A room 20 ft. by 30 ft. is illuminated by five 200 watt, 3700 lumen incandescent lamps. The average illumination intensity at the working plane as measured by a footcandle meter is 10 lumen per sq. ft.. Calculate the utilization factor of the lamps. a. 0.23 b. 0.56 c. 0.45 d. 0.23

Q: Answers: a) -90°,81 rad/s, -180° b) 0°,81 rad/s, -180° c) -90°,9 rad/s, -180° d) 0°,9 rad/s, -180°…

A: Answer: d)00,9 rad/sec,-1800 Explanation: a) it is not a valid option. The lowest frequency phase is…

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A: In this circuit, we assume for DC analysis for this capacitor is open circuited and the Rf1 and Rf2…

Q: 7-19 In Fig. 7-24, solve for 1₁, 12, and/3. Figure 7-24 R₁ = 10 92 R₂ = 152 1₁=9A www R₂ = 12 92

A: Given data,

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Q: a) Let V = 100r²,r < 10m. Find w, and D. Derive the electric field intensity (E) for line charge.

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Q: 6. A load absorbs maximum power from the circuit shown below. Calculate the load impedance and the…

A: The given circuit  Supply current will

Q: ZT- 20 j20 20 -j40 40 j6 2 O a. Z = 1,38 +j1,08 O b. Z = 3,38 +j1,08 O c. Nenhuma das alternativas…

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Q: If the inputs A and B are 0 and 1 respectively, Q5 will: (i) cause the LED to turn off (ii) a…

A: The given circuit diagram is shown below,

Q: A light bulb is rated for 60 W, 240 V. Find the resistance of the bulb. Ο 960 Ω Ο 1000 Ω O 8600 O4Q

A: Given: Power rating of bulb, P = 60 W Voltage, V = 240 V

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A: Given a capacitor is made of a solid metal sphere having, Inner radius, a = 2 cm Outer radius, b = 6…

Q: Given the boolean function below: F(A,B,C,D) = m(1,3,8,11,12,14) + Ed(0,2,6,9,10,13,15) Find the…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: R₁ 5.0 Ω a R₂ 78 Ω U Τ Εξ Εξ 0.1002 Τη ww 0.50 Ω 1005 Ω h R₂ Μ 40 Ω R₂ - 20 Ω e *0.20 Ω ΣΑ

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Q: Q2) and determine if it is generated or consumed Using Mesh analysis to find the Power of the 8A…

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Q: 1. For the circuits (a) through (d) in the figure below (Figure 1). Assume a = 50, and Varl = 0.7…

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Q: How many numbers

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Q: The floor area of a room is 10 m x 10 m. The desired illumination level is 150 lux. Assume the…

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Q: 3. A 60 AH nickel-cadmium battery has been fully recharged. How long could it supply a continuous…

A: Given, A nickel-cadmium battery has Charge capacity Q=60 Ah Current I=5 A

Q: 4) b) The circuit of figure given below shows a capacitor, two ideal batteries, two resistors, and a…

A: It is given that: C=10 μFε1=1 Vε2=2.2 VR1=0.2 ΩR2=0.4 Ω

Q: 9. Find the equivalent capacitance of the following system. (C₁ = 1 µF, C₁=3 μF, C₁=2.7 μF, C₁ = 9.3…

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Q: .R4 320 V1 tr 120V R2 ww 40 R5 -100 Hi R1 20 R3 42 R6 22 V2 -110V

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Q: 1. Determine i in the circuit below. ~10 cos(1 -120°) V 1Ω 916 F 2 Ω www 24 V 2 cos 31 www 4Ω ell 2Η

A: Given:

Q: Solve I1, I2, I3 and 14

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Q: Maximum flux density in the core of 225 V/3000 V, 50 Hz single-phase transformer is 1.3 Wb/m². If…

A: Given: A 225 V/3000 V, 50 Hz single phase transformer has, Maximum flux density = 1.3 Wbm2 EMF per…

Q: VBB 5 V RB www 12 ΚΩ Rc 120 Ω Ig Vcc 12 V

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Q: answer number 6.pls

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Q: A 50 Ω resistor and a capacitor of 100 μF are connected in series to give a 220 v, 50 Hz supply. So…

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Q: Q2- A- Find the static steady-state error shown by the system of open-loop transfer function…

A: The steady state can be calculated by using the general error signal representation and by using the…

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Q: The 2G GSM technology uses a carrier separation of a. 1.25 MHz b. 200 KHz c. 30 KHz d. 300 KHz

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A: The analysis of the above circuit does no require Kirchoff's method to determine the parameters of…

Q: A circular loop of radius 0.0400 m is oriented 35.0 degrees to a 0.152 T magnetic field. What is the…

A: Given data, Radius of circle r=0.04 m Angle θ=350 Magnetic field B=0.152 T

Q: What will be the meters reading? Voltmeter V, 24 V XMM1 Xid www R₁ = 1.5k2 R₂ = 2.5k2 XMM2 Ammeter

A: Given circuit,

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A: Given circuit, U=24 VR1=3.9 kΩR2=6.8 kΩR3=6.8 kΩ

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Q: The modified work function of an n-channel MOSFET is -0.85 V. If the interface charge is 3 × 104…

A: Given: Modified work function, Wc=-0.85 V Interface charge, q=3×10-4 C/m2 Oxide capacitance, C=300…

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Q: B. For a signal of i(t) = 13- sin(2t) A, determine, and find the 1. average value 2. RMS value

A: Given: A signal of it=13-sin2t A

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A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: 2. If the voltage gain of an amplifier is 100, the voltage gain in dB is equal to a. 6 dB b. 40 dB…

A: Given data, Voltage gain of an amplifier, Av=100 V

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Q: The impedances, Z₁ = 6 + j8, z₂ = 8 − j6, and Z3 = 10 + j0 ohms are measured at 60Hz, form three…

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Q: QUESTION 7 Give the decimal equivalent of the binary number 101.101

A: Given, The binary number is 101.1012

Q: EXAMPLE 4.15 Given the network of Fig. 4.43 and the BJT characteristics of Fig. 4.44. a. Draw the…

A: The required parameters can be calculated by using the DC analysis of the amplifier circuit.

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A: Input power Pi = 25 W Output power Po  = 20 W Efficiency = ? Power loss = ?

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A: Given: The armature of a dc generator has a two-layer simplex lap winding. Total armature slots = 72…

Q: Fill in the truth table for the following circuit:

A:

Properties of Radar

Radar stands for radio detection and ranging. It is a type of system which detects the distance, velocity, and angle of objects. This system can also detect weather formations, spacecraft, aircraft, missiles, terrain, etc.