i) A – Grid
B- Electron gun
ii) C – Vertical deflection of the beam
D- Horizontal deflection of the beam
iii) – By thermionic emission as heating the filament
iv) Tube is evacuated to eliminate collisions of cathode rays with air molecules.
sharon kalunda answered the question on April 5, 2019 at 08:50
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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)
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An electric kettle is rated 3KW, 250V. Determine the resistance of the coil
(Solved)
An electric kettle is rated 3KW, 250V. Determine the resistance of the coil
Date posted:
April 5, 2019
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Answers (1)
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Given that a lamp is rated 45W 240V. Calculate the resistance of the heating element.
(Solved)
Given that a lamp is rated 45W 240V. Calculate the resistance of the heating element.
Date posted:
April 5, 2019
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Answers (1)
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What is the relationship between periodic time and frequency of a progressive wave?
(Solved)
What is the relationship between periodic time and frequency of a progressive wave?
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows water waves crossing a boundary between deep and shallow water. Complete the diagram to show the wave in the deep region
(Solved)
The figure below shows water waves crossing a boundary between deep and shallow water
Complete the diagram to show the wave in the deep region.
Date posted:
April 5, 2019
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Answers (1)
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How many cubic centimeters make a gram?
(Solved)
How many cubic centimeters make a gram?
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows two loudspeakers L1 and L2 connected to a signal generator.
(Solved)
The figure below shows two loudspeakers L1 and L2 connected to a signal generator.
An observer walks along the line 0-01 (equidistant from L1 and L2) and another along the
Line AA1.Explain the observation made by each and give reasons to your answer
Date posted:
April 5, 2019
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Answers (1)
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The diagram below represents plane wave fronts produced in a ripple tank.
(Solved)
The diagram below represents plane wave fronts produced in a ripple tank.
Given that the distance AB is 15 cm, determine the wavelength of the wave
Date posted:
April 5, 2019
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Answers (1)
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Calculate the pressure of the gas supply (Atmospheric pressure = 1.0x105Pa)
(Solved)
Calculate the pressure of the gas supply (Atmospheric pressure = 1.0x105Pa)
Date posted:
April 5, 2019
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Answers (1)
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Water of mass 200g at temperature of 60°Cis put in a well lagged copper calorimeter of mass
80g. A piece of ice at 0° C and...
(Solved)
Water of mass 200g at temperature of 60°Cis put in a well lagged copper calorimeter of mass
80g. A piece of ice at 0° C and mass 20g is placed in the calorimeter and the mixture stirred
gently until all the ice melts. The final temperature, T, of the mixture is then measured.
Determine:
i) The heat absorbed by the melting ice at O°C
ii) The heat absorbed by the melted ice (water) to rise to temperature T (answer may be
given in terms of T)
iii) The heat lost by the warm water and the calorimeter (answer may be given in terms of T)
iv) The final temperature of the mixture
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows to light pith balls arranged as shown.
State what is observed when air is blown on the outer sides of the pith...
(Solved)
The figure below shows to light pith balls arranged as shown.
State what is observed when air is blown on the outer sides of the pith balls.
Date posted:
April 5, 2019
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Answers (1)
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A person’s lung pressure as recorded by a mercury manometer is 90 mm Hg. Express this
pressure in SI units.
(Solved)
A person’s lung pressure as recorded by a mercury manometer is 90 mm Hg. Express this
pressure in SI units.
Date posted:
April 5, 2019
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Answers (1)
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The graph below represents a graph of stopping potential Vs , V against frequency f, Hz
(Solved)
The graph below represents a graph of stopping potential Vs , V against frequency f, Hz
Use the graph to determine:
(i) The threshold frequency of the metal
(ii) Plank’s constant
(iii) Work function of the metal
Date posted:
April 5, 2019
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Answers (1)
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State and explain two features of a hydrometer that make it sensitive in its function
(Solved)
State and explain two features of a hydrometer that make it sensitive in its function
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows a balloon carrying hydrogen gas 3m3 of density 0.09kgm-3. The mass
of the balloon fabric is 2kg and the density of air...
(Solved)
The figure below shows a balloon carrying hydrogen gas 3m3 of density 0.09kgm-3. The mass
of the balloon fabric is 2kg and the density of air is 1.25kgm-3
i) Determine the tension in the string
ii) If the string is suddenly cut, calculate the acceleration of the balloon upwards
iii) What is the maximum mass of the equipment the balloon can lift at a constant velocity
Date posted:
April 5, 2019
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Answers (1)
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A measuring cylinder contains 50cm3 of light oil at 0oC. When a lump of dried ice is placed in
the oil, the total volume is 72cm3....
(Solved)
A measuring cylinder contains 50cm3 of light oil at 0oC. When a lump of dried ice is placed in
the oil, the total volume is 72cm3. Determine the density of the ice.
Date posted:
April 5, 2019
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Answers (1)
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A piece of metal N of mass 2kg weighs 18N in water and 12N in liquid M. Determine the density
of ;
(i) The metal N
(ii) The...
(Solved)
A piece of metal N of mass 2kg weighs 18N in water and 12N in liquid M. Determine the density
of ;
(i) The metal N
(ii) The liquid M
Date posted:
April 5, 2019
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Answers (1)
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A bathroom shower has 200 holes each 2.5mm2 in area. Water flows from a pipe of cross-section
area of 15cm2 at 5m/s to the shower. Determine...
(Solved)
A bathroom shower has 200 holes each 2.5mm2 in area. Water flows from a pipe of cross-section
area of 15cm2 at 5m/s to the shower. Determine the speed of the spray.
Date posted:
April 5, 2019
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Answers (1)
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A ship of mass 1300 tonnes floats on sea water:
(i) What volume of sea water is displaced (Density of sea water is 1025kg/m3)
(ii) Suppose it...
(Solved)
A ship of mass 1300 tonnes floats on sea water:
(i) What volume of sea water is displaced (Density of sea water is 1025kg/m3)
(ii) Suppose it sails from sea water to fresh water, what cargo must be removed so that
the same volume of water is displaced? (Density of fresh water = 1000kg/m3
Date posted:
April 5, 2019
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Answers (1)
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The figure below represents a ray of light falling normally on the curved surface of a
semi- circular glass block A at an angle of 32°...
(Solved)
The figure below represents a ray of light falling normally on the curved surface of a
semi- circular glass block A at an angle of 32° at O and emerging into air at an angle of 48°
Calculate the absolute refractive index of the glass of which the block is made.
(Assume air is a vacuum)
Date posted:
April 4, 2019
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Answers (1)