ABU Physics 2018/2019 Past Questions

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

In an elastic collision, momentum is conserved as well as

A.velocity
B.kinetic energy
C.potential energy
D.speed

The dimensions of momentum are

A.MLT
B.ML^-1T^-1
C.MLT^-1
D.ML^-1T

A convex lens of focal length 10.0cm is used to form a real image which is half the size of the object. How far from the object is the image?

A.45cm
B.30cm
C.15cm
D.20cm

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 distance between two successive crest or trough is

A.amplitude
B.wavelength
C.frequency
D.wave distance

Light waves and ripples of water are similar because both

A.are longitudinal waves
B.have the same velocity
C.can be diffracted and refracted
D.diffracted and refracted

An electric cell has an internal resistance of 2 ohm. A current of 0.5 A is found to flow when a resistor of 5 ohms is connected across it. What is the electromotive force of the cell?

A.5 volts
B.3.5volts
C.2.5 volts
D.1 volt
E.10 volts

A 70kg man ascends a flight of stairs of height 4m in 7s. The power expended by the man is:

A.40W
B.100W
C.280W
D.400W

The weakest form of bonding in materials is

A.ionic
B.metallic
C.covalent
D.Van der waals

The time rate of increase in velocity is called

A.force
B.momentum
C.acceleration
D.speed