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

Fill in the Blanks

Q1: Electromagnets possess a magnetic force when an __________ is present.
Ans: electric current

Q2: In the Electromagnet Science Project, what type of wire is used for winding around the iron bolt?
Ans: Insulated copper wire

Q3: The magnetic substance, such as a paperclip, is attracted to the electromagnetic field, demonstrating the successful creation of a __________ magnet.
Ans: homemade

Q4: Electromagnets play a crucial role in lifting and transporting large containers in __________.
Ans: shipping ports

Q5: __________ are devices that convert electric energy into sound energy.
Ans: Headphones and loudspeakers

Q6: To create contact points, remove some insulation at __________ ends of the wire.
Ans: opposite

Q7: The metal bolt or iron nail wound with wire serves as the __________ of the electromagnet.
Ans: base

Q8: Increasing the number of windings of the insulated copper wire around the base enhances the magnet's __________.
Ans: magnetic force

Q9: __________ magnets have their own magnetic field and retain their magnetism without external forces.
Ans: Permanent

Q10: Safety glasses should be worn to protect your __________ during the experiment.
Ans: eyes

Multiple Choice Questions

Q1: What type of magnet is created in the Electromagnet Science Project?
(a) Permanent magnet
(b) Temporary magnet
(c) Electromagnet
(d) Alnico magnet
Ans: (c) Electromagnet
The Electromagnet Science Project creates an electromagnet, which is a type of magnet that possesses magnetic force when an electric current is present.

Q2: Which material is wound with insulated copper wire to create an electromagnet in the project?
(a) Plastic bolt
(b) Iron nail
(c) Wooden stick
(d) Aluminum foil
Ans: (b) Iron nail
An iron nail (or iron bolt) is wound with insulated copper wire to create the electromagnet in the project.

Q3: What does the presence of a switch in the Electromagnet Science Project allow you to do?
(a) Increase the number of windings
(b) Change the type of wire
(c) Easily turn the circuit on and off
(d) Create a permanent magnet
Ans: (c) Easily turn the circuit on and off
The switch in the project allows you to easily turn the circuit on and off, making the project more interactive and controllable.

Q4: What happens when you bring a magnetic substance near the electromagnet in the project?
(a) The electromagnet becomes demagnetized.
(b) The magnetic substance becomes electrified.
(c) The magnetic substance is attracted to the electromagnet.
(d) The electromagnet loses its copper wire.
Ans: (c) The magnetic substance is attracted to the electromagnet.
When you bring a magnetic substance, such as a paperclip, near the electromagnet, it is attracted to the electromagnet, demonstrating the creation of a magnetic field.

Q5: What type of magnet is a coin that becomes magnetized when brought close to a magnet?
(a) Permanent magnet
(b) Electromagnet
(c) Temporary magnet
(d) Alnico magnet
Ans: (c) Temporary magnet
A coin that becomes magnetized when brought close to a magnet is an example of a temporary magnet. It possesses magnetic properties for a short time.

True and False

Short Answer Questions

Q1: Explain the role of the insulated copper wire wound around the iron nail in the creation of the electromagnet.
Ans: The insulated copper wire wound around the iron nail serves as the coil through which an electric current flows. When an electric current passes through the coil, it creates a magnetic field around the coil, effectively turning the iron nail into a magnet. This magnetic field allows the electromagnet to attract magnetic substances, such as paperclips, demonstrating the creation of a homemade magnet.

Q2: Describe one practical application of an electromagnet in everyday life.
Ans: One practical application of an electromagnet in everyday life is in electric doorbells. In electric doorbells, an electromagnet is used to produce the ringing sound. When the doorbell button is pressed, it completes an electric circuit, allowing an electric current to flow through the coil of the electromagnet. This generates a magnetic field that attracts a metal hammer. The hammer strikes a bell, creating the ringing sound. When the button is released, the circuit is interrupted, and the electromagnet's magnetic force is deactivated, causing the hammer to return to its original position. This application demonstrates how electromagnets can be used for signaling and alerting purposes.

Q3: Why is the presence of a switch recommended in the Electromagnet Science Project?
Ans: The presence of a switch in the Electromagnet Science Project is recommended to easily control the flow of electric current to the electromagnet. It allows you to turn the circuit on and off without the need to disconnect or reconnect wires manually. This convenience enhances the interactivity of the project and ensures safety by quickly deactivating the electromagnet when needed. The switch simplifies the operation of the experiment and provides a better understanding of the relationship between the presence of electric current and the magnetic properties of the electromagnet.

Q4: Briefly explain the difference between a permanent magnet and an electromagnet.
Ans: The primary difference between a permanent magnet and an electromagnet is in their magnetic properties. A permanent magnet is a magnet that possesses its own magnetic field and retains its magnetism without the influence of external forces. It does not require an external power source to maintain its magnetic properties. In contrast, an electromagnet is a magnet that exhibits magnetic force only when an electric current is present. It relies on the flow of electric current through a coil of wire to generate a magnetic field. When the electric current is turned off, the magnetic force of an electromagnet is deactivated, distinguishing it from permanent magnets. Electromagnets offer the advantage of controllability and versatility, as their magnetic properties can be easily manipulated by adjusting the electric current.

Q5: What safety precautions should be taken when conducting the Electromagnet Science Project?
Ans: When conducting the Electromagnet Science Project, several safety precautions should be taken:

• Wear safety glasses to protect your eyes from potential hazards, such as sparks or flying debris.
• Handle sharp tools like knives with care to prevent accidental cuts or injuries.
• Exercise caution when using a soldering iron to avoid burns; if you're not experienced with soldering, seek guidance from an adult.
• Perform the project under the supervision of a parent, teacher, or responsible adult to ensure safety and proper handling of materials.
• Avoid placing the electromagnet near electronic devices or sensitive equipment that could be affected by its magnetic field.
• Following these safety precautions will help ensure a safe and enjoyable experience while conducting the experiment.