Advertisements
Advertisements
Question
State true or false:
The frequency of AC is 50 Hz.
Options
True
False
Advertisements
Solution
The frequency of AC is 50 Hz. - True
APPEARS IN
RELATED QUESTIONS
Name some sources of direct current.
Which sources produce alternating current?
The device used for producing electric current is called a ______.
Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?
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?
Complete the following sentence:
A generator with commutator produces ............... current.
Draw a labelled diagram of a simple a.c. generator.
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric Generator (AC)
A flat coil of wire rotates at a constant speed about an axis perpendicular to a uniform magnetic field. Draw a graph to show how the induced e.m.f. varies relative to the positions of the coil during its one complete rotation. At what position of the coil, the e.m.f. has the maximum value?
State change that you would make to convert an A.C. generator into a D.C. generator. Illustrate the change by a diagram.
Observe the figure and write the answers to the questions asked.
- The construction shown in the figure is of which device?
- Explain the principle on which this device works.
- Write any three uses of this device.
A device for producing electric current is ______.
Draw and label the diagram of an AC generator.
A coil of insulated copper wire is connected to a galvanometer forming a loop and a magnet is:
A: Held stationary
B: Moved away along its axis
C: Moved towards along its axis
D: There will be an induced current in
To convert an AC generator into DC generator ____________.
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
