Advertisements
Advertisements
प्रश्न
The essential difference between an AC generator and a DC generator is that
पर्याय
AC generator has an electromagnet while a DC generator has permanent magnet.
DC generator will generate a higher voltage.
AC generator will generate a higher voltage.
AC generator has slip rings while the DC generator has a commutator.
उत्तर
AC generator has slip rings while the DC generator has a commutator.
संबंधित प्रश्न
Name some sources of direct current.
State whether the following statement is true or false.
An electric motor converts mechanical energy into electrical energy.
Name the device which converts mechanical energy into electric energy.
What is the function of brushes in an electric generator?
Explain the principle of an electric generator.
A d.c. generator is based on the principle of:
(a) electrochemical induction
(b) electromagnetic induction
(c) magnetic effect of current
(d) heating effect of current
Explain the construction and working of an electric generator (AC) with the help of a neat diagram.
The given figures 1 to 3 show the working of a simple A.C. generator. Study the diagrams and answers of the following questions.
(i) State and explain the principle underlying the working of a simple generator.
(ii) Where is the loop of wire placed?
(iii) What happens when the loop is rotated?
(iv) Indicate the direction of the current flow through the wire for the first half of the turn (in first figure). Name and state the rule used in finding the direction of the current.
(v) Indicate the direction of the current for the case shown in second figure.
(vi) Indicate the direction of current in the outer circuit (i.e., electric bulb) in first and third figure.
(vii) What type of current is shown in the above diagrams? Explain.
Draw a neat diagram of an AC generator and explain its working.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
