A missile is projected so as to attain its maximum range. Calculate the maximum height attained if the initial velocity of projection is 200 ms\(^{-1}\). [g = 10ms\(^{-2}\)]

If the charge on an object is measured as 4.0 x 10^-18C, how many excess electrons does the object possess, given that the charge of an electron is 1.6 x 10^-18C

• A. 18
• B. 19
• C. 25
• D. 37

A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

[Take g = 10 ms\(^{-2}\)]

• A. \(2.4
• B. \(1.5
• C. \(2.4
• D. \(1.3

One major reason why electrical appliances in homes are normally earthed is that the-----------

• A. person touching the appliance is safe from electric shock
• B. appliances are maintained at a higher p.d. than the earth
• C. appliances are maintained at a lower p.d. than the earth
• D. appliances are maintained at the same p.d. with that of the earth

Three cells each of e.m.f. 1.5v and an internal resistance of 1.0\(\Omega\) are connected in parallel across a load resistance of 2.67\(\Omega\). Calculate the current in the load?

• A. 0.26A
• B. 0.41A
• C. 0.50A
• D. 0.79A

A tap supplies water at 26°C while another supplies water at 82°C. If a man wishes to bathe with water at 40°C the ratio of hot mass of hot water to that of cold water required is

• A. 1:3
• B. 3:1
• C. 3:7
• D. 7:3

A body is rotating in a horizontal circle of radius 2.5m with an angular speed of 5 rad s^-1. Calculate the magnitude of the radial acceleration of the body

• A. 62.50ms^-2
• B. 31.25ms^-2
• C. 12.50ms^-2
• D. 10.00ms^-2

In the circuit below, three resistors, 2Ω, 4Ω and 12Ω are connected in parallel and a 12V battery is connected across the combination. The current flowing through the 12Ω resistors is

• A) 14.4 A
• B) 1.0 A
• C) 3.2 A
• D) 9.6 A

The magnification produced with a converging lens is 5. If the object is a square wire gauze of side 2cm, calculate the area of the image

• A. 100cm³
• B. 40cm³
• C. 20cm³
• D. 10cm³

Which of the following equations shows how how the linear expansivity (\(\alpha\)) and the cubic expansivity (\(\gamma\)) of a material are related?

• A.\(\gamma = \alpha\)
• B.\(\gamma = 1 - \alpha\)
• C.\(\gamma = 2 \alpha\)
• D.\(\gamma = 3 \alpha\)