G10 Phy Ch15

What is electromagnetism?

• A) The study of electric current
• B) The study of magnetic effects of current
• C) The study of electric and magnetic fields
• D) The study of electric motors

What are motors and electric meters based on?

• A) Electric fields
• B) Magnetic fields
• C) Both electric and magnetic fields
• D) None of the above

What is the name of the scientist who discovered that a current passing through a conductor produces a magnetic field around it?

• A) Michael Faraday
• B) André-Marie Ampère
• C) James Clerk Maxwell
• D) Isaac Newton

What is the direction of the magnetic field around a conductor governed by?

• A) The direction of the current flowing through the conductor
• B) The direction of the voltage applied to the conductor
• C) The direction of the resistance of the conductor
• D) The direction of the temperature of the conductor

What is the Right Hand Grip Rule used for?

• A) To find the direction of the magnetic field around a conductor
• B) To find the direction of the electric field around a conductor
• C) To find the direction of the force on a current-carrying wire in a magnetic field
• D) To find the direction of the torque on a current-carrying loop in a magnetic field

What is a solenoid?

• A) A device that produces an electric field
• B) A device that produces a magnetic field
• C) A device that produces both electric and magnetic fields
• D) A device that produces no electric or magnetic fields

What happens when a current-carrying solenoid is brought close to a suspended bar magnet?

• A) The north pole of the magnet repels the north pole of the solenoid
• B) The north pole of the magnet attracts the north pole of the solenoid
• C) The south pole of the magnet repels the north pole of the solenoid
• D) The south pole of the magnet attracts the north pole of the solenoid

What is the direction of the force on a current-carrying wire in a magnetic field according to Fleming's left hand rule?

• A) In the same direction as the current
• B) In the opposite direction as the current
• C) Perpendicular to both the direction of the current and the magnetic field
• D) Parallel to both the direction of the current and the magnetic field

What happens when a rectangular coil of wire is placed between the two poles of a permanent magnet and a current is passed through it?

• A) The coil becomes stationary
• B) The coil rotates due to the torque acting on it
• C) The magnetic field around the coil disappears
• D) The current passing through the coil reverses direction

What is the name of the principle that electric motors work on?

• A) Ampère's principle
• B) Faraday's principle
• C) Fleming's principle
• D) Newton's principle