State the principle of an AC generator. What determines the frequency of AC produced in a generator?
What is the principle of an electric motor?
State the principle of moments.
a) State the principle of ac generator. b) Explain with the help of a well labelled diagram, its working and obtain the expression for the emf generated in the coil. c) Is it possible to generate emf without rotating the coil? Explain
State the principles of electric motor and electric generator.
(a) Name one device which works on the magnetic effect of current. (b) Name one device which works on the phenomenon of electromagnetic induction. (c) Which device converts electric energy into mechanical energy? (d) Describe the principle of working of an electric motor. (e) Explain the principle of working of an electric generator.
Electric motor and Electric generator .
NCERT-MAGNETIC EFFECTS OF ELECTRIC CURRENT SCIENCE-Solved Examples
