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Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below...
(Solved)
Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below shows a tape chart consisting of 10-tick strips that
he obtained.
Calculate the
a. total distance travelled
b. average velocity
c. acceleration of the trolley
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer...
(Solved)
The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer has a frequency of 50 Hz, determine the
acceleration of the trolley.
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.
(Solved)
The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.
Calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley
Date posted:
April 10, 2019
.
Answers (1)
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The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find...
(Solved)
The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find the
a. Initial velocity at A
b. Final velocity at B
c. Acceleration of the toy car.
Date posted:
April 10, 2019
.
Answers (1)
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A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life
(Solved)
A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life
Date posted:
April 5, 2019
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Answers (1)
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The figure shows the circuit of a modern X-ray tube
(Solved)
The figure shows the circuit of a modern X-ray tube
Name the part labeled C and state its function
Date posted:
April 5, 2019
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Answers (1)
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An x-ray tube is operating with an anode potential of 12Kv and a current of 10.0m.A:
(Solved)
An x-ray tube is operating with an anode potential of 12Kv and a current of 10.0m.A:
(i) Calculate the number of electrons hitting the anode per second
(ii) Determine the velocity with which the electrons strike the target
Date posted:
April 5, 2019
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Answers (1)
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Three identical bulbs are connected in series with a battery of dry cells. At first the bulbs
shine brightly but gradually become dimmer. Using the same...
(Solved)
Three identical bulbs are connected in series with a battery of dry cells. At first the bulbs
shine brightly but gradually become dimmer. Using the same cells, explain how you
would increase the brilliance of the bulbs
Date posted:
April 5, 2019
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Answers (1)
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A girl opened up a used up dry cell and found the following:
i) The zinc casing was ‘eaten away’
ii) The cell was watery
(Solved)
A girl opened up a used up dry cell and found the following:
i) The zinc casing was ‘eaten away’
ii) The cell was watery
Name the cell defect
Date posted:
April 5, 2019
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Answers (1)
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State one reason why colour televisions have a higher power rating than black and white
televisions
(Solved)
State one reason why colour televisions have a higher power rating than black and white
televisions
Date posted:
April 5, 2019
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Answers (1)
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The figure shows a simple cell made of copper and zinc electrodes dipped in dilute
sulphuric acid
(Solved)
The figure shows a simple cell made of copper and zinc electrodes dipped in dilute
sulphuric acid.
a) Identify the cathode
b) If a voltmeter is connected across the rods the reading is observed to reduce with time.
State two causes of this observation
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows the set up for a simple cell.
(Solved)
The figure below shows the set up for a simple cell.
a) Name the Electrode A and the solution B
b) State two reasons why the bulb goes off after a short time
Date posted:
April 5, 2019
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Answers (1)
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Distinguish between Topping and Dopping
(Solved)
Distinguish between Topping and Dopping
Date posted:
April 5, 2019
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Answers (1)
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Explain why eight 1.5V cells arranged in series to give a total of 12V cannot be used to start
a car. But car battery of 12V...
(Solved)
Explain why eight 1.5V cells arranged in series to give a total of 12V cannot be used to start
a car. But car battery of 12V starts a car
Date posted:
April 5, 2019
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Answers (1)
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Explain how conductivity of a semiconductor changes with increase in temperature
(Solved)
Explain how conductivity of a semiconductor changes with increase in temperature
Date posted:
April 5, 2019
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Answers (1)
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The diagram below shows a simple cell:-
(Solved)
The diagram below shows a simple cell:-
(i) Name z and solution y
(ii) Name and explain the defect that occurs at plate z
(iii) Give one method of preventing the defect that occurs at the copper plate
Date posted:
April 5, 2019
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Answers (1)
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The diagram below shows a wrongly wired three pin plug.
(Solved)
The diagram below shows a wrongly wired three pin plug.
(i) Indicate in the diagram above the correct colors for the wiring
(ii) State the use of device marked X
Date posted:
April 5, 2019
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Answers (1)
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The figure below represents part of an electric cooker coil.
(Solved)
The figure below represents part of an electric cooker coil.
i) State why the part labeled W is coiled
(ii) State the property of material X that makes it suitable for its use
Date posted:
April 5, 2019
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Answers (1)
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The diagram below represents a cathode ray oscilloscope (CRO)
(Solved)
The diagram below represents a cathode ray oscilloscope (CRO)
i) Name the parts labeled A and B
ii) What are the functions of C and D?
iii) State how electrons are produced
iv) Give a reason why the tube is evacuated.
Date posted:
April 5, 2019
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Answers (1)
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State one reason why a C.R.O is a more accurate voltmeter than a moving coil voltmeter
(Solved)
State one reason why a C.R.O is a more accurate voltmeter than a moving coil voltmeter
Date posted:
April 5, 2019
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Answers (1)