A.
Virtual, Erect
B.
Virtual, Enlarged
C.
Real, Inverted
D.
Real, Erect
Answer:
Option A: Virtual, Erect
2. Which is the SI unit of thermodynamic temperature?
A.
Celsius
B.
Fahrenheit
C.
Kelvin
D.
Joule
Answer:
Option C: Kelvin
3. The reciprocal of resistance is called?
A.
Resistivity
B.
Conductance
C.
Conductivity
D.
Specific conductance
Answer:
Option B: Conductance
4. One joule is approximately equal to how many calories?
A.
240
B.
24
C.
2.4
D.
0.24
Answer:
Option D: 0.24
5. Which one of the following is a scalar quantity?
A.
Acceleration
B.
Distance
C.
Displacement
D.
Momentum
Answer:
Option B: Distance
6. What is the absorptive power of a perfectly black body?
A.
1
B.
0
C.
Infinity
D.
0.5
Answer:
Option A: 1
7. The energy possessed by an object due to its motion is called?
A.
Nuclear energy
B.
Gravitational Energy
C.
Potential energy
D.
Kinetic energy
Answer:
Option D: Kinetic energy
8. The loudness of sound is directly proportional to the __________ of the amplitude.
A.
Square root
B.
Square
C.
Cube root
D.
Cube
Answer:
Option B: Square
9. The speed of a body that has Mach number greater than 5 is called?
A.
Subsonic
B.
Supersonic
C.
Hypersonic
D.
Ultrasonic
Answer:
Option C: Hypersonic
10. Who discovered gravity?
A.
Nicolaus Copernicus
B.
Galileo Galilei
C.
Johannes Kepler
D.
Isaac Newton
Answer:
Option D: Isaac Newton
11. The sky is blue because of ____________ of light.
A.
Reflection
B.
Refraction
C.
Scattering
D.
Dispersion
Answer:
Option C: Scattering
12. The rate of change of velocity of an object with respect to time is called?
A.
Displacement
B.
Speed
C.
Torque
D.
Acceleration
Answer:
Option D: Acceleration
13. Which instrument is used to measure the speed of the wind?
A.
Anemometer
B.
Barometer
C.
Hydrometer
D.
Tachometer
Answer:
Option A: Anemometer
14. What is the speed of sound in dry air at 20 °C?
A.
375 m/s
B.
343 m/s
C.
323 m/s
D.
300 m/s
Answer:
Option B: 343 m/s
15. The speed of light is maximum in?
A.
Solid
B.
Liquid
C.
Air
D.
Vacuum
Answer:
Option D: Vacuum
16. At what temperature is the density of water maximum?
A.
-4° C
B.
0° C
C.
4° C
D.
100° C
Answer:
Option C: 4° C
17. Which metal is used as the filament of an electric bulb?
A.
Titanium
B.
Tungsten
C.
Lead
D.
Mercury
Answer:
Option B: Tungsten
18. What is the working principle of a washing machine?
A.
Centrifugation
B.
Dialysis
C.
Reverse osmosis
D.
Diffusion
Answer:
Option A: Centrifugation
19. Which instrument is used for measuring the distance traveled by a vehicle?
A.
Speedometer
B.
Tachometer
C.
Odometer
D.
Hygrometer
Answer:
Option C: Odometer
20. Which one of the below is a passive electronic component?
A.
Integrated circuit
B.
Diode
C.
Transistor
D.
Capacitor
Answer:
Option D: Capacitor