Question 1

The average power input to a series alternating current circuit is minimum when

Accepted Answer

A)   there are only a resistor and capacitor in the circuit.
B)   there are only a resistor and inductor in the circuit.
C)   there is only a resistor in the circuit.
D)   XL = XC and the circuit contains a resistor, an inductor and a capacitor.
E)   there is only a capacitor in the circuit.F) A) and D)
G) C) and D)

Question 2

All three circuits below have R = 100 Ω, C = 1.0 mF and emf ε = (5.0 V)  sin (377 t) . The inductors in (B)  and (C)  are placed sufficiently far apart so that they do not alter one another's inductance. Such inductors add combine like resistors. Which statement regarding the angular resonance frequencies ωA, ωB and ωC is correct? A, ωB and ωC is correct?   A)  ωC > ωA = ωB B)  ωC A = ωB C)  ωA = ωB = ωC D)  ωB A = ωC E)  ωB > ωA = ωC" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   ωC > ωA = ωB
B)   ωC A = ωB
C)   ωA = ωB = ωC
D)   ωB A = ωC
E)   ωB > ωA = ωCF) A) and B)
G) A) and E)

Question 3

Find the resonant frequency for a series RLC circuit where R = 10Ω, C = 5.00 μF, and L = 2.00 mH.

Accepted Answer

A)   998 Hz
B)   1.59 kHz
C)   2.45 kHz
D)   11.3 kHz
E)   2.53 kHzF) B) and D)
G) C) and D)

Question 4

For driving voltage V = Vm sin ωt, the current through the resistor is m sin ωt, the current through the resistor is   A)  Vm sin (ωt + φ)  B)  Vm cos (ωt + φ)  C)    sin (ωt + φ)  D)    sin (ωt + φ)  E)    sin ωt" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   Vm sin (ωt + φ) 
B)   Vm cos (ωt + φ) 
C)  m sin ωt, the current through the resistor is   
A)   Vm sin (ωt + φ)  
B)   Vm cos (ωt + φ)  
C)     sin (ωt + φ)  
D)     sin (ωt + φ)  
E)     sin ωt" class="answers-bank-image d-inline" rel="preload" > sin (ωt + φ) 
D)  m sin ωt, the current through the resistor is   
A)   Vm sin (ωt + φ)  
B)   Vm cos (ωt + φ)  
C)     sin (ωt + φ)  
D)     sin (ωt + φ)  
E)     sin ωt" class="answers-bank-image d-inline" rel="preload" > sin (ωt + φ) 
E)  m sin ωt, the current through the resistor is   
A)   Vm sin (ωt + φ)  
B)   Vm cos (ωt + φ)  
C)     sin (ωt + φ)  
D)     sin (ωt + φ)  
E)     sin ωt" class="answers-bank-image d-inline" rel="preload" > sin ωtF) B) and C)
G) B) and E)

Question 5

An electric heater draws an average power of 1100 Watts when plugged into a 110 V-rms outlet. Calculate the resistance of the heater and the rms current.

Accepted Answer

A)   11Ω, 10 A (rms) 
B)   110Ω, 10 A (rms) 
C)   10Ω, 11 A (rms) 
D)   10Ω, 110 A (rms) 
E)   0.09Ω, 11 A (rms) F) C) and D)
G) None of the above

Exam 33: Alternating-Current Circuits

Find the resonant frequency for a series RLC circuit where R = 10Ω, C = 5.00 μF, and L = 2.00 mH.

Correct Answer
verified

Correct Answer
verified

The average power input to a series alternating current circuit is minimum when

Correct Answer
verified

An electric heater draws an average power of 1100 Watts when plugged into a 110 V-rms outlet. Calculate the resistance of the heater and the rms current.

Correct Answer
verified

For driving voltage V = V_m sin ωt, the current through the resistor is

Correct Answer
verified

Exam 33: Alternating-Current Circuits

Find the resonant frequency for a series RLC circuit where R = 10Ω, C = 5.00 μF, and L = 2.00 mH.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The average power input to a series alternating current circuit is minimum when

Correct AnswerverifiedShow Answer

An electric heater draws an average power of 1100 Watts when plugged into a 110 V-rms outlet. Calculate the resistance of the heater and the rms current.

Correct AnswerverifiedShow Answer

For driving voltage V = Vm sin ωt, the current through the resistor is

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For driving voltage V = V_m sin ωt, the current through the resistor is

Correct Answer
verified