Heating Effect of an Electric Current 1. 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 1 of 11 2. 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 2 of 11 3. The SI UNIT of electrical power is? Joules Coulomb Watt Farad Question 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. Give the formula of electrical power. P= V x I P= (V x V)/RP= I x I x R All of the aboveQuestion 5 of 11 6. Mention the 2 main categories of applications of the heating effect of an electric current. Electric lighting Electric heating Electric Shock electric alarmQuestion 6 of 11 7. 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 7 of 11 8. Name the 3 factors which affect the heating effect of an electric current? Current applied Time Resistance of conductor All of the above Question 8 of 11 9. 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 9 of 11 10. State an example of an application of the heating effect of an electric current. Filament lamp Fluorescent lamp Fuses All of the aboveQuestion 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...