Question 4776:

Which of the following materials obey ohm’s law of electricity?

A. Metals
B. Semiconductors
C. Liquids
D. Insulators

Question 4777:

Which of the following observations is not an effect of surface tension?

A. Droplets of water dripping slowly from a tap
B. Mercury spilled on a clean glass plate forms small spheres of droplets
C. And insect walking across the surface of a pond
D. Water flowing out more easily than engine oil from container

Question 4778:

Which of the following statement about solid friction are correct?
I. It is a force
II. Occurs between the surfaces of two bodies in contact
III. Depend on the area of contact

A. I and II only
B. I and III
C. II and III only
D. I, II and II

Question 4779:

A body moving at a constant speed accelerates when it is ____________

A. Rectilinear motion
B. Translation motion
C. Circular motion
D. Vibrational motion

Question 4780:

The term rectilinear acceleration means the rate of increase of ____________

A. Velocity along a circular part in a unit time
B. Distance along a rectangular path in a unit time
C. Displacement along a straight time path in a unit time
D. Velocity along a straight path in a unit time