Tracks due to gamma radiation
Tracks due to gamma radiation are generally scanty and disjointed. These tracks do not come directly from the source but from electrons released by the gas atoms when they are struck by gamma radiation. The electrons then produce their own tracks.
Moraa orina answered the question on April 12, 2018 at 07:26
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State the characteristics of beta radiation
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State the characteristics of beta radiation
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April 12, 2018
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State the characteristics of alpha radiation
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State the characteristics of alpha radiation
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April 12, 2018
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What are the applications of photoelectric effect?
(Solved)
What are the applications of photoelectric effect?
Date posted:
April 12, 2018
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The threshold wavelength of a photoemissive surface is 0.45µm. calculate:
a. The threshold frequency of the surface.
b. The workfunction of the surface in eV.
c. The minimum...
(Solved)
The threshold wavelength of a photoemissive surface is 0.45µm. calculate:
a. The threshold frequency of the surface.
b. The workfunction of the surface in eV.
c. The minimum speed with which a photoelectron is emitted if the frequency of the radiation is 7.5x1014Hz.
Date posted:
April 12, 2018
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Calculate the energy of a photon of light of frequency 5.0x1014Hz in (a) joules (b) electron-volt.
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Calculate the energy of a photon of light of frequency 5.0x1014Hz in (a) joules (b) electron-volt.
Date posted:
April 12, 2018
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State any differences between x-rays and cathode rays.
(Solved)
State any differences between x-rays and cathode rays.
Date posted:
April 12, 2018
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An x-ray tube operates at 10kV and a current of 15mA. Calculate the number of electrons hitting the target per second.
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An x-ray tube operates at 10kV and a current of 15mA. Calculate the number of electrons hitting the target per second.
Date posted:
April 12, 2018
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Answers (1)
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Calculate the energy of x-rays whose frequency is 3x1016Hz.(Take h=6.63x10-9Js, e=1.6x10-19C, me=9.11x10-6kg and v=3.0x108m/s)
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Calculate the energy of x-rays whose frequency is 3x1016Hz.(Take h=6.63x10-9Js, e=1.6x10-19C, me=9.11x10-6kg and ?=3.0x108m/s)
Date posted:
April 12, 2018
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Answers (1)
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State the uses of X-Rays
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State the uses of X-Rays.
Date posted:
April 12, 2018
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Explain how X-Rays are produced
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Explain how X-Rays are produced
Date posted:
April 12, 2018
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State the uses of the Cathode Ray Oscilloscope (CRO)
(Solved)
State the uses of the Cathode Ray Oscilloscope (CRO)
Date posted:
April 12, 2018
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State the components of a cathode ray oscilloscope
(Solved)
State the components of a cathode ray oscilloscope
Date posted:
April 12, 2018
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An electric cooker has an oven rated 3 kW, a grill rated 2 kW and two rings each rated 500 W. The cooker operates from a 240V...
(Solved)
An electric cooker has an oven rated 3 kW, a grill rated 2 kW and two rings each rated 500 W. The cooker
operates from a 24 0V mains. What is the cost of operating all the parts for 5 minutes if electricity costs Sh 1.50 per unit?
Date posted:
April 11, 2018
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Answers (1)
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A six bulb arrangement in a house runs for 8 hours every night for 5 days. If each bulb is rated 100 W and the cost of...
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A six bulb arrangement in a house runs for 8 hours every night for 5 days. If each bulb is rated 100 W and the cost of electrical energy is sh. 2.60 per unit, how much will the owner of the house pay at the end of the five days?
Date posted:
April 11, 2018
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Answers (1)
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An electric cooker has an oven rated 3kW, a grill rated 2kW and two rings each rated 500W. The cooker operates from 240V...
(Solved)
An electric cooker has an oven rated 3kW, a grill rated 2kW and two rings each rated 500W. The cooker
operates from 240V mains. Would a 5A fuse be suitable for the cooker assuming that all the parts are switched
on?
Date posted:
April 11, 2018
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Answers (1)
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A power station produces 50kW at 240V. The power is transmitted through cables with a resistance of 0.4?. Calculate the percentage power loss during...
(Solved)
A power station produces 50kW at 240V. The power is transmitted through cables with a resistance of
0.4?. Calculate the percentage power loss during transmission.
Date posted:
April 11, 2018
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Answers (1)
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Some length of a power line has a resistance of 10? and is transmitting 11kV and a current of 1A. If the
voltage is stepped...
(Solved)
Some length of a power line has a resistance of 10Ω and is transmitting 11kV and a current of 1A. If the
voltage is stepped up to 160kV by a transformer, calculate:
a) The initial power loss
b) The power loss after step up
Date posted:
April 11, 2018
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State the main causes of energy losses in transformers:
(Solved)
State the main causes of energy losses in transformers:
Date posted:
April 11, 2018
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A student designed a transformer to supply a current of 10A at a potential difference of 60V to an electric motor from an ac supply...
(Solved)
A student designed a transformer to supply a current of 10A at a potential difference of 60V to an electric motor from an ac supply of 240V. if the efficiency of the transformer is 80%, calculate:
a) The power supplied to the transformer.
b) The current in the primary coil
Date posted:
April 11, 2018
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Answers (1)
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Calculate the number of turns of the secondary coil of a step down transformer which would enable a 12V bulb
to be used with a...
(Solved)
Calculate the number of turns of the secondary coil of a step down transformer which would enable a 12V bulb
to be used with a 240V ac supply if there are 480 turns in the primary coil.
Date posted:
April 11, 2018
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Answers (1)