13. Four 8 Ω speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers ________.
(a) 18 W (b) 1.5 W (c) 48 W (d) 72 W
Answer
Answer : (d)
Explanation
Explanation : No answer description available for this question. Let us discuss.
5555555555 17. Five 100 Ω resistors are connected in parallel. If one resistor is removed, the total resistance is ________. (a) 25 Ω (b) 500 Ω (c) 100 Ω (d) 20 Ω
5555555555 9. A 47 Ω resistor and a capacitor with 150 Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is ________. (a) Z = 47 Ω + j150 Ω (b) Z = 47 Ω – j150 Ω (c) Z = 197 Ω (d) Z = 103 Ω
5555555555 12. A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately ________. (a) 790 Ω (b) 470 Ω (c) 60 Ω (d) 30 Ω
5555555555 16. A balanced Wheatstone bridge consists of an RV of 3,500 Ω, an R2 of 200 Ω, and an R3 of 680 Ω. The value of RUNK is ________. (a) 680 Ω (b) 1,029 Ω (c) 200 Ω (d) 880 Ω
5555555555 3. When a 1.6 kΩ resistor and a 120 Ω resistor are connected in parallel, the total resistance is ________. (a) greater than 1.6 kΩ (b) greater than 120 Ω but less than 1.6 kΩ (c) less than 120 Ω but greater than 100 Ω (d) less than 100 Ω