0. A 60 W bulb is on for 10 h. a. What is the energy used in wattseconds? b. What is the energy dissipated in joules?

Q: QUESTION 20 A 9.0-V battery is hooked to a 3.0 ohm resistor. What current is flowing through the…

A: Note: We are authorized to answer the first question since the exact one wasn’t specified. Please…

Q: 1. Discuss your observations on both series and parallel circuit. (Brightness of light bulb)

A: As per the policy, I can answer only one question at a time. There are two ways of the connections…

Q: If we use 5000 µF, we can get a very low ripple voltage. But this is so bad and this a disadvantage,…

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Q: What is Ohm’s Law, and why is voltage so important.

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Q: The saw-tooth voltage waveform shown in the figure is fed to a moving iron A. meter. Its reading…

A: Given waveform is - Given meter is moving iron meter.

Q: Show that the average power absorbed by each resistor is P2Ω.=P4Ω.=7.20W.

A: In this question, we need to determine the average power absorbed by each resistance as shown the…

Q: A 25 watts, 120V has a cold resistance of 45 ohm. When the voltage is switched on, what is the…

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Q: Two 115-V incandescent lamps A & Bare connected in series across 230-V de source. Lamp A is rated…

A: This problem is related to circuit theory. This is based upon the concept of incandescent bulbs…

Q: 2. Explain the difference of power and energy.

A: IMPORTANCE OF OHMS LAW:   Ohm’s law is vitally necessary to describing electrical circuits as a…

Q: The meter constant of a single phase 230 V induction watt hour meter is 400 rev/kWh. The speed of…

A: Given, a induction watt hour meter having Voltage, V= 230 V Current, I= 10 A Meter constant, K= 400…

Q: 7. A 100 W incandescent lamp has a resistance when cold (lamp extinguished) that is only 1/12 of its…

A: Given: Power, 100 W Voltage, 120 V To find: a) Lamp current b) Cold resistance c) Instantaneous…

Q: Problema 6 In the figure, the current Ibat in the battery is equal to A. 1/2 B. 21₁/3 C. I₁ D. 31/2…

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Q: Solar energy has very little negative impact to a. water use O b. chemical pollution O c. all of…

A: In this question , we will see solar energy effect..

Q: Convert 3000 W into the equivalent Btu/hour. Show all the steps.

A: The relation between watts (W) and Btu/hour can be expressed as 1 W=3.4121 Btu/hour

Q: what is the main parts of Energy meter

A: There are four essential parts of an energy meter.

Q: In the "current" war the winners were  a) Edison and wstinghouse b) Edison and tesla c)…

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Q: a generating station has an overall efficiency of 15% and 0.75% kg of coal is burnt per kwh by the…

A: Given data Overall efficiency = 15% Coal required to produce the 1kwh energy = 0.75 kg

Q: Question: A battery is charged from a constant dc source of 220 V through a chopper. The dc battery…

A: First find the output voltage in each case and using input output voltage relation calculate duty…

Q: Overall efficiency of a thermal plant is

A: The explanation is as follows.

Q: The number of revolutions per kw for a  230v, 10A watt- hour meter is 900. On test at half load, the…

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Q: The amount of current the battery can produce for a period of 20 hours at 80 degrees Fahrenheit is…

A: An ampere-hour (abbreviated Ah, or sometimes amp hour) is the amount of energy charge in a battery…

Q: The resistance R and a 2 μF capacitor are connected in series          across 200-V dc supply.…

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Q: Please show how to determine the power dissipated by the 200 ohm resistor if P = .08 W.

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Q: T To what voltage the machine will excite when the ficld resistance is 55 0 and the spced 800 rp.m.…

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Q: Find the value of the currents 11 and 12 12 100 ohm 10V 10V 100 ohm -0.3 and -0.1

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Q: In the figure R₁-3.41R, the ammeter resistance is zero, and the battery is ideal. What multiple of…

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Q: One single page energy meter operating on 230 Volt and 5 ampere for 5 hours makes 1940 revolutions.…

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Q: A moving iron voltmeter reads 250v when connected to 250v dc if connected to 250v 50 Hz .the…

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Q: 24/ Determine the unit of energy if the power is measure in mega watts and the time in minutes. a.…

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Q: 60 V 10 N 20 N 16 N

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Q: If an energy meter makes 5 revolutions in 100 seconds, when a load of 225 W is connected, the meter…

A: Given an energy meter having, Number of revolution = 5. In time, t = 100 seconds = 1003600 hours.…

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.