A.
Greater than
B.
Lesser than
C.
Equal to
D.
Double
Answer:
Option B: Lesser than
2. The speed of sound ____________ with increase in temperature of the medium.
A.
Remains same
B.
Decreases
C.
Increases
D.
None of the options
Answer:
Option C: Increases
3. Which one of the below is not a unit of pressure?
A.
Bar
B.
Parsec
C.
Pascal
D.
Torr
Answer:
Option B: Parsec
4. Which one of the below is an electronic component that stores electric charge and releases it when required?
A.
Transistor
B.
Inductor
C.
Resistor
D.
Capacitor
Answer:
Option D: Capacitor
5. On which principle does the hydraulic lift works?
A.
Pascal’s law
B.
Archimedes’ law
C.
Joule’s law
D.
Newton’s law
Answer:
Option A: Pascal’s law
6. Which electromagnetic radiation has the shortest wavelength?
A.
Radio wave
B.
Infrared ray
C.
Gamma ray
D.
X-ray
Answer:
Option C: Gamma ray
7. What is the correct value of 0°C on the Kelvin scale?
A.
270.15
B.
273.15
C.
270.333
D.
273.97
Answer:
Option B: 273.15
8. The majority charge carriers in the p-type semiconductor are?
A.
Holes
B.
Electrons
C.
Neutrons
D.
Protons
Answer:
Option A: Holes
9. A reaction in which heat is absorbed by the system from the surroundings is called?
A.
Reversible reaction
B.
Exothermic reaction
C.
Endothermic reaction
D.
Irreversible reaction
Answer:
Option C: Endothermic reaction
10. Density is the ratio of the mass of an object to its __________.
A.
Volume
B.
Length
C.
Weight
D.
Surface area
Answer:
Option A: Volume
11. Which color will you get when you mix red, green, and blue light?
A.
Black
B.
White
C.
Maroon
D.
Orange
Answer:
Option B: White
12. Which one of the below is equal to one billionth of a metre?
A.
Millimetre
B.
Picometre
C.
Micrometre
D.
Nanometre
Answer:
Option D: Nanometre
13. Which scientific instrument is used to measure atmospheric pressure?
A.
Barometer
B.
Anemometer
C.
Tachometer
D.
Hydrometer
Answer:
Option A: Barometer
14. Who developed the theory of relativity?
A.
Isaac Newton
B.
Stephen Hawking
C.
Albert Einstein
D.
Charles Darwin
Answer:
Option C: Albert Einstein
15. How many base units are there in the SI system?
A.
Five
B.
Seven
C.
Nine
D.
Fourteen
Answer:
Option B: Seven
16. Which is the correct relation between frequency(f) and angular frequency(ω)?
A.
f = πω
B.
f = 2πω
C.
ω = πf
D.
ω = 2πf
Answer:
Option D: ω = 2πf
17. The sound waves with frequency ranging from 20 Hz to 20 kHz is known as?
A.
Hypersonic sound
B.
Infrasound
C.
Audible sound
D.
Ultrasound
Answer:
Option C: Audible sound
18. Pressure = ?
A.
Force x Area
B.
Force / Area
C.
Force + Area
D.
Area / Force
Answer:
Option B: Force / Area
19. An electric motor converts electrical energy into __________.
A.
Mechanical energy
B.
Chemical energy
C.
Light energy
D.
Sound energy
Answer:
Option A: Mechanical energy
20. Which electromagnetic radiation is used for satellite communication?
A.
Infrared
B.
Ultraviolet
C.
X-ray
D.
Radio wave
Answer:
Option D: Radio wave