An ac generator consists of a coil with 50 turns of wire, each with an area of 0

Question

An ac generator consists of a coil with 50 turns of wire, each with an area of 0.02 m^2. The coil rotates in a uniform magnetic field B = 0.4 T at a constant frequency of 60 Hz and produces an average power of 50 W. What is the resistance of the coil? At what rate would the current in 100-mH inductor have to change to induce an emf of 1000 V? 10, 000 A/s An air-filled 39.1 mu H solenoid has a length 4.0 cm and cross-sectional area 0.60 cm^3. How many turns are in this solenoid? The phase angle of an LRC series circuit with an inductive reactance of 200 Ohm and a capacitance reactance of 100 Ohm is 40.0 degree. What is the value of the resister in this circuit? The phase angle of an LRC series circuit with a capacitance reactance of 40 Ohm, a resistor of 100 Ohm and a certain inductor at 1000 Hz is 40.0 degree. What is the value of the inductance in this circuit? Find the torque on the loop shown if the loop has 10 turns. A rod of mass 25 g falls under the influence of gravity in the presence of a 0.55 T magnetic field. The rad has a length of 2.00 m. Find the induced voltage, and The direction of the current.

Explanation / Answer

Solving first question on the paper

Problem 4

voltage =change in flux /time

=2*pi*f=377 rad/s

rms voltage= BAN/21/2=106.63 V

power=(rms voltagr)^2/resistance=>resistance=(rms voltage)^2/power

resistance=227.4 ohm

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