Ten questions. The result tells you which lessons you may skip.
The mains in India is \(220\,\text{V}\), \(50\,\text{Hz}\). Its peak voltage and angular frequency are
An AC ammeter reads \(3\,\text{A}\). The peak current is
A square-wave current switches between \(+2\,\text{A}\) and \(-2\,\text{A}\). Its rms value is
Two voltages of peaks \(30\,\text{V}\) and \(40\,\text{V}\) and the same frequency differ in phase by \(90°\). The peak of their sum is
In a pure inductor on an alternating supply, the current
A \(100\,\mu\text{F}\) capacitor on the \(220\,\text{V}\), \(50\,\text{Hz}\) mains carries an rms current of about
A series circuit has \(R = 30\,\Omega\), \(X_L = 80\,\Omega\) and \(X_C = 40\,\Omega\) on \(200\,\text{V}\). The current is
A series LCR circuit has \(L = 0.1\,\text{H}\) and \(C = 10\,\mu\text{F}\). It resonates at
A load takes \(4\,\text{A}\) from \(200\,\text{V}\) with a power factor of \(0.6\). Its average power is
A choke is used in place of a resistor to limit an alternating current because