Basics of Physics Worksheet-4

Basics of Physics Worksheet-4

1. What kind of device is shown in the blue circle?

(a) Register       (b) Switch          (c) Bulb              (d) Opener

2. Which of the following is not a source that can power (or rotate the shaft of) a generator?

(a) Falling water (in Hydro power plants)

(b) Steam from a boiler (in Thermal power plant)

(c) Liquid Nitrogen (in Nitrogen power plant)

(d) Wind (in Wind Turbine power plant)

3. What unit is used to measure the amount of electric current?

(a) Ampere        (b) Volt               (c) Watt              (d) Joule

4. What is the scientific name for the part of a sound wave where molecules are spread apart?

(a) Reflection                                 (b) Rarefaction

(c) Absorption                               (d) Compression

5. What happens to the speed of light when it travels through the denser matter?

(a) Nothing                                              

(b) Sometime speeds up and sometime slows down.

(c) It speeds up.

(d) It slows down.

6. What is shown in the above picture?

(a) Radar                                          (b) Microphone

(c) Speaker                                      (d) Oscilloscope

7. Why do you see everything red if you wear red color glasses?

(a) Because, it will paint everything red.

(b) Because, red color glasses will absorb all colors except red.

(c) Because, red color glasses will absorb red color.

(d) Because, red color glasses are red.

8. Which of the following electrical device does not use magnet?

(a) Generator                                  (b) Electric Train

(c) Motor                                         (d) Oven

9. Which sound will have the highest frequency?

(a) Drum                                         (b) Human voice

(c) Running car                             (d) Whistle

10. What are two main kinds of energies produced by the Sun?

(a) Magnetic and Waves             (b) Thermal and Light

(c) Thermal and Wind                 (d) Electrical and Light

Answer Key:

(1)–(b); (2)–(c); (3)–(a); (4)–(b); (5)–(d); (6)–(c); (7)–(b); (8)–(d); (9)–(d); (10)–(b)