Final answer:
The relationship between magnetic field and time is described by Faraday's law of electromagnetic induction, whereas the relationship between voltage and time can be seen in the charging or discharging of a capacitor.
Step-by-step explanation:
In physics, the relationship between magnetic field and time is described by Faraday's law of electromagnetic induction. According to this law, an emf (electromotive force) or induced voltage is generated in a conductor when it experiences a changing magnetic field.
The relationship between voltage and time can be seen in the context of capacitor charging or discharging. When a capacitor is charging, the voltage across the capacitor increases over time. Conversely, during discharging, the voltage across the capacitor decreases over time.