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प्रश्न
Explain the principle of an electric generator.
उत्तर
An electric generator works on the principle of electromagnetic induction. It states that when a conductor is moved in a magnetic field, current is induced in the conductor.
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संबंधित प्रश्न
Name some sources of direct current.
Name the device which converts mechanical energy into electric energy.
What type of generator is used at Power Stations?
What determines the frequency of a.c. produced in a generator?
In an a.c. generator the speed at which the coil rotates is doubled. How would this affect
- the frequency of output voltage,
- the maximum output voltage is doubled.
Observe the figure and answer the following questions.
a) Identify the machine shown in figure.
b) Write a use of this machine.
c) How transformation of energy takes place in this machine.
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.
To convert an AC generator into DC generator ____________.
An AC generator is provided with ______ slip rings that rotate with the coil.
State one factor that affects the magnitude of induced current in an AC generator.
