A.
Silver
B.
Copper
C.
Aluminium
D.
Iron
Answer:
Option C: Aluminium
2. What is the dielectric constant of vacuum?
A.
0
B.
1
C.
2
D.
10
Answer:
Option B: 1
3. Which is the SI unit of energy?
A.
Joule
B.
Tesla
C.
Newton
D.
Coulomb
Answer:
Option A: Joule
4. What is the wavelength range of visible light?
A.
250 to 750 nanometers
B.
100 to 500 nanometers
C.
380 to 700 nanometers
D.
20 to 200 nanometers
Answer:
Option C: 380 to 700 nanometers
5. Echoes are produced due to the __________ of sound.
A.
Refraction
B.
Reflection
C.
Diffraction
D.
Polarization
Answer:
Option B: Reflection
6. Which is the correct full form of LASER?
A.
Light Amplification by Stimulated Emission of Radiation
B.
Light Automation by Stimulated Emission of Radiation
C.
Light Amplification by Stimulated Exposure of Radiation
D.
Light Amplification by Semi Emission of Radiation
Answer:
Option A: Light Amplification by Stimulated Emission of Radiation
7. What is the approximate value of acceleration due to gravity on the surface of the Moon?
A.
9.8 m/s2
B.
0.9 m/s2
C.
1.6 m/s2
D.
11.2 m/s2
Answer:
Option C: 1.6 m/s2
8. Which objects do not allow light to pass through them?
A.
Transparent
B.
Translucent
C.
Transitional
D.
Opaque
Answer:
Option D: Opaque
9. The first law of thermodynamics is based on the law of conservation of?
A.
Momentum
B.
Energy
C.
Temperature
D.
Work
Answer:
Option B: Energy
10. How many images are formed when an object is placed between two parallel plane mirrors?
A.
2
B.
4
C.
Zero
D.
Infinite
Answer:
Option D: Infinite
11. What is the force acting perpendicular to the surface of an object called?
A.
Thrust
B.
Weight
C.
Viscosity
D.
Work
Answer:
Option A: Thrust
12. Which instrument is used to measure the rotation speed of a shaft or disk in a motor?
A.
Barometer
B.
Anemometer
C.
Tachometer
D.
Hydrometer
Answer:
Option C: Tachometer
13. How many pascals in 1 torr?
A.
99.32
B.
111.32
C.
122.32
D.
133.32
Answer:
Option D: 133.32
14. Which one of the following has the lowest resistivity?
A.
Aluminium
B.
Silver
C.
Copper
D.
Tungsten
Answer:
Option B: Silver
15. Sound waves cannot travel through __________.
A.
Solid
B.
Liquid
C.
Air
D.
Vacuum
Answer:
Option D: Vacuum
16. Who invented the mercury thermometer?
A.
Daniel Gabriel Fahrenheit
B.
Anders Celsius
C.
Galileo Galilei
D.
William Thomson
Answer:
Option A: Daniel Gabriel Fahrenheit
17. Which is the mathematical formula for Newton’s Second Law of Motion?
A.
E=mc^2
B.
F = ma
C.
L = mvr
D.
n = c / v
Answer:
Option B: F = ma
18. How many electrons are there in one coulomb of charge?
A.
6.2 × 10^-18
B.
6.2 × 10^-9
C.
6.2 × 10^18
D.
6.2 × 10^9
Answer:
Option C: 6.2 × 10^18
19. Which of the following always produces a virtual, erect and diminished image of an object?
A.
Convex mirror
B.
Concave mirror
C.
Both (a) and (b)
D.
None of the options
Answer:
Option A: Convex mirror
20. Which is the strongest fundamental force of nature?
A.
Gravitational force
B.
Strong nuclear force
C.
Weak nuclear force
D.
Electromagnetic force
Answer:
Option B: Strong nuclear force