51.
What is the circuit’s impedance?
A. 1192
B. 843
C. 723
D. 511
Answer & Explanation
Answer: Option A
Explanation:
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52.
In an ac circuit, a capacitor and an output resistor are connected in series with an ac signal. What filter action will be the result?
A. bandpass B. low-pass
C. high-pass D. band-stop
Answer & Explanation
Answer: Option C
Explanation:
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53.
What is the impedance of this circuit?
A. 5928
B. 2000
C. 1902
D. 1798
Answer & Explanation
Answer: Option A
Explanation:
Impedance Cannot be Directly Measured, We Need to find Xc first.
So,
Xc = 1/2πfC.
Xc = 1/( 2 x 3.14 x 5000 x 0.01 x 10-6 ).
Xc = 3184.7.
Z = Sqrt( Xc2 + R2 ).
Z = Sqrt( 3184.72 + 50002 ).
Z = 5928 Ω.
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54.
What is the reactive power?
A. 6.8 mW
B. 9.8 mW
C. 12.8 mW
D. 15.8 mW
Answer & Explanation
Answer: Option B
Explanation:
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55.
A practical capacitor
A. is a short to dc
B. looks like a capacitor in parallel with a resistor
C. is an open to ac
D. stores energy in a magnetic field
Answer & Explanation
Answer: Option B
Explanation:
No answer description available for this question