UI Physics 2012/2013 Past Questions

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

Which of the following quantities of water has undergone the greatest change from its heat content at melting point?

A.0.5 kg of water at 3°C
B.0.2 kg of water at 8°C
C.0.005 kg of water at 80°C
D.0.1 kg of water at 12°C

Which would cause a more serious burn: 30 g of steam or 30 g of liquid water, both at 100 °C; and why is this so?

A.Water, because it is denser than steam.
B.Steam, because of its specific heat capacity.
C.Steam, because of its latent heat of vaporization.
D.Water, because its specific heat is greater than that of steam

A certain radioactive element has a half life of 20 years. How long will it take the activity to become 1/4 of its original?

A.20 years
B.40 years
C.60 years
D.80 years

A plane progressive wave is represented by y = 2sin(100t - 0.27πx) where all the symbols have their usual meanings. What is the velocity of the wave?

A.500ms^-1
B.400ms^-1
C.200ms^-1
D.100ms^-1

A point on a stationary wave where there is no movement of the medium is called

A.Node
B.Antinode
C.Note
D.Amplitude

A uniform wave has a speed of 10m/s and a period of 0.5 s. The distance between two nearest crests is

A.0.2 m
B.20 m
C.2 m
D.5 m

A vibrating string has a tension of 40N and produces a note of 200Hz when plucked in the middle. When the length of string is unaltered and the tension is increased to 160N, the frequency becomes

A.1600Hz
B.800Hz
C.400HZ
D.200Hz

An organ pipe closed at one end is 80cm long. Determine the frequency of the fundamental note assuming that the speed of sound in air is 340m/s?

A.213Hz
B.318Hz
C.425Hz
D.106Hz

As transverse wave moves through a medium, the particles of the medium

A.vibrate in a path parallel to the path of the wave
B.do not move
C.vibrate in a path perpendicular to the path of the wave
D.vibrate at an angle of 60° to the path of the wave

The sound heard after the reflection of sound wave from a plane surface is known as

A.Echo
B.Refraction
C.Vibration
D.Revibration

Which of the following properties is not common to all waves?

A.Reflection
B.interference
C.Diffraction
D.Polarization

Which of the following statements is true about electromagnetic waves?

A.They are longitudinal
B.They can be seen
C.They have the same frequency in vacuum
D.They travel at the same speed in a vacuum

Which one of the following statements concerning electromagnetic waves is false?

A.Electromagnetic waves are longitudinal waves.
B.Electromagnetic waves transfer energy through space.
C.The existence of electromagnetic waves was predicted by Maxwell.
D.Electromagnetic waves can propagate through a material substance

Which one of the following statements concerning waves is false?

A.A wave can have both transverse and longitudinal components.
B.A wave carries energy from one place to another.
C.A wave does not result in the bulk flow of the material of its medium.
D.A transverse wave is one in which the disturbance is parallel to the direction of travel

A light sensitive area at the back of the eye where images are formed is called

A.Yellow Spot
B.Iris
C.Ciliary Muscle
D.Retina

A luminous object is placed at a given distance from a converging lens of focal length 12cm and a real image is produced. Find the image distance if it is equal to the object distance.

A.6cm
B.3cm
C.12cm
D.24cm

An object is placed 15 cm in front of a concave mirror of radius 40 cm. The image formed is

A.virtual and 60 cm behind the mirror
B.real and 60 cm in front of the mirror
C.virtual and 40 cm from the mirror
D.at infinity

How far from a concave mirror of radius 120 cm must an object be placed such that its erect image is four times its natural size?

A.72 cm
B.64 cm
C.45 cm
D.50 cm

How many images are formed when an object is placed in front of two plane mirrors that are inclined at angle 300 to each other?

A.0
B.6
C.11
D.12

Professor Peters walks directly toward a plane mirror at a speed of 0.25m/s. Determine the speed of the image relative to him.

A.0.13m/s
B.0.50 m/s
C.0.25 m/s
D.0.75 m/s

The angle of incidence in a denser medium when the angle of refraction in the less dense medium is 90 is called a

A.Critical angle
B.Reflected angle
C.Incident angle
D.Emergent angle

The driving mirror is a

A.plane mirror
B.convex mirror
C.concave mirror
D.thick plane mirror

The following are types of a converging lens except

A.biconvex
B.piano-convex
C.mini-convex
D.converging meniscus

When the Sun, the earth and the moon are in line during their movement, with the earth being the opaque object and casting its shadow on the moon, we have

A.Lunar eclipse
B.Total eclipse
C.Partial eclipse
D.Annular eclipse

Which of the following instruments could be used in finding angle of elevation of the sun?

A.Periscope
B.Telescope
C.Kaleidoscope
D.Sextant