7
QuizMultiple Choice

Applications of Electromagnetism

Question 7 • WA-Physical Science B

Helen adjusts the armature of an electric generator by increasing the number of coils around the iron core. What is Helen most likely trying to do?

Answer
A
maintain the direction of the current flow
B
reverse the direction of the current flow
C
decrease the amount of current
D
increase the amount of current

Explanation

Adding more coils to the generator’s armature increases the induced voltage when the armature moves through the magnetic field. With the circuit otherwise unchanged, a higher voltage produces more current. Helen is most likely trying to increase the amount of current, not change its direction.

AI-written and checked against the verified answer.

Next