1. Super conductivity of metals implies:
Ans: Zero resistance to electricity
2. The first nuclear plant in India is at:
Ans: Tarapur
3. Diffusion of light in atmosphere takes place due to:
Ans: Dust particles
4. What phenomenon caused by lateral inversion?
Ans: Reflection of light
5. The working principle of transformer is:
Ans: Electromagnetic Induction
6. What is the SI unit of pressure?
Ans: N/m2 OR Pascal (Pa)
7. A hole is made in a brass plate and it is heated the size of the hole will:
Ans: First increase and then decrease
8. The kinetic energy of a body is directly proportional to the:
Ans: Mass of the body
9. When will our body have least potential energy?
Ans: When we lie down
10. The SI unit of heat is?
Ans: Joule (J)
11. Ultra sound scanning was invented by?
Ans: I. Donald
12. Viscosity is:
Ans: Property of oil
13. Scald is a thermal injury caused by:
Ans: Moist heat
14. Celsius and Fahrenheit show the same temperature at?
Ans: -40 (minus 40)
15. Which is the form of energy present in the compressed string?
Ans: Potential energy
16. If a mirror has a focal length of +15cm it is a:
Ans: Convex mirror
17. When a boat enters the sea from a river:
Ans: It floats higher
18. The intensity of earthquake is measured by:
Ans: Richter scale
19. Yellow light is a combination of _____ primary colors.
Ans: Red and Green
20. Co- efficient of thermal conductivity depends on:
Ans: Nature of material
21. If a person who weighs 120 kgs on earth. What would be his weight on moon:
Ans: 20 kgs
22. An instrument used to measure the depth of the ocean:
Ans: Echo sounder
23. Most of the light rays inside the tube light in the form of:
Ans: Ultraviolet
24. Which wave is used in SONAR?
Ans: Ultrasonic wave
25. When a tooth paste tube is squeezed, its shape changes. The force responsible for this is an example of?
Ans: Balanced forces
26. Name the principle of which rocket works?
Ans: Principle of action and reaction
27. What is the elementary particles that defines light?
Ans: Photon
28. The lowest temperature is recorded at?
Ans: Just before sunrise
29. When ice melts its volume:
Ans: Decreases
30. Which colour of the spectrum has shortest wavelength?
Ans: Violet
31. An instrument that deliver moisture to the air by heating water to produce steam is:
Ans: Vaporizer
32. The first winner of the Nobel prize in physics is:
Ans: Roentgen
33. Dentist use which mirror?
Ans: Concave mirror
34. What is the SI unit of electric current?
Ans: Ampere
35. Who propounded the equation E= Mc2?
Ans: Albert Einstein
