E = IR + Ir
3.0 = I(3.5 + 0.5) = I (4.0)
I = 0.75A
sharon kalunda answered the question on April 4, 2019 at 11:45
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In figure the voltmeter reads 2.1V when the switch is closed, the voltmeter reads 1.8v and
the ammeter 0.1 A
(Solved)
In figure the voltmeter reads 2.1V when the switch is closed, the voltmeter reads 1.8v and
the ammeter 0.1 A
Determine:
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ii) The internal resistance of the cell
iii) The resistance of the of the lamp
Date posted:
April 4, 2019
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Answers (1)
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A car starting from rest accelerated uniformly for 5minutes to reach 30m/s. it continues at this speed for the next 20minutes and then decelerates uniformly...
(Solved)
A car starting from rest accelerated uniformly for 5minutes to reach 30m/s. it continues at this speed for the next 20minutes and then decelerates uniformly to come to a stop in 10minutes. On the axes provided, sketch the graph of the velocity against time for the motion of the car.
Date posted:
April 4, 2019
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Answers (1)
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A footballer kicks a ball of mass 0.6kg initially at rest using a force of 720N. If the foot was in
contact with the ball 0.1seconds,...
(Solved)
A footballer kicks a ball of mass 0.6kg initially at rest using a force of 720N. If the foot was in
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Date posted:
April 4, 2019
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Answers (1)
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A boy is standing between two cliffs A and B but nearer to cliff A than B. He stands 160m
from wall BA and shouts once....
(Solved)
A boy is standing between two cliffs A and B but nearer to cliff A than B. He stands 160m
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Date posted:
April 4, 2019
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Answers (1)
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A lady holds a large concave mirror of focal length 1.8m from her face. State two
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(Solved)
A lady holds a large concave mirror of focal length 1.8m from her face. State two
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Date posted:
April 4, 2019
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Answers (1)
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By use of a ray; diagram, show how a concave mirror may be a dentist mirror
(Solved)
By use of a ray; diagram, show how a concave mirror may be a dentist mirror
Date posted:
April 4, 2019
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Answers (1)
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The figure below shows an object placed in front of a plane mirror. Draw appropriate rays to
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(Solved)
The figure below shows an object placed in front of a plane mirror. Draw appropriate rays to
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Date posted:
April 4, 2019
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Answers (1)
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Figure shows an object O being viewed using two inclined mirrors M1 and M2. Complete
the diagram by sketching rays to show the position of the...
(Solved)
Figure shows an object O being viewed using two inclined mirrors M1 and M2. Complete the diagram by sketching rays to show the position of the image as seen by the eye -E.
Date posted:
April 4, 2019
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Answers (1)
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What is meant by the term spherical aberration?
(Solved)
What is meant by the term spherical aberration?
Date posted:
April 4, 2019
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Answers (1)
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Complete the ray diagram to show the position of the image
(Solved)
Complete the ray diagram to show the position of the image
Date posted:
April 4, 2019
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Answers (1)
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Complete the diagram below to show the shape of the wave fronts after passing the gap
(Solved)
Complete the diagram below to show the shape of the wave fronts after passing the gap
Date posted:
April 4, 2019
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Answers (1)
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What is the relationship between periodic time and the frequency of a progressive wave?
(Solved)
What is the relationship between periodic time and the frequency of a progressive wave?
Date posted:
April 4, 2019
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Answers (1)
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The figure below shows a magnetic material being magnetized
(Solved)
The figure below shows a magnetic material being magnetized
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Date posted:
April 4, 2019
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Answers (1)
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The figure below shows a diagram of a simple electric generator
(Solved)
The figure below shows a diagram of a simple electric generator
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Date posted:
April 4, 2019
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Answers (1)
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Arrange the following types of waves in order of increasing frequency:-Ultra-violet radiation,
visible light, radio waves and x-rays
(Solved)
Arrange the following types of waves in order of increasing frequency:-Ultra-violet radiation,
visible light, radio waves and x-rays
Date posted:
April 4, 2019
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Answers (1)
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The diagram below shows a ferromagnetic material being magnetized by the method shown
(Solved)
The diagram below shows a ferromagnetic material being magnetized by the method shown
On the axes given below, sketch a graph to show how the strength of the magnet being created
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Date posted:
April 4, 2019
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Answers (1)
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Suggest one method of decreasing the sensitivity of a moving coil meter
(Solved)
Suggest one method of decreasing the sensitivity of a moving coil meter
Date posted:
April 4, 2019
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Answers (1)
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Using a well- labeled diagram explain how a moving coil meter works
(Solved)
Using a well- labeled diagram explain how a moving coil meter works
Date posted:
April 4, 2019
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Answers (1)
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The resistance of a length of power transmitting cable is 20ohms and is used to transmit 12KV
at a current of 1A. If the voltage is...
(Solved)
The resistance of a length of power transmitting cable is 20ohms and is used to transmit 12KV
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Date posted:
April 4, 2019
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Answers (1)
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State one way through which energy is lost in a transformer and give a remedy for it.
(Solved)
State one way through which energy is lost in a transformer and give a remedy for it.
Date posted:
April 4, 2019
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Answers (1)