Q7.30Multiple choice
For an LCR circuit driven at frequency ω, the equation reads Fig. 7.6 di q L + Ri + = vi = vm sin ωt dt C
This question refers to a figure in the original PDF.
- (i)Multiply the equation by i and simplify where possible.
- (ii)Interpret each term physically.
- (iii)Cast the equation in the form of a conservation of energy statement.
- (iv)Intergrate the equation over one cycle to find that the phase difference between v and i must be acute.