Impedance Triangle

Q.

What is the relationship between ${\mathrm{E}}_{\mathrm{m}}$ (average voltage) and ${\mathrm{E}}_{\mathrm{o}}$ (peak voltage)?

Q. What is graph between reactance and angular frequency in L- C Ac series circuit

Q. The instantaneous values of current and emf in an ac circuit are $I=\frac{1}{\sqrt{2}}sin$ 314tamp and $E=\sqrt{2}sin(314t-\frac{\Pi }{6})$V respectively. The phase difference between E and I will be

1. $\frac{-\Pi }{6rad}$
2. $\frac{-\Pi }{3rad}$
3. $\frac{\Pi }{6rad}$
4. $\frac{\Pi }{3rad}$

Q. In a series LCR circit R = 10 $\Omega$ and the impedance Z = 20 $\Omega$ . Then the phase difference between the current and the voltage is

1. ${60}^{\circ }$
2. ${30}^{\circ }$
3. ${45}^{\circ }$
4. ${90}^{\circ }$