General Science-58

1. Which one of the following remains constant while throwing the ball upward?
a. Force
b. Kinetic energy
c. Acceleration
d. Velocity

2. Which of the following device is fully duplex
a. Mobile phone
b. Walky-talky
c. Loud Speaker
d. Radio

3. When we speak into a microphone, what type of vibrations the diaphragm executes?
a. Free
b. Resonant
c. Forced
d. None of these

4. Which one of the following forces lead to separation of the cream from the churned milk?
a. Gravitational force
b. Cohesive force
c. Centripetal force
d. Centrifugal force

5. The volume of the nucleus is proportional to
a. atomic number
b. mass number
c. number of neutron
d. number of proton

6. Which one of the following is correct when a body moving in a circular path with constant speed?
a. The body has constant acceleration
b. The body has constant retardation
c. The body has variable acceleration
d. the body has constant velocity and variable speed

7. Which one is not produced by sound waves in the air?
a. Refraction
b. Polarization
c. Diffraction
d. Reflection

8. Why laser is used in the pipe alignment?
a. They are directional in nature
b. They are coherent
c. They are monochromatic
d. None of the above

9. The velocity of the sound is greatest in
a. Water
b. Air
c. Vacuum
d. Metal

10. Which one of the following phenomena is associated with the fire flies giving cold light in night?
a. Fluorescence
b. Phosphorescence
c. Chemiluminescence
d. Effervescence