Heating Effect of an Electric Current 1. Give the formula of electrical power. P= V x I P= (V x V)/RP= I x I x R All of the aboveQuestion 1 of 11 2. Joules Law states that the heating effect of a current is as described by the formula H= I x I x R x t True False MaybeNone Question 2 of 11 3. The following procedure for simplifying Joules Law CORRECT i) H= I x I x R x t ii) H= I x V x t iii) H= (V x V x t )/R (Since V=IR and I = V/R). True or False? True False Maybe NoneQuestion 3 of 11 4. Give the formula of work done in pushing a charge round an electrical circuit Work = distance x time Work = V x I x t W= V x V x tNone Question 4 of 11 5. The amount of work needed to keep current flowing through a high resistance wire (coil,is much greater than the work needed to keep current flowing through a low resistance wire (coil)? False True Maybe None Question 5 of 11 6. The SI UNIT of electrical power is? Joules Coulomb Watt Farad Question 6 of 11 7. State an example of an application of the heating effect of an electric current. Filament lamp Fluorescent lamp Fuses All of the aboveQuestion 7 of 11 8. Mention the 2 main categories of applications of the heating effect of an electric current. Electric lighting Electric heating Electric Shock electric alarmQuestion 8 of 11 9. Name the 3 factors which affect the heating effect of an electric current? Current applied Time Resistance of conductor All of the above Question 9 of 11 10. Joules Law states that the energy developed in a wire proportional to: The square of the current I squared (for a given resistance and time)The time (for a given resistance and current)The resistance R of the wire (for a given current and time)All of the above Question 10 of 11 11. The more the resistance of a wire/ conductor the more the amount of work needed to keep current flowing through it. True or False? True FALSEMaybe None Question 11 of 11 Loading...