Advertisements
Advertisements
प्रश्न
The device used for producing electric current is called a ______.
विकल्प
generator
galvanometer
ammeter
motor
Advertisements
उत्तर
The device used for producing electric current is called a generator.
Explanation:
- A generator is a device that transforms mechanical energy into electrical energy.
- A galvanometer is a device that detects the existence of electricity in a circuit.
- An ammeter is a device that measures the amount of electric current flowing across a circuit.
- A motor is a piece of machinery that turns electrical energy into mechanical energy.
As a result, the generator is the correct solution.
संबंधित प्रश्न
State the principle of an electric generator.
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 phenomenon which is made use of in an electric generator.
Complete the following sentence:
A generator with commutator produces ............... current.
An electric generator converts:
(a) electrical energy into mechanical energy.
(b) mechanical energy into heat energy.
(c) electrical energy into chemical energy.
(d) mechanical energy into electrical energy.
What determines the frequency of a.c. produced in a generator?
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.
An a.c. generator changes the ______energy to ______ energy.
Explain the construction and working of an electric generator (AC) with the help of a neat diagram.
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.
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 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 withdrawn from inside the coil?
A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?
