An electromagnetic wave with a peak electric field component of 1.2 * 102 N/C has what associated peak magnetic field value? (e0 = 8.85 * 10-12 C2/N*m2, m0 = 4p * 10-7 T*m/A and c = 3.00 * 108 m/s)

A) 4.0 * 10-7 T B) 3.6 * 1010 T C) 2.5 * 106 T D) 2.8 * 10-11 T A) 4.0 * 10-7 T B) 3.6 * 1010 T C) 2.5 * 106 T D) 2.8 * 10-11 T

Exam 21: Alternating Current Circuits and Electromagnetic Waves

A transformer is to be designed to increase the 30-kV (rms) output of a generator to the transmission line voltage of 345 kV (rms).If the primary winding has 80 turns, how many turns must the secondary have?

(Multiple Choice)

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Question 81

An electromagnetic wave is made up of which of the following oscillating quantities?

(Multiple Choice)

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Question 82

A radio wave transmits 1.2 W/m² average power per unit area.What is the peak value of the associated magnetic field? (m₀ = 4p * 10^-7 Tm/A and c = 3.00 10⁸ m/s)

(Multiple Choice)

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Question 83

The power dissipated in an AC series circuit increases as the phase angle approaches what value?

(Multiple Choice)

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Question 84

In an AC circuit, the ratio of average current to maximum current is:

(Multiple Choice)

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Question 85

An AC power generator produces 25 A (rms) at 3 600 V.The energy is transmitted through a long-distance power line, which has a total resistance of 100 W.What percentage of the power delivered by the generator is dissipated as heat in the long-distance line if a step-up transformer is not used?

(Multiple Choice)

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Question 86

Which one of the following scientists first built and operated devices that could emit and detect man-made electromagnetic radiation?

(Multiple Choice)

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Question 87

Peak values for a neodymium-glass laser are 600 J for 1 nanosecond.If the cross-section of the laser beam is 1 cm², what are the maximum values of E and B? (µ₀ = 4p * 10^-7 TFm/A, c = 3.00 10⁸ m/s)

(Multiple Choice)

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Question 88

An electromagnetic wave with a peak electric field component of 1.2 * 10² N/C has what associated peak magnetic field value? (e₀ = 8.85 * 10^-12 C²/Nm²,m₀ = 4p 10^-7 Tm/A and c = 3.00 10⁸ m/s)

(Multiple Choice)

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Question 89

An object that is giving off only infrared electromagnetic waves is giving off heat through:

(Multiple Choice)

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Question 90

Which of the following combinations of circuit components can be used to make a tuner for a radio, to select the desired frequency?

(Multiple Choice)

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Question 91

An electromagnetic wave with a peak magnetic field component of 1.5 * 10^-7 T carries what average power per unit area? (m₀ = 4p * 10^-7Tm/A, e₀ = 8.85 10^-12 C²/Nm² and c = 3.00 10⁸ m/s)

(Multiple Choice)

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Question 92

Of the various types of electromagnetic radiation, which is the most penetrating through all forms of matter?

(Multiple Choice)

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Question 93

A 12.0-mF capacitor is connected to an AC source with an rms voltage of 120 V and a frequency of 60.0 Hz.What is the rms current in the capacitor?

(Multiple Choice)

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Question 94

In an RLC series circuit, if the AC frequency is decreased to a very small value, what value does the phase angle between the current and voltage approach?

(Multiple Choice)

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Question 95

An AC voltage source, with a peak output of 120 V, results in dissipation of energy in a resistor at rate of 100 W.What is the value of the resistance?

(Multiple Choice)

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Question 96

The current in an inductor connected to an AC voltage source lags the voltage.This lag is caused by the:

(Multiple Choice)

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Question 97

In an RLC series circuit the phase angle between the current and voltages is 30 $\degree$ .If the AC frequency doubles, what is the resulting phase angle?

(Multiple Choice)

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Question 98

What is the impedance of an AC series circuit that is constructed of a 10.0-W resistor along with 12.0 W inductive reactance and 7.0 W capacitive reactance?

(Multiple Choice)

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Question 99

Showing 81 - 99 of 99

Exam 21: Alternating Current Circuits and Electromagnetic Waves

A transformer is to be designed to increase the 30-kV (rms) output of a generator to the transmission line voltage of 345 kV (rms).If the primary winding has 80 turns, how many turns must the secondary have?

An electromagnetic wave is made up of which of the following oscillating quantities?

A radio wave transmits 1.2 W/m2 average power per unit area.What is the peak value of the associated magnetic field? (m0 = 4p * 10-7 T*m/A and c = 3.00 * 108 m/s)

The power dissipated in an AC series circuit increases as the phase angle approaches what value?

In an AC circuit, the ratio of average current to maximum current is:

An AC power generator produces 25 A (rms) at 3 600 V.The energy is transmitted through a long-distance power line, which has a total resistance of 100 W.What percentage of the power delivered by the generator is dissipated as heat in the long-distance line if a step-up transformer is not used?

Which one of the following scientists first built and operated devices that could emit and detect man-made electromagnetic radiation?

Peak values for a neodymium-glass laser are 600 J for 1 nanosecond.If the cross-section of the laser beam is 1 cm2, what are the maximum values of E and B? (µ0 = 4p * 10-7 TF*m/A, c = 3.00 * 108 m/s)

An electromagnetic wave with a peak electric field component of 1.2 * 102 N/C has what associated peak magnetic field value? (e0 = 8.85 * 10-12 C2/N*m2, m0 = 4p * 10-7 T*m/A and c = 3.00 * 108 m/s)

An object that is giving off only infrared electromagnetic waves is giving off heat through:

Which of the following combinations of circuit components can be used to make a tuner for a radio, to select the desired frequency?

An electromagnetic wave with a peak magnetic field component of 1.5 * 10-7 T carries what average power per unit area? (m0 = 4p * 10-7 T*m/A, e0 = 8.85 * 10-12 C2/N*m2 and c = 3.00 * 108 m/s)

Of the various types of electromagnetic radiation, which is the most penetrating through all forms of matter?

A 12.0-mF capacitor is connected to an AC source with an rms voltage of 120 V and a frequency of 60.0 Hz.What is the rms current in the capacitor?

In an RLC series circuit, if the AC frequency is decreased to a very small value, what value does the phase angle between the current and voltage approach?

An AC voltage source, with a peak output of 120 V, results in dissipation of energy in a resistor at rate of 100 W.What is the value of the resistance?

The current in an inductor connected to an AC voltage source lags the voltage.This lag is caused by the:

In an RLC series circuit the phase angle between the current and voltages is 30 °\degree° .If the AC frequency doubles, what is the resulting phase angle?

What is the impedance of an AC series circuit that is constructed of a 10.0-W resistor along with 12.0 W inductive reactance and 7.0 W capacitive reactance?

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A radio wave transmits 1.2 W/m² average power per unit area.What is the peak value of the associated magnetic field? (m₀ = 4p * 10^-7 Tm/A and c = 3.00 10⁸ m/s)

Peak values for a neodymium-glass laser are 600 J for 1 nanosecond.If the cross-section of the laser beam is 1 cm², what are the maximum values of E and B? (µ₀ = 4p * 10^-7 TFm/A, c = 3.00 10⁸ m/s)

An electromagnetic wave with a peak electric field component of 1.2 * 10² N/C has what associated peak magnetic field value? (e₀ = 8.85 * 10^-12 C²/Nm²,m₀ = 4p 10^-7 Tm/A and c = 3.00 10⁸ m/s)

An electromagnetic wave with a peak magnetic field component of 1.5 * 10^-7 T carries what average power per unit area? (m₀ = 4p * 10^-7Tm/A, e₀ = 8.85 10^-12 C²/Nm² and c = 3.00 10⁸ m/s)

In an RLC series circuit the phase angle between the current and voltages is 30 $\degree$ .If the AC frequency doubles, what is the resulting phase angle?