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The figure below shows two parallel current- carrying conductors A and B placed close to each other. The direction of the current is into the...
(Solved)
The figure below shows two parallel current- carrying conductors A and B placed close to each other. The direction of the current is into the plane of the paper. Copy the diagram and on the same figure;
(i) Sketch the magnetic field pattern
(ii) indicate the force F due to the current on each conductor
Date posted:
March 25, 2019
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Answers (1)
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One way of demagnetizing bar is to place it in a solenoid in which an alternating current (ac) flows. How is the demagnetization achieved?
(Solved)
One way of demagnetizing bar is to place it in a solenoid in which an alternating current (ac) flows. How is the demagnetization achieved?
Date posted:
March 25, 2019
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Answers (1)
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You are provided with two iron bars, X and Y, one is magnetized and the other is not. Explain how you would identify the magnetized...
(Solved)
You are provided with two iron bars, X and Y, one is magnetized and the other is not. Explain how you would identify the magnetized bar without using a magnet.
Date posted:
March 25, 2019
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Answers (1)
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The figure shows a wire in a magnetic field. A current is switched on to flow through the wire in the direction shown. State the...
(Solved)
The figure shows a wire in a magnetic field. A current is switched on to flow through the wire in the direction shown. State the direction of motion of the wire.
Date posted:
March 25, 2019
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Answers (1)
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The graph in the figure below shows the relationship between the attractive forces of an electromagnetic and the magnetizing current. Give reasons for the shape...
(Solved)
The graph in the figure below shows the relationship between the attractive forces of an electromagnetic and the magnetizing current. Give reasons for the shape of the curve in terms of the domain theory.
Date posted:
March 25, 2019
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Answers (1)
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When ammeter is connected between the two plates of a simple cell, the pointer deflects along the scale. Explain
(Solved)
When ammeter is connected between the two plates of a simple cell, the pointer deflects along the scale. Explain
Date posted:
March 23, 2019
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Answers (1)
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Explain clearly the precautionary measures you would take to maintain the efficiency of an accumulator?
(Solved)
Explain clearly the precautionary measures you would take to maintain the efficiency of an accumulator?
Date posted:
March 23, 2019
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Answers (1)
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A student wishes to investigate the relationship between current and voltage for a certain device X. In the space provided, draw a circuit diagram including...
(Solved)
A student wishes to investigate the relationship between current and voltage for a certain device X. In the space provided, draw a circuit diagram including two cells, rheostat, ammeter, voltmeter and the device X that would be suitable in obtaining the desired results.
Date posted:
March 23, 2019
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Answers (1)
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A current of 0.08A passes in a circuit for 2.5 minutes. How much charge passes through a point in the circuit?
(Solved)
A current of 0.08A passes in a circuit for 2.5 minutes. How much charge passes through a point in the circuit?
Date posted:
March 23, 2019
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Answers (1)
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What current will a 500O resistor connected to a source of 240V draw?
(Solved)
What current will a 500Ω resistor connected to a source of 240V draw?
Date posted:
March 23, 2019
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Answers (1)
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A student learnt that a battery of eight dry cells each 1.5V has a total e.m.f of 12V the same as a car battery. He...
(Solved)
A student learnt that a battery of eight dry cells each 1.5V has a total e.m.f of 12V the same as a car battery. He connected in series eight new dry batteries to his car but found that they could not start the engine. Give a reason for this observation
Date posted:
March 23, 2019
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Answers (1)
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The figure below shows an arrangement of capacitors connected to a 10V d.c supply. Determine:(i) The charge stored in the 2µ F capacitor.(ii) The total capacitance...
(Solved)
The figure below shows an arrangement of capacitors connected to a 10V d.c supply. Determine:
(i) The charge stored in the 2µ F capacitor.
(ii) The total capacitance of the arrangement.
Date posted:
March 23, 2019
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Answers (1)
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State two ways of charging the magnitude of the deflection of the leaf of an electroscope.
(Solved)
State two ways of charging the magnitude of the deflection of the leaf of an electroscope.
Date posted:
March 23, 2019
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Answers (1)
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State the precaution that is taken when charging a metal object
(Solved)
State the precaution that is taken when charging a metal object
Date posted:
March 23, 2019
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Answers (1)
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In the clothing and textile industries the machines experiences electrostatics forces at certain points
(Solved)
In the clothing and textile industries the machines experiences electrostatics forces at certain points. Suggest one method of reducing these forces.
Date posted:
March 23, 2019
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Answers (1)
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Two isolated and insulated spheres A and B carry the same positive charge. Sketch the electric lines of force of their field when placed close...
(Solved)
Two isolated and insulated spheres A and B carry the same positive charge. Sketch the electric lines of force of their field when placed close to each other but not touching some.
Date posted:
March 23, 2019
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Answers (1)
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Name two types of forces which can act between objects without contact.
(Solved)
Name two types of forces which can act between objects without contact.
Date posted:
March 22, 2019
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Answers (1)
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State with reason the purpose of the oil that circulates in a motorcar engine.
(Solved)
State with reason the purpose of the oil that circulates in a motorcar engine.
Date posted:
March 22, 2019
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Answers (1)
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In the study of a free fall, it is assumed that the force f acting on a given body of mass m is gravitational, given...
(Solved)
In the study of a free fall, it is assumed that the force f acting on a given body of mass m is gravitational, given by F= mg. State two other forces that act on the same body.
Date posted:
March 22, 2019
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Answers (1)
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A student was heard saying “the mass of a ball on the moon is one sixth its mass on earth”. Give a reason why this...
(Solved)
A student was heard saying “the mass of a ball on the moon is one sixth its mass on earth”. Give a reason why this statement is wrong.
Date posted:
March 22, 2019
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Answers (1)