Worksheet Solutions: Electricity Projects - 1 | DIY Science Fun: Cool School Projects - Class 6 PDF Download

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Q1: Electricity primarily travels through ________________.
Ans: Conductors
Conductors are materials through which electricity can flow easily due to the presence of free electrons that can move and carry the electric charge.

Q2: A DC motor is capable of generating electricity when its ________________ rotates.
Ans: Shaft
 The shaft of a DC motor is the rotating component. In the Electric Generator Science Project, when the shaft rotates, it generates electricity through electromagnetic induction.

Q3: LEDs allow the flow of electricity in ________________ direction(s).
Ans: One
LEDs (light emitting diodes) are semiconductor devices that allow the flow of electricity in only one direction. This property is crucial for the functionality of LEDs.

Q4: Renewable sources of electricity include hydro power, wind power, and ________________.
Ans: Solar panels
Solar panels convert sunlight directly into electricity, making them a renewable source of energy.

Q5: In an open circuit, electricity does not ________________.
Ans:  Flow
 In an open circuit, the path for electricity is not complete or is interrupted, preventing the flow of electric current.

Q6: ________________ electricity relies on finite resources like fossil fuels.
Ans: Nonrenewable
Fossil fuels, such as coal and oil, are finite resources and are categorized as nonrenewable sources of electricity.

Q7: Nuclear electricity is produced through controlled nuclear reactions in ________________.
Ans: Nuclear reactors
Controlled nuclear reactions take place in nuclear reactors to produce heat, which is then used to generate electricity.

Q8: An example of static electricity is the attraction between a plastic pipe and small ________________ pieces.
Ans: Paper
The attraction between a plastic pipe and small paper pieces is an example of static electricity. Friction between the plastic and paper transfers charge, resulting in the attraction.

Q9: AC stands for ________________ current.
Ans: Alternating
AC stands for alternating current, where the electric charge changes direction periodically. It is the type of current commonly used in household electrical systems.

Q10: A homemade compass is an example of a science fair project related to ________________.
Ans: Science fair
A homemade compass project related to the behavior of magnetic fields, often demonstrated in science fairs, involves understanding the principles of magnetism and electricity.

Multiple Choice Questions (MCQs):

Q1: Which material is used to rotate the CD wheel in the Electric Generator Science Project?
(a) Rubber band
(b) Copper wire
(c) Wooden stick
(d) Plastic tube
Ans: (a) Rubber band
In the Electric Generator Science Project, a rubber band is used as a belt to rotate the CD wheel, which is a crucial step to demonstrate electricity generation.

Q2: What is the purpose of a pulley in the Electric Generator Science Project?
(a) To generate electricity
(b) To rotate the CD wheel
(c) To hold the LED
(d) To secure the plywood base
Ans: (b) To rotate the CD wheel
The pulley is used to rotate the CD wheel, which is an essential component for generating electricity in the project.

Q3: What is the type of current produced by the DC motor in the Electric Generator Science Project?
(a) Direct current (DC)
(b) Alternating current (AC)
(c) Static current
(d) None of the above
Ans: (a) Direct current (DC)
In this project, the DC motor generates direct current (DC) electricity as its shaft rotates.

Q4: Which source of electricity is considered renewable and sustainable?
(a) Fossil fuels
(b) Solar panels
(c) Nuclear reactors
(d) Coal
Ans: (b) Solar panels
Solar panels harness energy from the sun, which is a renewable and sustainable source of electricity.

Q5: In a closed circuit, electricity:
(a) Flows through the load
(b) Does not flow
(c) Flows in both directions
(d) Flows only on Tuesdays
Ans: (a) Flows through the load
In a closed circuit, the path is complete, allowing electricity to flow and power the load.

True and False

Q1: True/False: A DC motor can be used as a generator to produce electricity. (True/False)
Ans: True
A DC motor can indeed be used as a generator to produce electricity by rotating its shaft.

Q2: True/False: Nonrenewable electricity sources rely on finite resources that can be depleted. (True/False)
Ans: True
Nonrenewable electricity sources like fossil fuels rely on finite resources that can be depleted.

Q3: True/False: Alternating current (AC) flows in only one direction. (True/False)
Ans: False
Alternating current (AC) flows in both directions, rapidly changing its direction over time.

Q4: True/False: An open circuit allows the flow of electricity. (True/False)
Ans: False
In an open circuit, the path for electricity is broken, preventing the flow of electric current.

Q5: True/False: Nuclear electricity is produced by uncontrolled nuclear reactions. (True/False)
Ans: False
Nuclear electricity is produced through controlled nuclear reactions in nuclear reactors, which are regulated and safe.

Short Answer Questions

Q1: Explain the role of a DC motor in the Electric Generator Science Project.
Ans: The DC motor is the essential component of the Electric Generator Science Project. When its shaft rotates, it generates electricity through electromagnetic induction. Conversely, if electricity is supplied to it, it functions as a motor.

Q2: Describe two sources of renewable electricity and their advantages.
Ans: Two sources of renewable electricity are wind power and solar power. Wind turbines convert wind energy into electricity, and solar panels convert sunlight into electricity. The advantages include sustainability, reducing carbon footprint, and lowering dependency on fossil fuels.

Q3: What is the difference between static electricity and current electricity?
Ans: Static electricity is generated through friction, resulting in the transfer of charge between objects. Current electricity involves the flow of electric charge through a conductor. While static electricity is stationary, current electricity is dynamic and flows from high potential to low potential.

Q4: Briefly explain the concept of an open circuit in electricity.
Ans: An open circuit is one where the path for the flow of electricity is incomplete or interrupted. As a result, electricity does not flow, and the connected components do not operate.

Q5: Discuss the safety precautions that should be followed during the Electric Generator Science Project.
Ans: Safety precautions during the Electric Generator Science Project include wearing safety glasses, handling the soldering rod with care, performing the project under supervision, and taking precautions with hot melting glue to avoid burns.

Q6: Define the terms "direct current" and "alternating current."
Ans: Direct current (DC) is the flow of electric charge in one direction, while alternating current (AC) changes direction periodically.

Q7: Name three materials that are good conductors of electricity.
Ans: Good conductors of electricity include copper, aluminum, and gold due to their ability to allow the flow of electric charge with low resistance.

Q8: Explain how a closed circuit is important in our daily lives.
Ans: In our daily lives, closed circuits are important because they allow electricity to flow continuously, enabling our electronic devices and appliances to function.

Q9: What are some potential risks of working with hot melting glue in this project?
Ans: Potential risks of using hot melting glue in the project include burns or injuries if not handled carefully, making it important to exercise caution.

Q10: How does the Electric Generator Science Project inspire an interest in renewable energy?
Ans: The Electric Generator Science Project inspires an interest in renewable energy by demonstrating how a simple setup can generate electricity, encouraging exploration of sustainable energy solutions.