Radioactivity Questions And Answers (part 2)
Radioactivity Questions1. (a) Define radioactive decay (b) A radioactive element decays to 1/128 of its original activity after 49 days. Determine its half –life2. (a)
X-ray Questions And Answers (part 2)
X-ray Questions 1. Give one use of X –rays in medicine 2. State the factor that affects:- (i) The intensity of X-rays (ii) The strength
ELECTRICITY & Electronics Questions And Answers
ELECTRICITY & Electronics Questions1. State one advantage of a lead-acid accumulator over a dry cell 2. State one defect of a simple cell and explain
Photoelectric effect Questions And Answers (part 2)
Photoelectric effect Questions1. (a) Define the following: (i) Photoelectric effect (ii) threshold wavelength (b) The variation of frequency f with the maximum
Floating and sinking Questions And Answers (part 2)
Floating and sinking Questions1. Define thermionic emission2. (a) State:- (i) Archimedes’s principle (ii) The law of floatation (b) The solid of mass 12kg, weighs 100N
Work, energy and power Questions And Answers (part 2)
Work, energy and power Questions1. Given that a lamp is rated 45W 240V. Calculate the resistance of the heating element. 2. An electric bulb is
Waves II Questions And Answers (part 2)
Waves II Questions1. (a) (i) Distinguish between stationary and progressive waves (ii) State a reason why a closed tube or pipe produces
Quality of heat Questions And Answers (part 2)
Quality of heat Questions1. 500g of a metal is heated to 100oC and then placed in a 200g mass of water at 15oC. If the
Thin lenses Questions And Answers (part 2)
Thin lenses Questions1. The figure below shows how rays from a distant and near objects are focused inside a human eye with a certain defect
Sound II Questions And Answers (part 2)
Sound II Questions1. The human ear can distinguish two sounds as separate only if they need it at least 0.1 secondsapart. How far from a
Refraction of light Questions And Answers (part 2)
Refraction of light Questions1. The refractive index of paraffin is 1.47 and that of glass is 1.55. Determine the critical angle of a ray of
Resistors Questions And Answers (part 2)
Resistors Questions1. Your are provided with the following apparatus: connecting wires, an ammeter, fixed resistors, a voltmeter, a variance resistor, a switch and two dry
Machines & inclined planes Questions And Answers (part 2)
Machines & inclined planes Questions1. (a) Distinguish energy from work (b) A lady uses a ramp to lift 1500N load though a vertical distance
Linear motion Questions And Answers (part 2)
Linear motion Questions1. A footballer kicks a ball of mass 0.6kg initially at rest using a force of 720N. If the foot was in
Reflection at curved surfaces and spherical surfaces Questions And Answers (part 2)
Reflection at curved surfaces and spherical surfaces Questions1. (a) The table below shows the object distance u and the corresponding image distance v of an
Magnetsim Questions And Answers (part 2)
Magnetsim Questions1. (a Two pins are attached to each of the magnets as shown below. (i) (ii) Explain the behaviour of pins in each