What is the phase relationship between current and voltage in a capacitive circuit when an AC signal is applied?

The current leads the voltage by 90°.

Fill in the blank: The equation for the voltage across a capacitor at any instant in an RC circuit is given by EC = E(1− e^{−t/RC}). In this equation, EC represents ______.

The voltage across the capacitor

True or False: In an inductive circuit, the current lags the voltage by 90°.

True.

Which of the following is NOT a type of passive filter? A) Low-pass B) High-pass C) Band-pass D) Amplifier

D) Amplifier

Riddle: I am a network that allows low frequencies to pass and blocks high ones, with a cutoff frequency defined at -3 dB. What am I?

Low-pass filter

What is the cutoff frequency formula for a first order low-pass filter?

Fc = 1/(2πRC)

Fill in the blank: The impedance of an AC circuit is given by Z = ______, where XC and XL are the reactances of the capacitor and inductor respectively.

√(VR² + (VL - VC)²)

True or False: The voltage across the capacitor is maximum when the current through it is maximum.

False. The voltage across the capacitor is zero when the current is maximum.

What is the effect of the temperature on the voltage divider circuit used in a strain gauge sensor?

The voltage at the junction is independent of temperature if the temperature coefficients of resistance are the same.

Which component causes a phase shift of -135° in a third order filter?

The third order filter.