Static induction applies to which of the following equations?

• A. E = Φ/t
• B. R = V/I
• C. Z = √R2 + X2
• D. Xc = 1/(2πfC)

Answer: (A)

Static induction relates to charge transfer and the effects of an electric field on a conductive body. The equation E = Φ/t represents the relationship between electromotive force (E), magnetic flux (Φ), and time (t). This equation describes how an electromotive force is induced in a circuit due to a change in magnetic flux over time, which is a fundamental principle in electromagnetic induction.

In the context of static induction, the concept refers to how electric charges can be influenced by electric fields without the physical movement of electrical charges through a conductor. The induced voltage in this case can be represented by the change in magnetic flux over time, providing a direct link to the process defined in the equation E = Φ/t.

The other equations, while important in different aspects of electrical science, do not directly relate to static induction. The equation R = V/I deals with Ohm's law, relating resistance to voltage and current. The equation Z = √R² + X² refers to impedance in AC circuits and combines resistance and reactance. Finally, the equation Xc = 1/(2πfC) describes capacitive reactance, focusing on the relationship between frequency, capacitance, and reactance. These concepts are critical in their own right, but