Physics Module 6 Questions -

In a DC motor, the split-ring commutator reverses current every half cycle to: A) Increase speed B) Prevent overheating C) Keep torque in the same direction D) Convert AC to DC

The magnetic flux through a coil of area 0.5 m² in a uniform 0.2 T field perpendicular to the coil is: A) 0.1 Wb B) 0.4 Wb C) 0.5 Wb D) 1.0 Wb physics module 6 questions

Faraday’s law of electromagnetic induction states that the induced EMF is proportional to: A) The magnetic field strength B) The rate of change of magnetic flux C) The current in the coil D) The resistance of the circuit In a DC motor, the split-ring commutator reverses

A charged particle moves parallel to a magnetic field. The magnetic force on it is: A) Maximum B) Zero C) Dependent on speed only D) Dependent on charge only In a DC motor

State Faraday’s law of electromagnetic induction and explain how Lenz’s law determines the direction of induced current.

Explain why a transformer only works with AC voltage, not DC.