Force on a Wire

The diagram shows a magnet beside a current-carrying wire.

The current in the wire is directed upwards.

In which direction will the force exerted on the wire be directed to?

• A

• B

• C

• D

The diagram shows an electron travelling into a magnetic field generated by two magnets.

What will be the force exerted on the electron the moment it enters the magnetic field?

• downwards

• into the page

• out of the page

• upwards

The diagram shows two wires A and B. Wire A is on a balance while wire B is hung above wire A while being connected to an external circuit.

Wire A has current flowing in it.

When the switch closes, the reading on the balance increases.

Which of the following describe the direction of current in the wires A and B

• wire A leftwards, wire B leftwards

• wire A rightwards, wire B leftwards

• wire A leftwards, wire B rightwards

• wire A rightwards, wire B rightwards

Each diagram shows the cross section through two parallel current-carrying wires.

The current direction has been indicated on each wire.

Which of the following shows the direction of the force exerted on the wires?

• 
• 
• 
• 

The diagram shows three current-carrying wires A, B and C. B is in the midpoint between A and C.

The direction of current in wire B is indicated in the diagram accordingly.

Wire B experiences a force rightwards.

Which of the following options is a possible configuration of the amount of current and direction in wires A and C?

• A

• B

• C

• D