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Name the branch of biology that deals with the of the following
asked
Jul 8, 2021
in
Biology Form 1
by
anonymous
classification
0
votes
1
answer
Name the branch of biology that deals with the of the following
asked
Jul 8, 2021
in
Biology Form 1
by
anonymous
classification
0
votes
1
answer
The figure below shows the cross-section of a diffusion cloud chamber used to detect radiation from radioactive sources.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
radioactivity
0
votes
1
answer
The graph below shows radioactive decay of iodine.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
radioactivity
0
votes
1
answer
A radioactive carbon-14 decays to nitrogen by beta particles as shown below.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
radioactivity
0
votes
1
answer
An X-ray operates at 30000V and the current through it is 2mA. Given that the charge of an electron is 1.6 x 10-19C, h = 6.63 x 10-34JS, speed of light, C = 3.0 x 108m/s, calculate:-
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
photoelectric effect
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1
answer
State two advantages of using a Cathode Ray Oscilloscope (C.R.O) as a voltmeter over the ordinary voltmeter.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
photoelectric effect
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votes
1
answer
Sodium has a work function of 2.3eV. Given that: Planck’s constant h = 6.63 x 10-34JS, velocity of light in vacuum, C = 3.0 x 108m/s, 1 electron-volt (1eV) = 1.6 x 10-19 C and mass of an electron, me = 9.1 x 10-31kg, calculate:
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
photoelectric effect
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votes
1
answer
State one factor which affects the rate of each of the above types of emission.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
photoelectric effect
0
votes
1
answer
Distinguish between thermionic emission and photoelectric emission.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
photoelectric effect
0
votes
1
answer
Explain how energy losses in a transformer are reduced by having:
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
electromagnetic induction
0
votes
1
answer
A transformer has 800 turns in the primary and 40 turns in the secondary winding. The alternating e.m.f connected to the primary is 240V and the current is 0.5A
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
electromagnetism
electromagnetic induction
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1
answer
A bar magnet is moved into a coil of insulated copper wire connected to a centre-zero galvanometer, as shown in the figure below.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
electromagnetic induction
electromagnetism
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answer
State Lenz’s a law of electromagnetic induction.
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Jul 8, 2021
in
Physics Form 4
by
anonymous
electromagnetic induction
0
votes
1
answer
An object is placed 40cm in front of a concave lens of focal length 20cm; determine the position of the image.
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
thin lenses
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votes
1
answer
The diagram below shows a certain defect of vision. Name the defect.
asked
Jul 8, 2021
in
Physics Form 1
by
anonymous
rectilinear propagation of light and reflection at planes
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votes
1
answer
What do you understand by the term accommodation?
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Jul 8, 2021
in
Physics Form 1
by
anonymous
rectilinear propagation of light and reflection at planes
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votes
1
answer
The critical angle of a certain material medium is 43.2º. Determine the refractive index of the material.
asked
Jul 8, 2021
in
Physics Form 1
by
anonymous
rectilinear propagation of light and reflection at planes
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1
answer
Define refractive index.
asked
Jul 8, 2021
in
Physics Form 1
by
anonymous
rectilinear propagation of light and reflection at planes
0
votes
1
answer
You are given three resistors of values 5Ω, 8Ω and 12Ω. Show in a circuit diagram how you would connect them so as to give:
asked
Jul 8, 2021
in
Physics Form 4
by
anonymous
electricity
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