A.
Volt
B.
Ampere
C.
Watt
D.
Coulomb
Answer:
Option B: Ampere
2. Which one of the following has the least penetrating power?
A.
Alpha rays
B.
Gamma rays
C.
Beta rays
D.
X-rays
Answer:
Option A: Alpha rays
3. The transition of a substance directly from the solid phase to the gaseous phase without passing through the intermediate liquid phase is called?
A.
Condensation
B.
Evaporation
C.
Sublimation
D.
Distillation
Answer:
Option C: Sublimation
4. If the mass of the pendulum is doubled, the time period _____________.
A.
becomes double
B.
becomes half
C.
becomes four times
D.
remains same
Answer:
Option D: remains same
5. What is the resistance of an ideal voltmeter?
A.
Zero
B.
Infinite
C.
Very low
D.
Very high
Answer:
Option B: Infinite
6. The Sun produces heat and light by?
A.
Biological reactions
B.
Nuclear reactions
C.
Chemical reactions
D.
Ionic reactions
Answer:
Option B: Nuclear reactions
7. The distance between two successive crests or troughs of a wave is called?
A.
Amplitude
B.
Wavenumber
C.
Wavelength
D.
Wave velocity
Answer:
Option C: Wavelength
8. Which one of the following is not a type of electromagnetic waves?
A.
Radio waves
B.
Microwaves
C.
Ultraviolet waves
D.
Sound Waves
Answer:
Option D: Sound Waves
9. Who discovered radioactivity?
A.
Wilhelm Roentgen
B.
J. J. Thomson
C.
Marie Curie
D.
Henri Becquerel
Answer:
Option D: Henri Becquerel
10. The minority charge carriers in the p-type semiconductor are?
A.
Holes
B.
Electrons
C.
Equal concentration of holes and electrons
D.
None of the above
Answer:
Option B: Electrons
11. Which one of the following is not a semiconductor?
A.
Germanium
B.
Tellurium
C.
Silicon
D.
Osmium
Answer:
Option D: Osmium
12. What is the value of the gravitational constant G?
A.
6.673 × 10^-11 N m^2 Kg^-2
B.
1.673 × 10^-11 N m^2 Kg^-2
C.
9.673 × 10^-11 N m^2 Kg^-2
D.
11.673 × 10^-11 N m^2 Kg^-2
Answer:
Option A: 6.673 × 10^-11 N m^2 Kg^-2
13. Which colour deviates the least when white light is made to pass through a prism?
A.
Violet
B.
Blue
C.
Green
D.
Red
Answer:
Option D: Red
14. The fourth state of matter is ____________.
A.
Fluid
B.
Plasma
C.
Liquid
D.
Solid
Answer:
Option B: Plasma
15. What is the focal length of a plane mirror?
A.
Zero
B.
Infinity
C.
Positive
D.
Negative
Answer:
Option B: Infinity
16. Which finger shows the direction of electric current in Fleming’s left-hand rule?
A.
Thumb finger
B.
Index finger
C.
Middle finger
D.
Ring finger
Answer:
Option C: Middle finger
17. Which one of the following is a vector quantity?
A.
Volume
B.
Density
C.
Speed
D.
Velocity
Answer:
Option D: Velocity
18. The Optical fiber works on the principle of?
A.
Refraction
B.
Total Internal Reflection
C.
Interference
D.
Scattering
Answer:
Option B: Total Internal Reflection
19. Sound travels fastest through ___________.
A.
Solid
B.
Liquid
C.
Air
D.
Vaccum
Answer:
Option A: Solid
20. Which device is used to measure the surface temperature of an object without touching its surface?
A.
Thermometer
B.
Pyrometer
C.
Calorimeter
D.
Potentiometer
Answer:
Option B: Pyrometer