UNICAL Physics 2007/2008 Past Questions

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

The weakest form of bonding in materials is

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

The period of a simple pendulum oscillating in a vacuum depends on:

A.the mass of the pendulum
B.the length of the pendulum
C.the acceleration of the pendulum
D.the volume of the pendulum

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

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

Which of these best describes the power of a lens

A.p = ¹/_f
B.p = ^f/_u
C. p = fλ
D. p = fµ

Which of the following attributes of a machine does not depend on friction?
(1) mechanical advantage (2) Velocity ratio (3) efficiency

A.1 only
B.2 only
C.3 only
D.1 and 2 only

A cell is a device which converts

A.kinetic energy to potential energy
B.sound energy to electrical energy
C.chemical energy to heat energy
D.chemical energy to electrical energy

In which of the following media would sound waves travel fastest

A.kerosene
B.alcohol
C.water
D.iron

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

If v is the velocity of a wave, λ is its wavelength and T its period. λ and T are related by the expression.

A.λ = v/T²
B.v = λT
C.λ = vT
D.v = T/λ

Three 3.0Ω resistors are connected in parallel. What is the equivalent resistance?

A.9.0λ
B.1.0Ω
C.6.0Ω
D.3.0Ω