Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.

Referring to the given circuit, find Z<sub>TH</sub> for the part of the circuit that is external to RL.<br> <img src="/images/question-image/electrical-engineering/circuit-theorems-in-ac-analysis/1526018808-30.png" title="Circuit Theorems In Ac Analysis mcq question image" alt="Circuit Theorems In Ac Analysis mcq question image">

Referring to the given circuit, find Z_TH if VS is 180° V.
Circuit Theorems In Ac Analysis mcq question image

A

9.82 ∠-51.3° kΩ

B

9.38 ∠-51.3° kΩ

C

180 ∠-38.3° kΩ

D

19.2 ∠-38.3° kΩ

Referring to the given circuit, find Z_TH if R is 15 kΩ and RL is 38 kΩ.
Circuit Theorems In Ac Analysis mcq question image

A

89.82 ∠-51.3° kΩ

B

19.2 ∠-38.3° kΩ

C

9.38 ∠-51.3° kΩ

D

180 ∠-38.3° kΩ

For the given circuit, find V_TH for the circuit external to RL.
Circuit Theorems In Ac Analysis mcq question image

A

4.69 ∠51.3° V

B

4.69 ∠38.7° V

C

469 ∠38.7° mV

D

6 ∠0° V

Referring to the given circuit, what is V_TH if VS = 12 ∠0° V?
Circuit Theorems In Ac Analysis mcq question image

A

4.69 ∠38.7° V

B

9.38 ∠38.7° V

C

12 ∠0° V

D

6 ∠0° V

Referring to the given circuit, L
Circuit Theorems In Ac Analysis mcq question image

A

Must be in parallel with RL

B

Must be placed in parallel with VS

C

Must have a reactance equal to XC

D

Has no effect on the result

Referring to the given circuit, what is Z_TH if R1 is changed to 220 Ω?
Circuit Theorems In Ac Analysis mcq question image

A

225 ∠12.1° Ω

B

225 ∠77.9° Ω

C

46 ∠77.9° Ω

D

46 ∠12.1° Ω

Referring to the given circuit, determine Z_TH as seen by RL.
Circuit Theorems In Ac Analysis mcq question image

A

1444 ∠-48.5° Ω

B

4176 ∠-73.3° Ω

C

956 ∠-48.5° Ω

D

1444 ∠-73.3° Ω

Referring to the given circuit, how much power, in watts, is delivered to the speaker at the determined frequency if VS = 4.5 VRMS?
Circuit Theorems In Ac Analysis mcq question image

A

226 mW

B

2.26 mW

C

4.24 mW

D

424 mW

For the circuit shown, determine Z_TH for the portion of the circuit external to RL.
Circuit Theorems In Ac Analysis mcq question image

A

66.7 ∠-33.7° kΩ

B

6.67 ∠-333.7° kΩ

C

14.4 ∠-56.3° kΩ

D

1.44 ∠-33.7° kΩ

Referring to the given figure, determine Z_TH as seen by RL if R1 is changed to 3.3 kΩ.
Circuit Theorems In Ac Analysis mcq question image

A

1488 ∠-70.7° Ω

B

3859 ∠-31.2° Ω

C

5180 ∠-50.5° Ω

D

1828 ∠-50.2° Ω

Referring to the given circuit, find Z_TH for the part of the circuit that is external to RL.

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