Question

how could brutus increase the amount of electric current his generator produces?
a. increase the rate at which he turns the crank
b. replace the magnet with a weaker magnet
c. replace the wire loop with an unlooped strand of wire
d. increase the distance between the magnet and the wire loop

Explanation:

Step1: Recall electromagnetic - induction principle

Faraday's law of electromagnetic - induction states that the induced electromotive force (emf) in a closed loop is equal to the rate of change of magnetic flux through the loop. The induced current is proportional to the induced emf.

Step2: Analyze each option

• Option A: Increasing the rate at which the crank is turned increases the rate of change of magnetic flux through the wire loop. According to Faraday's law, this increases the induced emf and thus the induced current.
• Option B: Replacing the magnet with a weaker magnet decreases the magnetic field strength. This decreases the magnetic flux through the loop, resulting in a lower induced emf and current.
• Option C: An unlooped strand of wire does not form a closed - loop for the induced current to flow. A closed loop is necessary for the generation of a continuous current.
• Option D: Increasing the distance between the magnet and the wire loop decreases the magnetic field strength at the location of the loop, reducing the magnetic flux and the induced emf and current.

Answer:

A. increase the rate at which he turns the crank