PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A purely resistive heater is connected to an a.c. mains supply whose instantaneous voltage is given by v(t)=2002sin(314t)V.
(i) Identify the angular frequency of the supply and hence calculate its frequency.
(ii) Determine the period of the supply voltage.
(iii) Calculate the number of complete cycles that occur in a time interval of 0.040s.