A cell has a terminal voltage that changes from 1.5 volts to 1.4 volts when a 10 ohm load is connected. what is its internal resistance

Q: There are three 15,000-ohm resistors connected in series across a 120-volt DC source.  What is the…

A: The solution can be achieved as follows.

Q: Six dry cells having emfs of 12.10, 12.22, 12.30, 12.40, 12.35, 12.60, 12.25 Volts and resistances…

A: Given: The EMFs are: E1=12.10 VE2=12.22 VE3=12.30 VE4=12.40 VE5=12.35 VE6=12.60 VE7=12.25 V The…

Q: 13-volt battery is connected to a series circuit in which the inductance is 1-henry and the…

A:

Q: A voltmeter and a resistance of 200 Ω are connected in parallel across a 140 V battery. The…

A: Given Data: Voltmeter range = 0-100 Resistance value = 200 ohm battery voltage = 140 V sensitivity =…

Q: A string of 30 mini LED lights, each using a 60 ohm resistor, are connected in parallel to a 3V…

A: To solve above question one should know why resistance are connected in series with LEDs LEDs are…

Q: Two resistors 10 kilo-ohms and 90 kilo-ohms are connected in series across 3 Volts source. What is…

A:

Q: A 50-mv meter has a resistance of 5 ohms. A multiplier has been inserted to produce a voltmeter of…

A:

Q: 14. A DC ammeter set at 2 mA range is connected in series with the lamp. What is the current…

A: Fig: Given circuit

Q: ou are an electrician on the job. You have been given a multimeter that has the following AC voltage…

A: The meter full scale voltage is given by  …… (a)

Q: Draw diagrams to show how to connect a Digital Multimeter (DMM) for the following situations: (1) to…

A:

Q: What is the equivalent of 1 Farad into ratio?   Select one: a. 1 Volt per Joule  b. 1 Volt per…

A: given here a capacitance value of 1 farad and asked what is the equivalent of 1 farad into ratio.

Q: 7.a. Which of the following tests must be performed on a de-energized circuit? A. Power test…

A:

Q: A string of 30 mini LED lights, each using a 60 ohm resistor, are connected in parallel to a 3V…

A: If n resistors of resistance (R) is connected in parallel then equivalent resistance(Req) is Rn.…

Q: While measuring resistance by the voltmeter – ammeter method, the maximum possible percentage error…

A: Maximum percentage error in the resistance?  If percentage error in voltmeter =1.8% Percentage error…

Q: In using Kirchhoff’s rules, you generally assign a separate unknown current to ......    A) each…

A: Explanation is as follows.

Q: A DC electrical circuit with a 24-volt power supply has two resistors in series of 150 ohms and 430…

A: Let us find the voltage drop across the 430 ohm resistor using ohm's law and finding the current in…

Q: A 18-volt battery is connected to a series circuit in which the inductance is 1-henry and the…

A: To solve above question, one should understand the behavior of Inductor and capacitor in DC circuit.…

Q: A 17-volt battery is connected to a series circuit in which the inductance is 1-henry and the…

A:

Q: What is the Voltage between Outer Wires of the Three wire D.C distribution system. O a. three times…

A:

Q: Draw a set of 1.5-volt cells in a series circuit so that the total battery voltage is 9 volts. a)…

A: A set of 1.5 Volt cells in a series circuit, so that the total battery voltage is 9 volts.

Q: Two lamps need 50V and 2.0 A each in order to operate at a desired brilliancy. They are to be…

A:

Q: Six dry cells having emfs of 6.10, 6.22, 6.30, 6.40, 6.35, 6.60, 6.25 Volts and resistances of 0.25,…

A:

Q: What is the voltage when current is 5 A and resistance is 88 ? Do NOT include units Round your…

A: for determine voltage  we use ohm's law it is given as when pressure and temprature is constant then…

Q: The hot resistance of an incandescent lamp is 10 ohms and the rated voltage is 50 V. Find the series…

A: The obstruction offered to the path of current is called resistance. The electrical element that…

Q: If a difference of 2.15 volts is applied to an unknown resistance and the measured current is in…

A: The potential difference between two points is given by the difference of voltage at the two points.

Q: type of resistance device that can be placed in a DC motor circuit and varied to limit the speed of…

A: A variable resistor is placed i  dc circuit motor to vary and limit the speed of dc motor. This is…

Q: sketch a diagram showing the ohmeter face for a reading of 1.2 k resistance indicate the setting of…

A: The use of an ohmmeter is to measure the resistance between its leads. This resistance between its…

Q: Three 120-ohm resistors are to be connected in four possible ways. Calculate the equivalent…

A:

Q: Resistances can be measured with the help of a  _____________   ohmmeter ammeter wattmeter…

A: DEVICE                         QUANTITY   ohmmeter                     RESISTANCE ammeter…

Q: type of resistance device that can be placed in a DC motor circuit and varied to limit the speed of…

A:

Q: A 14-volt battery is connected to a series circuit in which the inductance is 1-henry and the…

A: Given Vb = 14 V, R = 4 ohm, L = 1H, Is = 1.4 Amp To find current at t = 5 second

Q: a group of incandescent lamps draws 7.4 A, from a 120v supply. due to a small resistance in the wire…

A: A group of incandescent lamps draws 7.4 A, from a 120v supply. Due to a small resistance in the wire…

Q: Q: copper wire (a=0.0068 ) is connected to a 12 volt battery at 20 °C and contact current of 0.45A.…

A: At temperature T=20° C the current is 0.45 A and at new temperature it is decreased to 0.41 A. Since…

Q: The convention for voltmeters is to use a black wire for the negative reference terminal and a red…

A: Part 1 The electromotive force EMF is the potential difference between two points. The potential…

Q: Support the finding that the neutral wire is 0-volts

A: Neutral wire: It is either white or green wire that takes unused electricity back to the panel. It…

Q: A 10-ohm and 20-ohm resistance are connected in parallel. Another resistance of 5-ohm is connected…

A:

Q: The ammeter-voltmeter method is used to measure the resistance. With the voltmeter connected across…

A: In the question, Find the true value of the resistance? If reading of ammeter I= 0.8A Reading of…

Q: current supplied by a 50V voltage source is controlled by a variable resistor. The original setting…

A: In this question we will find resistor setting if current setting changes...

Q: 0 -150 volt DC voltmeter has a resistance of 100 ohms per volt. What is the power dissipation of…

A:

Q: Five dry cells having emfs of 2.30, 2.40, 2.35, 2.60, 2.25 Volts and resistances of 0.40, 0.20,…

A: The equivalent emf of the cells will be,  E=E1+E2+E3+E4+E5E1=2.30 VE2=2.40 VE3=2.35 VE4=2.60…

Q: voltmeter and a resistance of 200 Ω are connected in parallel across a 140 V battery. The…

A: In this question we will fund power dissipation in voltmeter and resistance....

Q: A consumer has a work area that he wishes to illuminate with single 80W, 220V tungsten fitting. The…

A: The rating of tungsten fitting is 80 W, 220 V. P=80 W , V=220V Let current drawn by one tungsten…

Q: 15. An AC ammeter set at 10 A is connected in series with the lamp which is busted/open. What is the…

A: The electrical instruments are used for measurement purposes of various parameters. The various…

Q: The circuit below(left) displays a schematic diagram of a battery. The voltage measured by U1 is…

A: Since voltage at the terminal of battery resistor combination is 1.5 Now in circuit on right has two…

Q: 1. In Solar PV modules, energy is converted to energy. 2. Choose the type of output voltage of a…

A: Photovoltaic modules consists of number of photovoltaic cells connected in series or parallel to…

Q: What is the current flow through an ohmmeter when it indicates zero resistance? A. MAXIMUM  B.…

A: The explanation is as follows.

Q: A 17-volt battery is connected to a series circuit in which the inductance is 1-henry and the…

A: To solve above question, one should understand the behavior of Inductor and capacitor in DC circuit.…

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.