- Aleads the voltage by 180
- Blags the voltage by 90
- Cleads the voltage by 90
- Dremains in phase with the voltage
Explanation:
Current leads by 90°.
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Which of the following is electromagnetic wave
|
(a) X-rays and light waves |
(b) Cosmic rays and sound waves |
|
(c) Beta rays and sound waves |
(d) Alpha rays and sound waves |
A study of binary stars is most helpful in
|
(a) Finding their distances |
(b) Finding their temperature |
|
(c) Finding their masses |
(d) Verifying Newton's force law of gravitation |
Which of the following is true for number of spectral lines in going form Layman series to Pfund series
|
(a) Increases |
(b) Decreases |
|
(c) Unchanged |
(d) May decreases or increases |
An atomic power nuclear reactor can deliver 300 MW. The energy released due to fission of each nucleus of uranium atom
is 170 MeV. The number of uranium atoms fissioned per hour will be
|
(a) 30 |
(b) 4 |
(c) 10 |
(d) 5 |
An electron enters a region where magnetic (B) and electric (E) fields are mutually perpendicular to one another, then
|
(a) It will always move in the direction of B |
|
(b) It will always move in the direction of E |
|
(c) It always possess circular motion |
|
(d) It can go undeflected also |