A.
Transistor
B.
Inductor
C.
Resistor
D.
Capacitor
Answer:
Option A: Transistor
2. Total internal reflection cannot not take place when light travels from _______ to _______.
A.
Water, Air
B.
Glass, Air
C.
Glass, Water
D.
Water, Glass
Answer:
Option D: Water, Glass
3. What is the relation between the focal length(f) and radius of curvature(R) for a spherical mirror?
A.
f = 2R
B.
f = 4R
C.
R = 2f
D.
R = 4f
Answer:
Option C: R = 2f
4. A push or pull of an object is called ___________.
A.
Pressure
B.
Force
C.
Acceleration
D.
Thrust
Answer:
Option B: Force
5. Which one of the below is not a transducer?
A.
Microphone
B.
Loudspeaker
C.
Amplifier
D.
Thermocouple
Answer:
Option C: Amplifier
6. What is the minimum distance (in the air at 25 °C) between the observer and the obstacle for the echo to be heard clearly?
A.
17.2 meters
B.
10.8 meters
C.
5.6 meters
D.
32.3 meters
Answer:
Option A: 17.2 meters
7. What percentage of a radioactive substance is left after 5 half-lives?
A.
12.50%
B.
6.25%
C.
3.125%
D.
1.562%
Answer:
Option C: 3.125%
8. 1 Femtometre = _____________ meters.
A.
10^-15
B.
10^-12
C.
10^-9
D.
10^-6
Answer:
Option A: 10^-15
9. Which color of visible light has the longest wavelength?
A.
Blue
B.
Green
C.
Red
D.
Orange
Answer:
Option C: Red
10. Newton’s first law is also known as?
A.
Law of energy
B.
Law of inertia
C.
Law of momentum
D.
Law of floatation
Answer:
Option B: Law of inertia
11. The dielectric constant is also known as?
A.
Relative permeability
B.
Relative density
C.
Relative index
D.
Relative permittivity
Answer:
Option D: Relative permittivity
12. Which color is formed when blue and green lights are mixed?
A.
Magenta
B.
Indigo
C.
Cyan
D.
Maroon
Answer:
Option C: Cyan
13. Which colour deviates the most when white light is made to pass through a prism?
A.
Violet
B.
Blue
C.
Green
D.
Red
Answer:
Option A: Violet
14. Which one of the below has the highest specific heat capacity?
A.
Mercury
B.
Oxygen
C.
Steel
D.
Water
Answer:
Option D: Water
15. The raindrops take up the spherical shape due to the ____________ of water.
A.
Viscosity
B.
Surface tension
C.
Density
D.
Pressure
Answer:
Option B: Surface tension
16. Which is the SI unit of luminous intensity?
A.
Weber
B.
Kelvin
C.
Mole
D.
Candela
Answer:
Option D: Candela
17. The value of acceleration due to gravity is maximum at?
A.
Equator
B.
Poles
C.
Both A and B
D.
None of these
Answer:
Option B: Poles
18. The conductivity of a superconductor is?
A.
Infinite
B.
Low
C.
High
D.
Zero
Answer:
Option A: Infinite
19. Which instrument is used for determining the specific gravity of liquids?
A.
Hygrometer
B.
Anemometer
C.
Hydrometer
D.
Tachometer
Answer:
Option C: Hydrometer
20. In which mode of heat transfer, the heat waves travel along a straight line with the speed of light?
A.
Thermal conduction
B.
Thermal radiation
C.
Forced convection
D.
Natural convection
Answer:
Option B: Thermal radiation