Given the progressive wave equation y = 5 sin (2000 πt - 0.4x), calculate wave length

• A) 12.4 m
• B) 15.7 m
• C) 17.5 m
• D) 18.6 m

Total eclipse of the sun occurs when the

• A. earth is between the moon and the sun
• B. sun is between the moon and the earth
• C. moon is between the sun and the earth
• D. ozone layer is threatened

An external force of magnitude 100N acts on a particle of mass 0.15kg for 0.03s. Calculate the change in the speed of the particle

• A. 50ms^-1
• B. 25ms^-1
• C. 20ms^-1
• D. 5ms^-1

The process of detecting a pin mistakenly swallowed by a child is

• A. Diagnosis
• B. Therapy
• C. Crystallography
• D. Mammography

What is the density of a fuel of relative density 0.72? [Density of water = 1000kg m^-3]

• A. 72 kgm^-3
• B. 720 kgm^-3
• C. 7200 kgm^-3
• D. 72000 kgm^-3

The direction of the magnetic field at a point in the vicinity of a bar magnetic is

• A. along the line joining the point to the neutral point
• B. always away from the south pole of the magnet
• C. opposite the direction of theresultant field at that point
• D. the direction towards which the north pole of a compass needle would point

A force of 15N stretches a spring to a total length of 30cm. An additional force of 10N stretches the spring 5cm further. Find the natural length of the spring

• A. 25.0cm
• B. 22.5cm
• C. 20.0cm
• D. 15.0cm

Which of these statements are correct for the pressures in liquids? i. pressure in a liquid at a point acts equally in all directions. ii. pressure increases with depth. iii. pressure at a depth depends on the shape of the container. iv. pressure at the same depth in different liquids are proportional to the density at different liquids.

• A. i, ii, iii only
• B. i, ii, iv only
• C. i, iii, iv only
• D. ii, iii, iv only

In an electrolysis experiment, the ammeter records a steady current of 1 A. The mass of copper deposited in 30 minutes is 0.66 g. Calculate the error in the ammeter reading. [Electrochemical equivalent of copper = 0.00033 g C\(^{-1}\)]

The diagram below illustrates an electromagnetic wave travelling with speed 3.0 x 10⁸ms^-1. Calculate the wave length of the wave

• A. 0.05m
• B. 0.15m
• C. 0.16m
• D. 0.40m