Advertisements
Advertisements
Questions
Distinguish between Direct current and alternating current.
Write any two differences between direct current and an alternating current.
Advertisements
Solution
| Direct current | Alternating current | |
| 1. | Magnitude of direct current from a source remains the same. i.e., nonoscillatory. | Alternating current varies in magnitude continuously. i.e., oscillatory. |
| 2. | Direction remains the same. | Direction reverses periodically, i.e., after equal intervals of time. |
| 3. | This type of current is not used much for household purposes but used in batteries, torches, etc. | This type of current is used in electrical household appliances such as electric heater, refrigerators, electric irons, etc. |
| 4. | Frequency of D.C. is zero. | Frequency of A.C. in India is 50 Hz, i.e., its cycle changes in `1/50` second. |
| 5. | Produced by D.C. generator. | Produced by A.C. generator. |
Notes
Students should refer to the answer according to their questions.
RELATED QUESTIONS
Out of an A.C. generator and a D.C. generator:
which one uses a commutator (split rings)?
which one uses slip rings?
What is the difference between alternating current and direct current?
What type of current is given by (i) a dry cell, and (ii) a power House generator?
In what respect does the construction of an A.C. generator differ from that of a D.C. generator?
What do you understand by the terms 'direct current' and 'alternating current'?
Name some sources of direct current and some of alternating current.
State an important advantage of alternating current over direct current.
Explain ‘Electric generator’ with the help of the following points:
- Diagram of an AC Generator with labelling
- Principle of an electric generator
- The function of slip rings
- Any two uses of a generator.
Alternating current : oscillatory :: Direct current : _______
The domestic electricity in India is an ac with a frequency ______ of Hz.
Conceptual question.
Can electroplating be possible with alternating current?
The frequency of electricity produced by DC generator is equal to ____________.
What is the role of fuse, used in series with any electrical appliance? Why should a fuse with defined rating not be replaced by one with a larger rating?
The device used to convert AC to DC is called ______.
Why is an alternating current (A.C.) considered to be advantageous over direct current (D.C.) for the long distance transmission of electric power?
