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(II) An electric power plant can produce electricity at a fixed power P, but the plant operator is free to choose the voltage V at which it is produced. This electricity is carried as an
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Chapter 25 Solutions
Physics for Scientists and Engineers with Modern Physics
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- When working with high-power electric circuits, it is advised that whenever possible, you work "one-handed” or “keep one hand in your pocket." Why is this a sensible suggestion?arrow_forwardRefer to Figure 10.17 and the discussion of lights dimming when a heavy appliance comes on. (a) Given the voltage source is 120 V, the wire resistance is 0.800 and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 15.0 A passes through the wires when the motor comes on? Assume negligible change in bulb resistance, (b) What power is consumed by the motor?arrow_forwardFast plzarrow_forward
- A stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 2000 W for ten hours each day (ii) Two Electric water heater of rating 2250W each for 6 hours each day (iii) Twelve electric tube lights of rating 20W each for 12 hours each day. Calculate the electricity bill of the stationery shop for the month of November 2020 if the cost per unit of electric energy is 20 Bz/ kWh. (i) Electrical Energy(in kWh) consumed by three Air conditioners of rating 2000 W for 10 h of each day= (ii) Electrical Energy(in kWh) cơnsumed by two Electric Heaters of rating 2250 W for 6 h of each day= (iii) Electrical Energy(in kWh) consumed by twelve Tube light of rating 20 W for 12 h of each day = (iv) Total energy(in kWh) consumed in the month November'2020 = (v) Electricity bill(in riyals) for the month of November'2020 =arrow_forwardA stationery shop use the following electric appliances: (1) Three Air Conditioner of rating 2200 W for ten hours each day (ii) Two Electric water heater of rating 1500W each for 6 hours each day (ii) Twelve electric tube lights of rating 25W each for 12 hours each day. Calculate the electricity bill of the stationery shop for one month (30 days) if the cost per unit of electric energy is 25 Bz/ kWh. (1) Electrical Energy(in kWh) consumed by three Air conditioners of rating 2200 W for 10 h of each day= (i) Electrical Energy(in kWh) consumed by two Electric Heaters of rating 1500 W for 6 h of each day= (ii) Electrical Energy(in kWh) consumed by twelve Tube light of rating 25 W for 12 h of each day = (iv) Total energy(in kWh) consumed in one month = (v) Electricity bill(in riyals) for one month =arrow_forwardQ3-) A 2000KW, 500 V variable speed motor is driven by a 2500 kW generator using a Ward Leonard control system. The total resistance of the motor and generator armature circuit is 10 mQ. The motor turns at a nominal speed of 300r/min when E. is 500 V. Calculate the efficiency of the system during Es= 400 V and E. =380 V. (Handwriting is accepted.) R Load Prime E E o mover Constant Variable speed speed 2/4arrow_forward
- (b) Consider a particular phone that has a battery rated at 2.500 mAh. The battery operates at a potential difference of 3.90 V. How much energy, in units of kilowatt-hours, is stored in a fully charged battery? 0.975-2 ✓kWh (c) If electricity costs $0.16 (or 16.0 cents) per kilowatt-hour, what is the value of the total amount of energy stored in this battery? Express your answer in cents (or 0.01 of a dollar). How can you relate the energy from part (b) to the cost per kilowatt-hour to find the total cost? (d) When the phone is idle (that is, turned on but not making calls or texts, using GPS, or running any power-hungry apps), it will operate continuously for 32.2 hours from a fully charged battery, until the battery runs out. How much average current does the phone draw while idle? Express your answer in milliamperes, MAarrow_forwardA stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 2100 W for ten hours each day (ii) Two Electric water heater of rating 1000W each for 6 hours each day (iii) Twelve electric tube lights of rating 35W each for 12 hours each day. Calculate the electricity bill of the stationery shop for the month of November 2020 if the cost per unit of electric energy is 25 Bz/ kWh. ) Electrical Energy(in kWh) consumed by three Air conditioners of rating 2100 W for 10 h of each day= (ii) Electrical Energy(in kWh) consumed by two Electric Heaters of rating 1000 W for 6 h of each day= (iii) Electrical Energy(in kWh) consumed by twelve Tube light of rating 35 W for 12 h of each day = (iv) Total energy(in kWh) consumed in the month November'2020 = (v) Electricity bill(in riyals) for the month of November'2020 =arrow_forwardA stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 2200 w for ten hours each day (ii) Two Electric water heater of rating 2000w each for 6 hours each day (i) Twelve electric tube lights of rating 30W each for 12 hours each day. Calculate the electricity bill of the stationery shop for one month (30 days) if the cost per unit of electric energy is 10 Bz/ kWh. ) Electrical Energy(in kWh) consumed by three Air conditioners of rating 2200 W for 10 h of each day= (i) Electrical Energy(in kWh) consumed by two Electric Heaters of rating 2000 W for 6 h of each day= (iii) Electrical Energy(in kWh) consumed by twelve Tube light of rating 30 W for 12 h of each day = (iv) Total energy(in kWh) consumed in one month = (V) Electricity bill(in riyals) for one month =arrow_forward
- (b) Two units of DC voltmeters, A and B are used to measure a voltage from a resistor R2 as in Figure Q4 (b). These instrument specifications are stated as below: Meter A: Sensitivity S = 3 kN/V, Internal Resistance Rm = 0.5 kN, Range = 15 V %3D Meter B: Sensitivity S = 15 kN/V, Internal Resistance Rm = 3 kN, Range = 20 V %3D Ri=5kQ 30 V RF 25k2 Figure Q4(b) Calculate: (i) Voltage across R2 without any instrument connected. (ii) Voltage across R2 using instrument A. (iii) Voltage across R2 using instrument B. (iv) Absolute error for each measurement.arrow_forwardA house use the following electric appliances: (i) Four Air Conditioner of rating 4000 W for ten hours each day (ii) Three Electric water heater of rating 4250W each for 4 hours each day (ii) Ten electric tube lights of rating 30W each for 12 hours each day. Calculate the electricity bill of the house for one month (30 days) if the cost per unit of electric energy is 10 Bz/ kWh. () Electrical Energy(in kWh) consumed by four Air conditioners of rating 4000 W for 10 h of each day= (i) Electrical Energy(in kWh) consumed by three Water Heaters of rating 4250 W for 4 h of each day = (ii) Electrical Energy(in kWh) consumed by ten Tube light of rating 30 W for 12 h of each day = (iv) Total energy(in kWh) consumed in one month = (v) Electricity bill(in riyals) for one month =arrow_forwardAt =0 the switch S is closed with the capacitor unchurged. If C- 40 uF, e- 50 V, and R=5.0 k2, how much energy is stored by the capacitor whenI = 2.0 mA?arrow_forward
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
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