Physics

7 years ago

A 50.0-mH inductor is connected in series with a 2500-Ω resistor. What is the phase angle at 3000 ...

A 50.0-mH inductor is connected in series with a 2500-Ω resistor. What is the phase angle at 3000 Hz?
A) 20.7°
B) - 20.7°
C) -75.9°
D) 75.9°
E) 90.0°

tankster 113 1 Reply

7 years ago

What inductance must be put in series with a 200-Ω resistor at 4000 Hz to have a total impedance of ...

What inductance must be put in series with a 200-Ω resistor at 4000 Hz to have a total impedance of 240 Ω?
A) 3.28 mH
B) 4.28 mH
C) 5.28 mH
D) 6.28 mH
E) 12 mH

Northa 90 1 Reply

7 years ago

What resistance must be put in series with a 30-mH inductor at 4000 Hz to have a total impedance of ...

What resistance must be put in series with a 30-mH inductor at 4000 Hz to have a total impedance of 8.0 × 104 Ω?
A) 30 × 104 Ω
B) 5.0 × 104 Ω
C) 6.0 × 104 Ω
D) 7.0 × 104 Ω
E) 8.0 × 104 Ω

tankster 106 1 Reply

7 years ago

An ac signal at a certain frequency is applied across a 40-mH inductor and a 100-Ω resistor. If the ...

An ac signal at a certain frequency is applied across a 40-mH inductor and a 100-Ω resistor. If the power factor of this circuit is 0.40, what is the value of the frequency?
A) 160 Hz
B) 200 Hz
C) 410 Hz
D) 600 Hz
E) 910 Hz

Brelou 58 1 Reply

7 years ago

A certain ac signal at 1000 Hz is applied across an inductor and a 100-Ω resistor. If the power ...

A certain ac signal at 1000 Hz is applied across an inductor and a 100-Ω resistor. If the power factor of the circuit is 0.400, what is the impedance of this circuit?
A) 150 Ω
B) 200 Ω
C) 250 Ω
D) 100 Ω
E) 300 Ω

Brelou 56 1 Reply

7 years ago

A certain ac signal at 60 Hz is applied across a 40-mH inductor and a 200-Ω resistor. What is the ...

A certain ac signal at 60 Hz is applied across a 40-mH inductor and a 200-Ω resistor. What is the power factor of this circuit?
A) 0.249
B) 0.497
C) 0.697
D) 0.997
E) None of the other answers is correct.

tankster 58 1 Reply

7 years ago

A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a 100-Ω resistor. What is ...

A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a 100-Ω resistor. What is the rms value of the voltage across the inductor?
A) 0.700 V
B) 119 V
C) 100 V
D) 13.5 V
E) 120 V

tankster 51 1 Reply

7 years ago

A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a 100-Ω resistor. What is ...

A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a 100-Ω resistor. What is the rms value of the voltage across the resistor?
A) 119 V
B) 60.0 V
C) 100 V
D) 110 V
E) 0.700 V

Brelou 61 1 Reply

7 years ago

A 120-V rms signal at 60 Hz is applied across a 30-mH inductor and a 100-Ω resistor. What is the ...

A 120-V rms signal at 60 Hz is applied across a 30-mH inductor and a 100-Ω resistor. What is the rms value of the current in this circuit?
A) 0.80 A
B) 1.2 A
C) 1.4 A
D) 1.6 A
E) 1.8 A

Brelou 58 1 Reply

7 years ago

A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a resistor. If the rms value ...

A 120-V rms signal at 60.0 Hz is applied across a 30.0-mH inductor and a resistor. If the rms value of the current in this circuit is 0.600 A, what is the value of the resistor?
A) 80.0 Ω
B) 268 Ω
C) 143 Ω
D) 200 Ω
E) 30.0 Ω

Northa 76 1 Reply

7 years ago

A 120-V rms voltage at 1000 Hz is applied to a resistor and an inductor in series. If the impedance ...

A 120-V rms voltage at 1000 Hz is applied to a resistor and an inductor in series. If the impedance of this circuit is 110 Ω, what is the maximum value of the current?
A) 1.54 A
B) 1.09 A
C) 1.84 A
D) 1.04 A
E) None of the ot

tankster 94 1 Reply

7 years ago

At what frequency will a 20.00-mH inductor have an inductive reactance of 100.0 Ω?

At what frequency will a 20.00-mH inductor have an inductive reactance of 100.0 Ω?
A) 225.4 Hz
B) 654 .8 Hz
C) 795.7 Hz
D) 457.4 Hz
E) None of the other answers is correct.

tankster 155 1 Reply

7 years ago

A 100-Ω resistor is connected in series with a 10-mH inductor across an ac source operating at 1000 ...

A 100-Ω resistor is connected in series with a 10-mH inductor across an ac source operating at 1000 Hz. What is the impedance of this circuit?
A) 100 Ω
B) 118 Ω
C) 200 Ω
D) 236 Ω
E) 1000 Ω

tankster 107 1 Reply

7 years ago

A 120-V rms voltage at 60 Hz is applied across an inductor and a 200-Ω resistor. If the impedance ...

A 120-V rms voltage at 60 Hz is applied across an inductor and a 200-Ω resistor. If the impedance of this circuit is 216 Ω, what is the rms value of the current?
A) 0.336 A
B) 0.446 A
C) 0.556 A
D) 0.667 A
E) 0.767 A

Northa 71 1 Reply

7 years ago

The power factor of an RL circuit with a 100-Ω resistor and a certain inductor is 0.60. What is the ...

The power factor of an RL circuit with a 100-Ω resistor and a certain inductor is 0.60. What is the impedance of the circuit?
A) 170 Ω
B) 85 Ω
C) 340 Ω
D) 100 Ω
E) 60 Ω

Brelou 91 1 Reply

7 years ago

The inductive reactance of a 20.0-mH inductor at a certain frequency is 120 Ω. What is the ...

The inductive reactance of a 20.0-mH inductor at a certain frequency is 120 Ω. What is the frequency in Hz?
A) 120 Hz
B) 167 Hz
C) 478 Hz
D) 6000 Hz
E) 955 Hz

Northa 108 1 Reply

7 years ago

The inductive reactance of a 20-mH inductor at a certain frequency is 120 Ω. What is the frequency ...

The inductive reactance of a 20-mH inductor at a certain frequency is 120 Ω. What is the frequency in rad/s?
A) 2000 rad/s
B) 4000 rad/s
C) 5000 rad/s
D) 6000 rad/s
E) 7000 rad/s

tankster 126 1 Reply

7 years ago

What is the inductive reactance of a 20-mH inductor at a frequency of 60 Hz?

What is the inductive reactance of a 20-mH inductor at a frequency of 60 Hz?
A) 7.5 Ω
B) 0.13 Ω
C) 1.2 Ω
D) 1.2 mΩ
E) 7.5 mΩ

Northa 251 1 Reply

7 years ago

The circuit power factor of an RC circuit is 0.620. The rms value of the voltage applied to this ...

The circuit power factor of an RC circuit is 0.620. The rms value of the voltage applied to this signal is 120 V and the impedance is 200 Ω. What is the average power of this circuit?
A) 44.6 W
B) 89.2 W
C) 60.0 W
D) 0.620 W

tankster 124 1 Reply

7 years ago

A 120-V rms voltage at 60.0 Hz is applied across a capacitor and a 100-Ω resistor. If the impedance ...

A 120-V rms voltage at 60.0 Hz is applied across a capacitor and a 100-Ω resistor. If the impedance of this circuit is 200 Ω, what is the average power of this circuit?
A) 278 W
B) 72.0 W
C) 36.0 W
D) 100 W
E) 200 W

tankster 83 1 Reply

7 years ago

A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the ...

A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A and it leads the voltage by 60°. What is the value of the resistance in this circuit?
A) 100 Ω
B) 150 Ω
C) 120 Ω
D

Northa 91 1 Reply

7 years ago

A 120-V rms voltage at 60 Hz is applied across a 20-μF capacitor and an unknown resistor. If the ...

A 120-V rms voltage at 60 Hz is applied across a 20-μF capacitor and an unknown resistor. If the rms value of the current in that circuit is 0.60 A, what is the value of the resistor?
A) 60 Ω
B) 120 Ω
C) 180 Ω
D) 150 Ω
E) 200

tankster 84 1 Reply

7 years ago

A capacitor with a capacitive reactance of 40.0 Ω is connected in series with a 100-Ω resistor ...

A capacitor with a capacitive reactance of 40.0 Ω is connected in series with a 100-Ω resistor across an ac source of frequency 60.0 Hz. What is the phase angle?
A) +68.2°
B) -68.2°
C) -21.8°
D) +21.8°
E) 90.0°

tankster 86 1 Reply

7 years ago

A 60.0-μF capacitor is in series with a 100-Ω resistor connected across an ac source of frequency ...

A 60.0-μF capacitor is in series with a 100-Ω resistor connected across an ac source of frequency 120 Hz. What is the phase angle?
A) -12.4°
B) +12.4°
C) -77.6°
D) +77.6°
E) 90.0°

Brelou 69 1 Reply

7 years ago

The total impedance of an RC circuit with a resistance of 200 Ω is 1060 Ω. If the frequency of the ...

The total impedance of an RC circuit with a resistance of 200 Ω is 1060 Ω. If the frequency of the applied voltage is 20.0 Hz, what is the value of the capacitance in this circuit?
A) 6.64 μF
B) 7.64 μF
C) 8.64 μF
D) 9.64 μF

tankster 86 1 Reply

7 years ago

A 120-V rms voltage is applied across a 6.00-μF capacitor and a 100-Ω resistor. If the frequency ...

A 120-V rms voltage is applied across a 6.00-μF capacitor and a 100-Ω resistor. If the frequency of the generator is 60.0 Hz, what is the impedance of this circuit?
A) 153 Ω
B) 453 Ω
C) 353 Ω
D) 253 Ω
E) 553 Ω

Brelou 88 1 Reply

7 years ago

A 120 V-rms voltage is applied across a 6.0-μF capacitor and a 100-Ω resistor. If the frequency of ...

A 120 V-rms voltage is applied across a 6.0-μF capacitor and a 100-Ω resistor. If the frequency of the generator is 60 Hz, what is the rms value of the current in the circuit?
A) 0.26 A
B) 0.36 A
C) 0.46 A
D) 0.56 A
E) 0.76 A

tankster 121 1 Reply

7 years ago

A 120-V rms voltage at 90 Hz is applied across a 20-μF capacitor and a 100-Ω resistor. What is the ...

A 120-V rms voltage at 90 Hz is applied across a 20-μF capacitor and a 100-Ω resistor. What is the rms value of the current in that circuit?
A) 0.6 A
B) 0.7 A
C) 0.8 A
D) 0.9 A
E) 1.0 A

tankster 129 1 Reply

7 years ago

A 120-V rms voltage is applied across a 6.0-μF capacitor. If the frequency of the generator is 60 ...

A 120-V rms voltage is applied across a 6.0-μF capacitor. If the frequency of the generator is 60 Hz, what is the rms value of the current in the circuit?
A) 0.47 A
B) 0.37 A
C) 0.071 A
D) 0.17 A
E) 0.27 A

Brelou 91 1 Reply

7 years ago

A 6.0-μF capacitor is connected to an ac signal with a frequency of 60 Hz. If the maximum voltage ...

A 6.0-μF capacitor is connected to an ac signal with a frequency of 60 Hz. If the maximum voltage applied to the capacitor is 8.0 V, what is the capacitive reactance?
A) 6.0 Ω
B) 440 Ω
C) 7.5 × 10-6 Ω
D) 740 Ω
E) 160 Ω

tankster 78 1 Reply

7 years ago

The maximum voltage of an ac signal is 8.0 V. What is the rms value of this voltage?

The maximum voltage of an ac signal is 8.0 V. What is the rms value of this voltage?
A) 2.8 V
B) 5.7 V
C) 6.2 V
D) 4.0 V
E) 16.0 V

tankster 105 1 Reply

7 years ago

In a RLC circuit, the values of the inductance and capacitance are both halved. In comparison with ...

In a RLC circuit, the values of the inductance and capacitance are both halved. In comparison with the resonance frequency of the original circuit, the new resonant frequency will be
A) the same as before.
B) reduced to one-half the origina

tankster 59 1 Reply

7 years ago

In a RLC circuit, the values of the inductance and capacitance are both doubled. In comparison with ...

In a RLC circuit, the values of the inductance and capacitance are both doubled. In comparison with the resonance frequency of the original circuit, the new resonant frequency will be
A) the same as before.
B) reduced to one-half the origin

Brelou 80 1 Reply

7 years ago

Consider a series circuit in which the capacitive reactance equals the inductive reactance. What is ...

Consider a series circuit in which the capacitive reactance equals the inductive reactance. What is the phase angle between current and voltage?
A) +180.°
B) +90.°
C) -180.°
D) -90.°
E) 0.°

tankster 109 1 Reply

7 years ago

Resonance in a series RLC circuit occurs when

Resonance in a series RLC circuit occurs when
A) XL is greater than XC.
B) XC is greater than XL.
C) (XL - XC) is equal to R2.
D) (XL - XC)2 is equal to R2.
E) XC equals XL.

Brelou 75 1 Reply

7 years ago

Consider an RLC series circuit. The impedance of the circuit increases if XC increases.0

Consider an RLC series circuit. The impedance of the circuit increases if XC increases.
A) true only if XL is greater than or equal to XC
B) true only if XL is less than or equal to XC
C) always true
D) never true

Brelou 157 1 Reply

7 years ago

In a RLC circuit, a second capacitor is connected in parallel with the capacitor previously in the ...

In a RLC circuit, a second capacitor is connected in parallel with the capacitor previously in the circuit. What is the effect of this change on the impedance of the circuit?
A) It increases.
B) It decreases.
C) It does not change.

tankster 94 1 Reply

7 years ago

In a RLC circuit, a second capacitor is connected in series with the capacitor previously in the ...

In a RLC circuit, a second capacitor is connected in series with the capacitor previously in the circuit. What is the effect of this change on the impedance of the circuit?
A) It increases.
B) It decreases.
C) It does not change.

Brelou 110 1 Reply

7 years ago

The circuit power factor of an RL circuit connected across an ac source is one. What would be a good ...

The circuit power factor of an RL circuit connected across an ac source is one. What would be a good description of the frequency of this source?
A) Low
B) Very low
C) High
D) Very high

tankster 88 1 Reply