electric circuit is built up by connecting in series an alternating and sinusoidal power source of equency 50HZ, with an ohmic conductor of resistance r, and a coil of inductance L and resistance An ammeter connected in the circuit reads 3.5 A. A voltmeter across the power source reads O v. Given that the voltage across the ohmic conductor is U, = 120 V and the voltage across the l is Uz = 120 V. 16.) Determine the value of R. A) 23.3 Ω B) 33.8 Ω Q13.5 Ω D) 73.3 Ω E) 19.30 17.) Determine the value of L. A) 2.3 H B) 8.8 H C) 4.0 2 D) 13.2 H E) 7.6 H 18.) Determine an expression for the instantaneous current in the circuit. A) i(t) = 3.5 cos(100nt) B) i(t) = 3.5/2 cos(100rt) C) i(t) = 35 cos(100nt) D) i(t) = 35VZ cos(100nt) E) None of the above capacitor of capacitance C is added to the circuit in series. 19.) Determine the value of the capacitance C for which the effective current I remains the same thout changing the voltage. 1.3 x 10-*F B) 4.7 x 10-*F C) 7.7 x 10-6F D) 1.3 x 10-6F E) None of the above

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter18: Resistive-inductive Parallel Circuits
Section: Chapter Questions
Problem 1PA: Incandescent lighting of 500 W is connected in parallel with an inductive load. A clamp-on ammeter...
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Answer Q47, 48, 49

An electric circuit is built up by connecting in series an alternating and sinusoidal power source of
frequency 50HZ, with an ohmic conductor of resistance r, and a coil of inductance L and resistance
R. An ammeter connected in the circuit reads 3.5 A. A voltmeter across the power source reads
220 V. Given that the voltage across the ohmic conductor is U1 = 120 V and the voltage across the
coil is U, = 120 V.
Q46.) Determine the value of R.
A) 23.3 Ω B) 33.8 Ω Q 13.5 Ω D) 73.3 Ω Ε) 19.3 Ω
Q47.) Determine the value of L.
A) 2.3 H B) 8.8 H
C) 4.0 0 D) 13.2 H
E) 7.6 H
Q48.) Determine an expression for the instantaneous current in the circuit.
B) i(t) = 3.5/2 cos(100rt)
D) i(t) = 35/2 cos(100zt)
A) i(t) = 3.5 cos(100nt)
C) i(t) = 35 cos(100nt)
E) None of the above
A capacitor of capacitance C is added to the circuit in series.
Q49.) Determine the value of the capacitance C for which the effective current I remains the same
without changing the voltage.
A) 1.3 x 10-4F
B) 4.7 x 10-4F C) 7.7 x 10-6F
D) 1.3 x 10-6F
E) None of the above
Transcribed Image Text:An electric circuit is built up by connecting in series an alternating and sinusoidal power source of frequency 50HZ, with an ohmic conductor of resistance r, and a coil of inductance L and resistance R. An ammeter connected in the circuit reads 3.5 A. A voltmeter across the power source reads 220 V. Given that the voltage across the ohmic conductor is U1 = 120 V and the voltage across the coil is U, = 120 V. Q46.) Determine the value of R. A) 23.3 Ω B) 33.8 Ω Q 13.5 Ω D) 73.3 Ω Ε) 19.3 Ω Q47.) Determine the value of L. A) 2.3 H B) 8.8 H C) 4.0 0 D) 13.2 H E) 7.6 H Q48.) Determine an expression for the instantaneous current in the circuit. B) i(t) = 3.5/2 cos(100rt) D) i(t) = 35/2 cos(100zt) A) i(t) = 3.5 cos(100nt) C) i(t) = 35 cos(100nt) E) None of the above A capacitor of capacitance C is added to the circuit in series. Q49.) Determine the value of the capacitance C for which the effective current I remains the same without changing the voltage. A) 1.3 x 10-4F B) 4.7 x 10-4F C) 7.7 x 10-6F D) 1.3 x 10-6F E) None of the above
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