Heating Effect of an Electric Current

1. Give the formula of electrical power.

Question 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

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?

Question 3 of 11

4. Give the formula of work done in pushing a charge round an electrical circuit

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)?

Question 5 of 11

6. The SI UNIT of electrical power is?

Question 6 of 11

7. State an example of an application of the heating effect of an electric current.

Question 7 of 11

8. Mention the 2 main categories of applications of the heating effect of an electric current.

Question 8 of 11

9. Name the 3 factors which affect the heating effect of an electric current?

Question 9 of 11

10. Joules Law states that the energy developed in a wire proportional to:

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?

Question 11 of 11