When a deep freezer is switched off and unplugged, there is typically no voltage present. When an appliance is disconnected from the power source, the voltage supply is interrupted, and the electrical potential difference (voltage) drops to zero. Therefore, in this state, the deep freezer does not have any voltage. It is important to exercise caution when handling any electrical appliance and avoid contact with live electrical components even when the appliance is switched off and unplugged.