I=I0sinωtI=I_{0} \sin \omega tI=I0sinωt
I=2I0sin2ωtI=2I_{0} \sin 2 \omega tI=2I0sin2ωt
I=2I0sinωtI=2I_{0} \sin \omega tI=2I0sinωt
I=I0sin2ωtI=I_{0} \sin 2\omega tI=I0sin2ωt