16. When the plate area of a capacitor increases?
- A. the voltage can withstand increase
- B. the capacitance decreases
- C. the capacitance is unaffected
- D. the capacitance increases
Correct Option: Answer is D
17. A magnet relay is a device used for?
- A. reading the magnitude of magnetic flux
- B. controlling another circuit carrying larger current
- C. turning in sports
- D. storing magnetic field
Correct Option: Answer is B
18. According to kinetic molecular model in gases,
- A. the particles are closely packed together; they occupy minimum space are usually arranged in a regular pattern
- B. the particles vibrate about fixed positions and are held together by the strong intermolecular bonds between them
- C. the molecules are very far apart and occupy all the spaces made available to them
- D. the particles occur in clusters with molecules slightly further apart
Correct Option: Answer is C
19. A current of 0.5 A flows through a resistor when connected to a 40 V battery. How much energy is dispatched in 2 minutes?
- A. 2400 J
- B. 9600 J
- C. 1500 J
- D. 1200 J
Correct Option: Answer is A
Energy = power x time
Power = voltage x current.
Energy = voltage x current x time
Energy = 40 x 0.5 x 60 x 2
=> 2,400j
20.
For a pear-shaped conductor shown above, the concentration of charge on the outside is highest at?
- A. X
- B. Z
- C. Y
- D. K
Correct Option: Answer is A
21. The vapour pressure?
- A. increases non-linearly with measuring temperature
- B. increases linearly with increasing temperature
- C. decreases linearly with increasing temperature
- D. decreases non-linearly with measuring temperature
Correct Option: Answer is B
As the temperature of a liquid or solid increases its vapor pressure also increases.
Conversely, vapor pressure decreases as the temperature decreases.
i.e. vapor pressure is directly proportional to temperature
22. potential energy in an elastic string of force constant k, which has an extension X is?
- A. kX
- B. KX2
- C. ½KX2
- D. ½K
Correct Option: Answer is C
23. A reservoir is filled with liquid of density 2000 kgm−1. Calculate the depth at which the pressure in the liquid will be equal to 9100 Nm−2 (g = 10 ms−2)
- A. 0.262 m
- B. 0.664 m
- C. 0.819 m
- D. 0.455 m
Correct Option: Answer is D
24. Water is not a good thermometric liquid because it?
- A. expands unevenly between 0 ºC and 4 ºC
- B. maintains fixed density
- C. has high freezing point
- D. wets glass
Correct Option: Answer is A
25. Which of these is not a second class lever?
- A. sugar tongs
- B. claw hammer
- C. plier
- D. wheelbarrow
Correct Option: Answer is C
Examples of first class levers are pliers, scissors, a crow bar, a claw hammer, a see-saw and a weighing balance.
A wheelbarrow, a bottle opener, and an oar are examples of second class levers
26. In the formation of sea breeze, wind blows from?
- A. sky to land
- B. sea to sky
- C. land to sea
- D. sea to land
Correct Option: Answer is D
A sea breeze describes a wind that blows from the ocean inland towards land.
This breeze occurs most often in the spring and summer months because of the greater temperature differences between the ocean and nearby land, particularly in the afternoon when the land is at maximum heating from the sun.
27. Which component of fiber-optic connector has a provision of entry for the fibre along with the fixation to connector housing?
- A. coupling device
- B. cable
- C. ferrule
- D. connector housing
Correct Option: Answer is A
Fiber optic couplers are used to split the input signals into two or more outputs, they are called splitters in this case.
28. The gravitational pull on the moon is 1/6 that of the earth. If a body weighs 6.0 N on the moon, what will be the weight on the earth?
- A. 6.0 N
- B. 5.0 N
- C. 12.0 N
- D. 36.0 N
Correct Option: Answer is B
29. In order to view the sun, the most suitable instrument to use is?
- A. helioscope
- B. telescope
- C. stroboscope
- D. sun meter
Correct Option: Answer is A
30. The eclipse of the moon occurs when?
- A. the moon reflects the rays from the sun to the earth
- B. the moon comes exactly between the earth and the sun
- C. the earth comes exactly between the moon and the sun
- D. the sun comes exactly between the earth and the moon