a) What is a wattmeter ?

b) How many terminals has got the wattmeter ?

c) Describe briefly the composition of the wattmeter ?

d) The power received by R is minimum when R tends to its maximum value (100 ohms ). Why ?

e) What is the value of R if the cursor is half-way ?

f) Calculate the value of the power received by R when the cursor is half-way.

g) Calculate the value of current I flowing through R (cursor half-way).

h) Calculate the value of R from the previous value and comment.