Basics of Physics Worksheet-12

Basics of Physics Worksheet-12

1. Which of the following activity produces electrical energy in a wet cell?

(a) Nuclear reaction                     (b) Thermal event

(c) Chemical reaction                  (d) Mechanical motion

2. What happens when negative charges separate from positive charges and build up in a place?

(a) It builds up a static electricity

(b) It builds up a static magnetism

(c) It builds up a dynamic charge

(d) An electric arc is produced

3. The lowest frequency at which an object vibrates is called ______.

(a) Lowest frequency                   (b) Fundamental frequency

(c) Pitch                                          (d) Base

4. Heating a solid matter above its _____ will turn it into liquid.

(a) freezing point                           (b) melting point

(c) flash point                                 (d) boiling point

5. Which of the following optical equipment does not use lens:

(a) Flash light   (b) Telescope    (c) Microscope (d) Camera

6. Which of the following object can be used to see the color spectrum of white light?

(a) Prism           (b) Black box    (c) Telescope    (d) Mirror

7. What is the force between two South poles of two magnets?

(a) Pull               (b) Push             (c) Gravity         (d) Low

8. Which material will conduct the heat most efficiently?

(a) Paper           (b) Copper         (c) Wood           (d) Water

9. Which two objects will have largest gravitational force between them if all of them are kept at equal distance from each other?

(a) A and B        (b) B and D       (c) A and C        (d) C and B

10. Thermal energy flows from the ______ objects to the _____ objects.

(a) Colder, Hotter                         (b) Hotter, Colder

(c) Brighter, Dimmer                  (d) Heavier to Lighter

Answer Key:

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