3 theorems. 1 Calculate the current flowing through the 1 kO resistor in the given circuit using Norton's 55.6kΩ R = 1kΩ 7.27 mA • 2.2 ΚΩ 8 mA
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- A dwelling with a general lighting load of 10,000 VA requires a minimum of how many 15 A branch circuits? A. 10 B. 3 C. 8 D. 6A copper conductor wire with a total length of 100ft is used in a 15 amp common household circuit has a resistance of 1.62 ohms/1000ft. If the circuit is fully loaded, what is the power loss in the conductor? a. 52.0 W b. 29.25 W c. None of these d. 36.45 W e. 2.43 WThe illumination of a drawing office 30 m x 10 m is to have a value of 250 lux and is to be provided by a number of 300 W lamps, each lamp having an output of 14 lumens per watt. CU = 0.40, MF = 0.90. Determine the number of lamps of required. Show detailed solution. No solution. No points.
- A wire 480 meters long has a resistance of 9.580Ω and a diameter of 2.6mm. What type of material is being used.A copper conductor wire with a total length of 100ft is used in a 15 amp common household circuit has a resistance of 1.62 ohms/1000ft. If the circuit is fully loaded, approximate the resistance of the conductor? a. 129.6 ohms b. None of these c. 0.130 ohm d. 162 ohms e. 0.162 ohmA 15 – ft length of wire with a cross – sectional area of 127 cmils has a resistance of 8.74 ohms at20 0C. What material is the wire made from? (1 cmil = 0.7854 x 10 – 6in2)
- R1=12 ohms, V1=27v, L=57mH, C=1000 micro farad, R2=7 ohms, F=50HzIt is required to provide illumination of 150 meter- candle in a factory hall 45 m x 15 m. . Assume that the depreciation factor is 0.80, the coefficient of utilization is 0.40 and the efficiency of the lamp is 20 lumens per watt. Calculate the number of 250 W lamps. a. 60 b. 72 c. 63 d. 56Use the following values: r=160 ZR= 4 Ohms Write the final answer to at least 5 significant figures
- 8 Volts with 220ohms Measured I in 8 Volts =0.037A Measured V in 8 volts = 7.95v Computed power P=VI=0.2942 P=I^2xR=0.3012 P=V^2/R=0.2909 What is the general conclusion in words and formula about the relationship between i and v when R is any value?1)A moving coil instrument gives a full scale deflection of 30mA, when the potential difference of 60mV is applied. To measure 500V, on the same scale ________________ resistance to be added inseries to the circuit.(a) 6.66 kΩ (b) 16.66 k Ω (c) 12.5 k Ω (d) 24.66 k Ω 2)An electrical equipment in an office takes a current of 20 A from a 230V supply. The equipment isused for 30 hours per week. 1 kWh energy costs 15 Baiza. The cost per week of electricity is________________ Baiza.(a) 3070 (b) 970 (c) 1070 (d) 2070A copper conductor wire with a total length of 100ft is used in a 15 amp common household circuit has a resistance of 1.62 ohms/1000ft. If the circuit is fully loaded, determine the heat produced by the conductor? (Hint 1W = 3.413Btu/hr) a. 124.40 Btu/hr b. 99.83 Btu/hr c. 8.29 Btu/hr d. 177.50 Btu/hr