Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015 C placed in air of permittivity. [ take \(\frac{1}{4\pi ε₀}\) = 9.0 x 10\(^9\)Nm\(^2\)C\(^{-2}\)]
A series R - L - C circuit is shown in the diagram above. Which of the following vector diagrams correctly represents the phase relationship among I, V, V\(_F\), V\(_C\), and V\(_L\), if V\(_C\) is greater than V\(_L\) and the symbols have their usual meaning?
If the current in the resistor R is 0.05 A, calculate the p.d across the inductor.
A capacitor of capacitance 25μF is connected to an a.c power source of frequency \(\frac{200}{π}\) Hz. Calculate the reactance of the capacitor.
The energy stored in a capacitor of capacitance 5μF is 40 J. Calculate the voltage applied across its terminals.
