Podcast
Questions and Answers
What is the name of the rule that describes the direction of the magnetic field around a current-carrying wire?
What is the name of the rule that describes the direction of the magnetic field around a current-carrying wire?
- Ampere's law
- Lenz's law
- Maxwell's right-hand rule (correct)
- Faraday's law
What happens when electric current is passed through a circular wire with iron filings scattered around it?
What happens when electric current is passed through a circular wire with iron filings scattered around it?
- The iron filings are repelled from the wire, creating a visible magnetic field.
- The iron filings form rings around the wire, showing the direction of the magnetic field. (correct)
- The iron filings are attracted to the wire, creating a visible magnetic field.
- The iron filings have no visible effect on the magnetic field around the wire.
What is the relationship between the strength of the magnetic field around a solenoid and the number of turns in the coil of the solenoid?
What is the relationship between the strength of the magnetic field around a solenoid and the number of turns in the coil of the solenoid?
- The strength of the magnetic field is exponentially related to the number of turns in the coil.
- The strength of the magnetic field is directly proportional to the number of turns in the coil. (correct)
- The strength of the magnetic field is independent of the number of turns in the coil.
- The strength of the magnetic field is inversely proportional to the number of turns in the coil.
Which of the following factors does NOT affect the strength of the magnetic field around a solenoid?
Which of the following factors does NOT affect the strength of the magnetic field around a solenoid?
What rule can be used to determine the direction of the magnetic field developed around a current-flowing solenoid?
What rule can be used to determine the direction of the magnetic field developed around a current-flowing solenoid?
What type of material increases the strength of a magnetic field?
What type of material increases the strength of a magnetic field?
Which of the following is NOT a factor that affects the strength of the magnetic field around a solenoid?
Which of the following is NOT a factor that affects the strength of the magnetic field around a solenoid?
What is the unit of magnetic flux?
What is the unit of magnetic flux?
Which physicist is associated with Faraday's Law of Electromagnetic Induction?
Which physicist is associated with Faraday's Law of Electromagnetic Induction?
What is induced when there is a change in magnetic flux linked to a closed circuit?
What is induced when there is a change in magnetic flux linked to a closed circuit?
What is the principle behind electromagnetic induction?
What is the principle behind electromagnetic induction?
What term is used to describe the total number of magnetic lines of force passing through a surface in a magnetic field?
What term is used to describe the total number of magnetic lines of force passing through a surface in a magnetic field?
What is the primary reason for using a soft iron core in a transformer?
What is the primary reason for using a soft iron core in a transformer?
Why is direct current (DC) not suitable for use in a transformer?
Why is direct current (DC) not suitable for use in a transformer?
Why does a ceiling fan not rotate when connected to a solar panel?
Why does a ceiling fan not rotate when connected to a solar panel?
What is the reason for a magnetic compass needle deflecting when placed near a circuit with an electric current?
What is the reason for a magnetic compass needle deflecting when placed near a circuit with an electric current?
Why is an electromagnet used in an electric bell?
Why is an electromagnet used in an electric bell?
What is the principle behind electromagnetic induction in a transformer?
What is the principle behind electromagnetic induction in a transformer?
