Advertisements
Advertisements
प्रश्न
Distinguish between Direct current and alternating current.
Write any two differences between direct current and an alternating current.
Advertisements
उत्तर
| 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.
संबंधित प्रश्न
Out of an A.C. generator and a D.C. generator:
which one uses a commutator (split rings)?
which one uses slip rings?
What normally drivers the alternators in a Thermal Power Station? What fuels can be used to heat eater in the boiler?
What do you understand by the terms 'direct current' and 'alternating current'?
State an important advantage of alternating current over direct current.
The frequency of direct current (d.c.) is:
(a) 0 Hz
(b) 50 Hz
(c) 60 Hz
(d) 100 H
The frequency of AC is _______.
The alternating current is an oscillatory current.
The frequency of the alternating current is 50 Hz.
The domestic electricity in India is an ac with a frequency ______ of Hz.
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?
Define the following:
Frequency
Complete the correlation:
DC : Non-oscillatory current flowing in one direction : : AC : ______
Why is an alternating current (A.C.) considered to be advantageous over direct current (D.C.) for the long distance transmission of electric power?
How is the type of current used in household supply different from the one given by a battery of dry cells?
