Question 1

The 90° phase angle results because ic depends on the rate of change of vc.

Accepted Answer

A) True 
 B)False  True

Question 2

In a series RC circuit, VR and I are

Accepted Answer

A)  in phase 
B)  out of phase by 45° 
C)  out of phase by 90° 
D)  out of phase by -90° 
A)  in phase 
B)  out of phase by 45° 
C)  out of phase by 90° 
D)  out of phase by -90° A

Question 3

When voltages are out of phase

Accepted Answer

A)  arithmetic addition can be used 
B)  phasor addition is not possible 
C)  they cannot be combined by any means 
D)  phasor addition is necessary 
A)  arithmetic addition can be used 
B)  phasor addition is not possible 
C)  they cannot be combined by any means 
D)  phasor addition is necessary D

Question 4

What is the total current when a 30mA IR is in parallel with another branch current of 40 mA for IC?

Accepted Answer

A)  5 mA 
B)  50 mA 
C)  500 mA 
D)  70 mA 
A)  5 mA 
B)  50 mA 
C)  500 mA 
D)  70 mA

Question 5

For any capacitor, what is the phase relationship between vc and ic for all values of capacitance or any frequency of sine wave alternating voltage?

Accepted Answer

A)  45° 
B)  90° 
C)  -90° 
D)  -45° 
A)  45° 
B)  90° 
C)  -90° 
D)  -45°

Question 6

Which law or theorem states that the hypotenuse is equal to the square root of the sum of the squares of the sides?

Accepted Answer

A)  Thevenin 
B)  Kirchhoff 
C)  Pythagorean 
D)  Norton 
A)  Thevenin 
B)  Kirchhoff 
C)  Pythagorean 
D)  Norton

Question 7

For a series RC circuit, when XC is equal to or greater than 10 times R, ZT is approximately _________ XC.

Accepted Answer

Question 8

Capacitive current is the same in all parts of a series circuit.

Accepted Answer

A) True 
 B)False

Question 9

If capacitance is increased and higher frequency sine-wave voltages are applied

Accepted Answer

A)  XC increases 
B)  XC decreases 
C)  XC remains unchanged 
D)  IC decreases 
A)  XC increases 
B)  XC decreases 
C)  XC remains unchanged 
D)  IC decreases

Question 10

The (number only) ______________ degree phase angle results because ic depends on the rate of change of vc.

Accepted Answer

Question 11

Capacitive reactance decreases with more capacitance and higher frequencies for sine-wave ac voltage applied.

Accepted Answer

A) True 
 B)False

Question 12

A series circuit has different voltage drops but one common ______________.

Accepted Answer

The answer of A series circuit has different voltage drops...

Question 13

For a series RC circuit, when R is equal to or greater than 10 times XC,

Accepted Answer

A)  ZT is approximately equal to R 
B)  ZT is approximately equal to C 
C)  ZT is equal to ?? 
D)  ZT is equal to 0 ? 
A)  ZT is approximately equal to R 
B)  ZT is approximately equal to C 
C)  ZT is equal to ?? 
D)  ZT is equal to 0 ?

Question 14

The resultant of the phasor addition of XC and R is their total opposition in ohms, called

Accepted Answer

A)  reactance 
B)  reluctance 
C)  resistance 
D)  impedance 
A)  reactance 
B)  reluctance 
C)  resistance 
D)  impedance

Question 15

Circuit values of I and V may be in rms, peak, peak-to-peak, or instantaneous, as long as the same measure is applied to the entire circuit.

Accepted Answer

A) True 
 B)False

Question 16

What circuit can be used to set the conduction time of semiconductors in power-control circuits?

Accepted Answer

A)  RC filter 
B)  Oscillator 
C)  Regulator 
D)  Phase-shifter 
A)  RC filter 
B)  Oscillator 
C)  Regulator 
D)  Phase-shifter

Question 17

For a capacitor, the value of charge or discharge current is zero when

Accepted Answer

A)  the capacitance is low 
B)  the capacitive reactance is high 
C)  dv/dt is a constant 
D)  dv/dt is zero 
A)  the capacitance is low 
B)  the capacitive reactance is high 
C)  dv/dt is a constant 
D)  dv/dt is zero

Question 18

Although capacitive voltage lags capacitive current by 90°, both waves have the same frequency.

Accepted Answer

A) True 
 B)False

Question 19

For a parallel RC circuit, when XC is equal to or greater than 10 times R

Accepted Answer

A)  ZEQ is approximately equal to R 
B)  ZEQ is approximately equal to XC 
C)  ZEQ is approximately 0 ? 
D)  ZEQ is approximately ?? 
A)  ZEQ is approximately equal to R 
B)  ZEQ is approximately equal to XC 
C)  ZEQ is approximately 0 ? 
D)  ZEQ is approximately ??

Question 20

For any capacitor, the 180° phase relationship between vc and ic exists for all values of capacitance or any frequency of sine wave alternating voltage.

Accepted Answer

A) True 
 B)False

Exam 19: Capacitive Circuits

The 90° phase angle results because ic depends on the rate of change of vc.

In a series RC circuit, VR and I are

When voltages are out of phase

What is the total current when a 30mA IR is in parallel with another branch current of 40 mA for IC?

For any capacitor, what is the phase relationship between vc and ic for all values of capacitance or any frequency of sine wave alternating voltage?

Which law or theorem states that the hypotenuse is equal to the square root of the sum of the squares of the sides?

For a series RC circuit, when XC is equal to or greater than 10 times R, ZT is approximately _________ XC.

Capacitive current is the same in all parts of a series circuit.

If capacitance is increased and higher frequency sine-wave voltages are applied

The (number only) ______________ degree phase angle results because ic depends on the rate of change of vc.

Capacitive reactance decreases with more capacitance and higher frequencies for sine-wave ac voltage applied.

A series circuit has different voltage drops but one common ______________.

For a series RC circuit, when R is equal to or greater than 10 times XC,

The resultant of the phasor addition of XC and R is their total opposition in ohms, called

Circuit values of I and V may be in rms, peak, peak-to-peak, or instantaneous, as long as the same measure is applied to the entire circuit.

What circuit can be used to set the conduction time of semiconductors in power-control circuits?

For a capacitor, the value of charge or discharge current is zero when

Although capacitive voltage lags capacitive current by 90°, both waves have the same frequency.

For a parallel RC circuit, when XC is equal to or greater than 10 times R

For any capacitor, the 180° phase relationship between vc and ic exists for all values of capacitance or any frequency of sine wave alternating voltage.

Introduction

Electricity

Resistors

Ohms Law

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Voltage Dividers and Current Dividers

Analog and Digital Multimeters

Kirchhoff S Laws

Network Theorems

Conductors and Insulators

Batteries

Magnetism

Electromagnetism

Alternating Voltage and Current

Capacitance

Capacitive Reactance

Inductance

Inductive Reactance

Inductive Circuits

RC and LR Time Constants

Alternating Current Circuits

Complex Numbers for Ac Circuits

Resonance

Filters

Three-Phase Ac Power Systems

Diodes and Diode Applications

Bipolar Junction Transistors

Transistor Amplifiers

Field Effect Transistors

Power Amplifiers

Thyristors

Operational Amplifiers

Filters

The 90° phase angle results because i_c depends on the rate of change of v_c.

In a series RC circuit, V_R and I are

What is the total current when a 30mA I_R is in parallel with another branch current of 40 mA for I_C?

For any capacitor, what is the phase relationship between v_c and i_c for all values of capacitance or any frequency of sine wave alternating voltage?

For a series RC circuit, when X_C is equal to or greater than 10 times R, Z_T is approximately _________ X_C.

The (number only) ______________ degree phase angle results because i_c depends on the rate of change of v_c.

For a series RC circuit, when R is equal to or greater than 10 times X_C,

The resultant of the phasor addition of X_C and R is their total opposition in ohms, called

For a parallel RC circuit, when X_C is equal to or greater than 10 times R

For any capacitor, the 180° phase relationship between v_c and i_c exists for all values of capacitance or any frequency of sine wave alternating voltage.