Suspend each of them in the earth’s magnetic field. Change their rest position and record the final direction in which key will rest. Repeat this procedure several times and record the directions. Do this experiment on each of the rods. It is noted that, the magnetized rod will rest in the earths North-south direction each time it is disturbed. The unmagnetised rod rests in random directions.
Wilfykil answered the question on March 25, 2019 at 05:48
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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)
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Explain how to calculate the efficiency of the pulley system when the weight of load and effort is given
(Solved)
Explain how to calculate the efficiency of the pulley system when the weight of load and effort is given.
Date posted:
March 19, 2019
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Answers (1)
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A vacuum pump was used to pump out air from the glass tube immersed in liquids as shown in the figure below . After sometimes...
(Solved)
A vacuum pump was used to pump out air from the glass tube immersed in liquids as shown in figure below.
After sometimes the level of paraffin rose to position X.mark Y,the corresponding positions for the water level .Give a reason for your answer.
Date posted:
March 18, 2019
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Answers (1)
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A metre rule is pivoted at the 20cm mark and it hangs at the 90cm mark from a spring balance 75g wt. Where is the...
(Solved)
A metre rule is pivoted at the 20cm mark and it hangs at the 90cm mark from a spring balance 75g wt. Where is the centre of gravity of the metre rule if it weighs 125g?
Date posted:
March 2, 2019
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Answers (1)