A tuber of cassava can be processed into powder. This explains the face that
2
A piece of metal of relative density 5.0 weighs 60N in air. Calculate its weight when fully immersed in water
3
The tendency of a body to remain at rest when a force is supplied to it is called
4
A force acts on a body for 0.5s changing its momentum from 16.0kg ms -1 to 21.0kgms -1 , calculate the magnitude of the force
5
A moving object is said to have a uniform acceleration if its
6
The period of an oscillatory motion is defined as the
7
The mass on a loaded spiral spring oscillates vertically between two extreme positions P and R equidistant from the equilibrium position Q. Which of the following statements about the system is not correct
8
A ball f mass 5.0kg hits a smooth vertical wall normally with a speed of 2ms -1 . Determine the magnitude of the resulting impulse
9
Which of the following statements correctly defines a simple machine? a device
10
A platinum resistance thermometer has a resistance 4\(\Omega\) at 0oC and 10\(\Omega\) at 100oC. Assuming the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45oC.
11
A metal rod of length 100cm is heated through 100ºC, calculate the change in length of the rod [linear expansivity of the material of the rod is 3 x 10\(^{-5}\)K\(^{-1}\)]
12
The heat capacity of a calorimeter is the amount of energy required to
13
Which of the following statement about latent heat of vaporization is correct? It
14
When the pressure of a fixed mass of gas is doubled at constant temperature, the volume of the gas is
15
The volume of a given mass of an ideal gas at 327k and 9.52 x 10 4 Pa is 40cm 3 . calculate the volume of the gas at 273k and 1.034 x 10 5 Pa.
16
A wave of wavelength 0.30m travels 900m in 3.0s. Calculate its frequency
17
Which of the following condition is necessary for the occurrence of total internal reflection of light?
18
The image which cannot be formed on a screen is said to be
19
An object is placed on the principal axis and at the centre of curvature of a concave mirror, the image of the image formed by the mirror is
20
A converging lens produces an image four times as large as an object placed 25cm from the lens. Calculate its focal length
21
The horizontal floor of a water reservoir appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.35, calculate the real depth of the reservoir
22
A converging lens has a focal length of 5cm. Determine its power
23
Which of the following pairs of rays shows the widest separation in the spectrum of white light?
24
Which of the following statements about the human eye and the camera is correct?
25
The speed of sound in air is is directly proportional to
26
A sonometer wire of linear density 0.08kg m -1 subjected to a tension of 800N is plucked. Calculate the speed of a pulse which moves from one end of the wire to the other
27
Which of the following instruments gives a pure note when sounded?
28
Which of the following features of an electrostatic line of force is not correct?
29
Which of the following statement about force is correct ?
30
A positively charged glass rod is placed by near the cap of a positively charge electroscope. The divergence of the leaf is observed to
31
Two identical cells each of e.m.f 2v and internal resistance 1.0\(\Omega\) are connected in parallel. The combination is connected to an external load of 1.5\(\Omega\). Calculate the current in the circuit
32
Which of the following factors does not affect the the electric resistance of a wire?
33
A current of 10A passes through a conductor for 10s, calculate the charge flowing through the conductor
34
A lamp is rated 240V 60W, calculate the resistance of its filament
35
The maximum power dissipated by a 100\(\Omega\) resistor in a circuit is 4W. Calculate the voltage across the resistor
36
One difference between a reactance and a resistance in an alternating current circuit is
37
The direction of induced current in a straight wire placed in magnetic field is determined by using?
38
Which of the following statements about an electromagnet is not correct?
39
Which of the following statements is not true of the isotopes of an element? They
40
Which of the following statements is true of ultra violet radiations? It
41
A radioactive element has a decay constant of 0.077s -1 , calculate its half life
42
The minimum energy required to remove an electron from an atom is known as
43
Nuclear fission is preferred to nuclear fusion in the generation of energy because?
44
Which of the following reactions represents nuclear fusion?
45
The diagram above shows the resultant electric field pattern due to two electric point charges P and S. Which of the following statements is correct?
46
The bar magnet illustrated in the diagram above picks up an unmagnetised steel nail X. In turn, X picks up a similar nail Y and so on. The nail are said to be magnetised by
