CIE iGCSE Co-Ordinated Science P4.5.4 Force on a current-carrying conductor Exam Style Questions Paper 2
Question
A current-carrying wire is placed between the poles of a magnet, as shown.
The current direction in the wire is shown.
A force is produced on the wire.
In which labelled direction does the force act?
▶️Answer/Explanation
Ans: B
Question
The diagram shows a wire in a magnetic field. There is a current in the wire in the direction shown. The direction of the magnetic field is also shown.
The magnetic field causes a force on the wire.
In which direction does this force act?
A into the page
B out of the page
C towards the bottom of the page
D towards the top of the page
▶️Answer/Explanation
Ans :A
Question
The diagram shows a wire carrying an electric current in the direction shown. The wire is at right angles to a magnetic field that is directed into the page. A force acts on the wire because of the current and the magnetic field.
In which labelled direction does this force act?
A A
B B
C C
D D
▶️Answer/Explanation
Answer: B
Explanation: According to Fleming’s Left-Hand Rule, the force on a current-carrying wire in a magnetic field is perpendicular to both the current and the magnetic field. In this case, the force acts in direction B.
Question
The diagram shows a current-carrying conductor between the poles of a magnet. The direction of the current is shown.
In which direction is the force that acts on the wire?
A. into the page
B. out of the page
C. to the left
D. to the right
▶️Answer/Explanation
Answer: A
Explanation: Using Fleming’s Left-Hand Rule: the magnetic field is from N to S (left to right), current is upwards, so the force is into the page.