- They have a much longer life than the lead-acid ones.
- They supply larger amounts of current and for a longer period.
- Can be left unused for months without any damage.
Wilfykil answered the question on March 23, 2019 at 11:18
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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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Distinguish between a primary cell and a secondary cell.
(Solved)
Distinguish between a primary cell and a secondary cell.
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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The figure below shows hollow negatively charged sphere with a metal disk attached to an insulator placed inside
(Solved)
The figure below shows hollow negatively charged sphere with a metal disk attached to an insulator placed inside. State what would happen to the leaf of an uncharged electroscope if the metal disk were brought near the cap of the electroscope. Give a reason for your answer.
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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State two other factors to be considered in constructing a capacitor other than the surface area of the plates.
(Solved)
State two other factors to be considered in constructing a capacitor other than the surface area of the plates.
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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The diagram below shows a circuit with a capacitor C and a lamp L. When the sketch is closed at Y, the lamp L lights....
(Solved)
The diagram below shows a circuit with a capacitor C and a lamp L. When the sketch is closed at Y, the lamp L lights. When the switch is closed at X, L does not light. Explain the observation.
Date posted:
March 23, 2019
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Answers (1)
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The fig shows sketches of two types of houses built in a lighting prone area. State with reason which house is safer to stay in...
(Solved)
The fig shows sketches of two types of houses built in a lighting prone area. State with reason which house is safer to stay in during lighting and thunderstorms?
Date posted:
March 23, 2019
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Answers (1)
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State the observation on the leaves of a positively charged electroscope when a negative charge is brought near it.
(Solved)
State the observation on the leaves of a positively charged electroscope when a negative charge is brought near it.
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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Record as accurately as possible the masses indicated by the pointer in figures A
(Solved)
Record as accurately as possible the masses indicated by the pointer in figures A
Date posted:
March 22, 2019
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Answers (1)