Advertisements
Advertisements
Question
Complete the following sentence:
A generator with commutator produces ............... current.
Solution
Complete the following sentence:
A generator with commutator produces D.C. current.
APPEARS IN
RELATED QUESTIONS
Name the device which converts mechanical energy into electric energy.
Name the phenomenon which is made use of in an electric generator.
What change should be made in an a.c. generator so that it may become a d.c. generator?
State whether the following statement are true of false:
A miniature circuit breaker (MCB) works on the heating effect of current.
The current induced in a closed circuit only if there is ______.
What energy conversion does take place in a generator when it is in use?
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.
State true or false:
The frequency of AC is 50 Hz.
The part of the AC generator that passes the current from the armature coil to the external circuit is ______.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?