DEFINE AMPERE, WATTS, OHM’S LAW, VOLT AND STATE THE USES OF METERS AND FUSES – NABTEB QUESTION

ELECTRICAL TERM

i) Amperes – measure the rate of flow of a current and can be obtained by dividing the watts by the volts.

A = W/V

WHERE A = AMPERES; W = WATTS; V = VOLTAGE

ii) Watts – measure power – i.e. the rate at which any electrical appliance is using electric current for a given pressure.

(Voltage) W= V X A
WHERE: W= WATTS; A= AMPERES; V= VOLTAGE

iii) Ohm’s law – measure the resistance of the wires to the passage of electricity and is comparable with the friction offered by a water pipe to water flowing through it

This can be stated as follows:
OHMS= VOLTS/AMPERES

iv) Volts– measure pressure of the flow, comparing electricity to water, ‘voltage ‘corresponding to pounds per square inch of a water supply. Before electricity can flow through a wire the electrical pressure at one of the wire must be greater than at the other end.
Volts= ohms x amperes

USES OF METERS AND FUSES

i. Meters– record the amount of electricity used in kilowatt-hours in the kitchen
ii. Fuses– act as a safety device. They are used in the kitchen as follows:
(a) Lighting circuits
(b) Radial circuits
(c) Cooker or ring circuits