Physics Questions and Answers
| 61. |
The splitting of a beam of white light into its different colours is known as |
| |
- A. refraction
- B. reflection
- C. dispersion
- D. none of these
|
| 62. |
Which one of the following electronic devices is used for digital displays in electronic calculators? |
| |
- A. LEDs
- B. zener diodes
- C. zener diodes
- D. none of these
|
| 63. |
Alternating current is converted into direct current by |
| |
- A. dynamo
- B. transformer
- C. rectifier
- D. motor
|
| 64. |
A lens used to rectify long sight is |
| |
- A. concave lens
- B. convex lens
- C. plano concave lens
- D. plano convex lens
|
