Ten questions. The result tells you which lessons you may skip.
An alternating voltage is \(v = 5\sin(100\pi t + \pi/6)\) volts. Its frequency is
A particle in SHM of period \(1.2\,\text{s}\) leaves its mean position. The time it takes to reach half of its amplitude is
The amplitude of \(3\sin\omega t + 4\sin(\omega t + \pi/2)\) is
The largest value of \(6\sin\omega t + 8\cos\omega t\) is
Two coherent waves, each of intensity \(I_0\), meet in phase. The resultant intensity is
Two coherent sources are in phase. At a point where the path difference is \(3\lambda/2\), the waves
Two tuning forks of \(512\,\text{Hz}\) and \(516\,\text{Hz}\) sound together. The number of beats heard in one second is
In the standing wave \(y = [2A\sin kx]\cos\omega t\), neighbouring nodes are separated by
A series circuit has \(R = 30\,\Omega\), \(X_L = 80\,\Omega\) and \(X_C = 40\,\Omega\). Its impedance is
At resonance in a series LCR circuit, the angle between the supply voltage and the current is