wire is used to ensure that __________ flows efficiently through the wire.
Q6: The unit of electric current is __________.
Q7: A device that maintains a constant voltage in an electric circuit is called a __________.
Q8: The SI unit of electric power is __________.
Q9: __________ is a good conductor of electricity.
Q10: __________ is used to break an electric circuit.
Q1: What is the function of a commutator in an electric motor?
(a) To supply power
(b) To reverse the direction of current
(c) To increase resistance
(d) To decrease resistance
Q2: Which of the following is a good insulator of electricity?
(a) Copper
(b) Aluminum
(c) Plastic
(d) Silver
Q3: What happens to the resistance in a conductor as its temperature increases?
(a) Resistance decreases
(b) Resistance remains constant
(c) Resistance increases
(d) Resistance becomes zero
Q4: The flow of electric charge is measured in:
(a) Amperes
(b) Volts
(c) Watts
(d) Ohms
Q5: What is the purpose of a fuse in an electric circuit?
(a) To increase current
(b) To decrease resistance
(c) To break the circuit in case of excessive current
(d) To regulate voltage
Q2: True/False: An electromagnet loses its magnetism when the electric current is switched off.
Q3: True/False: Voltage is the force that pushes electric current through a conductor.
Q4: True/False: Parallel circuits offer only one pathway for the electric current to flow.
Q5: True/False: Resistance in a circuit is measured in ohms.
Q1: Explain the concept of electromagnetism and its applications.
Q2: Describe the difference between series and parallel circuits.
Q3: What is Ohm's Law, and how is it represented mathematically?
Q4: How does an electric motor work, and what are its key components?
Q5: Define electric power and its SI unit. How is it calculated in a circuit?
Q6: Discuss the safety precautions one should take while working with electricity.
Q7: Explain how a simple electric motor operates, detailing the role of each component.
Q8: Describe the process of generating electricity in a power plant.
Q9: What are conductors and insulators in terms of electricity? Provide examples of each.
Q10: Discuss the advantages and disadvantages of using electricity as a source of energy.
You can access the solutions to this worksheet here.
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