  We investigate the viability of MHD waves, in particular acoustic p-modes, in
causing strong current accumulation at the null points. We begin with a
three-dimensional numerical setup incorporating a gravitationally stratifed
solar atmosphere and an axially symmetric magnetic feld including a coronal
magnetic null point. To excite waves, we employ wave drivers mimicking global
p-modes. We found that most of the vertical velocity transmits through the
Alfv\'en acoustic equipartition layer maintaining acoustic nature while a small
fraction generates fast waves via the mode conversion process. The fast waves
undergo almost total refection at the transition region due to sharp gradients
in density and Alfv\'en speed. There are only weak signatures of Alfv\'en wave
generation near the transition region due to fast-to-Alfv\'en mode conversion.
Since the slow waves propagate with the local sound speed, they are not much
afected by the density gradients at the transition region and undergo secondary
mode conversion and transmission at the Alfv\'en-acoustic equipartition layer
surrounding the null point, leading to fast wave focusing at the null point.
These fast waves have associated perturbations in current density, showing
oscillatory signatures compatible with the second harmonic of the driving
frequency which could result in resistive heating and enhanced intensity in the
presence of fnite resistivity. We conclude that MHD waves could be a potential
source for oscillatory current dissipation around the magnetic null point. We
conjecture that besides oscillatory magnetic reconnection, global p-modes could
lead to the formation of various quasiperiodic energetic events.
