Chapter 4.1 Force on a current-carrying conductor

SPM 2013

Diagram shows the direction of movement of a current carrying conductor that is placed between two magnets. Which magnetic field pattern is correct to show the situation

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SPM 2013, Diagram shows a plotting compass placed on a cardboard near the current carrying conductor. Which compass shows the correct direction of the magnetic field?

• A

• B

• C

• D

SPM 2016

Diagram shows a magnetic field pattern. The direction of the magnetic field is determined by using

• Fleming's right hand rule

• Fleming's left hand rule

• Left hand grip rule

• Right hand grip rule

SPM 2016

Diagram shows a permanent magnetic field pattern and magnetic field pattern produced by a current carrying conductor. Which diagram is correct when the current carrying conductor is placed into the permanent magnetic field?

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SPM 2012

Diagram shows a straight conductor placed in a magnetic field. Both of the soft springs extend when the switch is on.

Which change will decrease the extension of the springs?

• Use a stronger magnet

• Use a thicker conductor

• Increase the number of batteries

• Increase the distance between magnets

SPM 2012.

Diagram shows a wire QR hangs freely between two strong magnets. The angle of deflection is increase by

• Increasing the current

• Changing the polarity of the magnet

• increasing the resistance of the wire QR

• Increasing the distance between the pole of the magnet.

Diagram shows two bar magnets, P and Q. hang freely at both end of the solenoid. Which observation is correct when the switch is turned on?

• Magnet P moves away from the solenoid, and magnet Q moves towards the solenoid

• Magnet P moves away from the solenoid, and magnet Q moves away from the solenoid.

• Magnet P moves towards the solenoid, Magnet Q moves towards the solenoid.

• Magnet P move towards the solenoid, and Magnet Q moves away from the solenoid.

Which of the following is the function of the commutator in a direct current motor?

• Change the direction of the current in the coils

• Change the direction of the motion of the coils

• Produce uniform magnetic field

• Increase the speed of rotation of the coils

Diagram shows the flux caused by the magnets. Two straight wire conductors P and Q carrying electric current. They are put in between the magnetic field. Which of the following shows the correct electric field produced?

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Two wires P and Q that are carrying current pass through the cardboard as shown in Diagram. Determine the electric field shown on the top of the cardboard.

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