Lesson: Alternating Current Circuits High School PhysicsPhysics
In this lesson, we will learn how to determine the values of electrical quantities in circuits powered by alternating voltages.
An alternating current has a peak value of 1.35 A. What is the root-mean-square value of the current?
An ac generator has a frequency of 50 Hz. The coil of the generator is initially parallel to the generator’s magnetic field and its loops are coplanar. At what time after the coil starts rotating is the instantaneous potential difference across the coil equal to the root-mean-square potential difference produced by the generator?
An alternating current generator contains 25 rectangular loops of conducting wire with side lengths of 45 cm and 35 cm, the ends of which form terminals. The sides of the loops with the same lengths as each other are parallel to each other. The loops rotate within a uniform magnetic field at 22 revolutions per second. The peak potential difference across the terminals is 105 V. What is the strength of the magnetic field?