ABU Physics 2019/2020 Past Questions

Practice each question, then open it to see the full details.

The induced current in a coil always flows in a direction so as to oppose the change that causes it. This statement is known as

A.Coulomb's law
B.Lenz's law
C.Faraday's law
D.Ampere's law

Which of the following is true for the image formed by a convex mirror?
I. The image is always virtual
II. The image is always erect
III. The image is never magnified
IV. The image is never magnified
V. the focal length negative

A.I only
B.I and II only
C.II and III only
D.I, II, III and IV only
E.All five

The energy contained in wire when it is extended by 0.02m by a force of 500N is

A.104J
B.103J.
C.10J
D.5J.

Which of the following is not a use of plain mirrors.

A.as wing mirrors on cars
B.as a looking glass
C.in a periscope
D.in a kaleidoscope

The diagram above represents the graph of stress against strain for an elastic wire. The point Q on the graph is the

A.elastic limit
B.breaking point
C.yield point
D.proportional limit

A box of mass 40Kg is being dragged along by the rope inclined at 60° to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done in dragging the box through a distance of 4m?

A.680J
B.200J
C.100J
D.400J.

Which one of the following phenomenon cannot be explained by the wave theory of light?

A.refraction
B.interference
C.diffraction
D.photoelectric effect

What is the dimension of pressure?

A.ML¹T^-2
B.MLT^-2
C.ML²T^-3
D.ML^-3

A diverging lens of focal length 20cm forms an image halve of the size of the object. What is the object distance?

A.11.11cm
B.100cm
C.60cm
D.8.71cm

In electrolysis experiments a cathode of mass 5 g is found to weigh 5.01g after a current of 5A flows for 50 seconds. What is the electrochemical equivalent of the deposited substance?

A.0.00004g/C
B.0.00002g/C
C.0.02500g/C
D.0.05000g/C
E.0.00250g/C