- If you know that the voltmeter reading in the circuit shown in the figure was 60 volts and that the reading of the ammeter was 90 microamps. So what is the resistance of R, given that the resistance of the voltmeter is 2x10 ^ 6 ohms.

Q: Look for equivalent resistance, ampere, voltage and power of each resistors. Voltage is 50 V

A: The resistors in the given network can be combined  When two resistors R1 and R2 are connected in…

Q: The power of a heater is 500 W at 800 °C. What will be the power at 200 °C? Temperature coefficient…

A: In this question we need to find a power at 200oC .

Q: Part A: What is the potential difference between points d and a in (Figure 1)? Part B: What is the…

A: Part (a) Observe the given circuit, mention the node voltage and redraw the circuit.

Q: he figure the current in resistance 6 is ig = 1.36 A and the resistances are R1 = R2 = R3 = 2.50 N,…

A: The solution can be achieved as follows.

Q: When you connect a voltmeter to read a dc voltage   a. polarity is not important b. connect the…

A: In this question,  We need to choose the correct options When you connect a voltmeter to read a dc…

Q: A 25mv, 2mA dArsonval movement is to be used in voltmeter whose full scale reading is 100v. The…

A: Given a voltmeter with, Meter current, Im = 2 mA The voltage across it, Vm = 25 mV So meter…

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

A: Given: Potential difference =2.15 V is applied across unknown resistance and current is also unknown…

Q: 18 R2 1K 5V D1 R1 1K Determine the current at LED, D2. (assume LED forward voltage is 2.1 volts) *

A:

Q: . A DC voltmeter has a sensitivity of 1000 Avoll When it measures half full scale in 100 V range,…

A: According to the question we have to find current through the voltmeter.

Q: Determine the voltage across R1 in the figure below, if the source is 10 volts, the Zener is 6.8…

A:

Q: In the figure the current in resistance 6 is i6 = 1.33 A and the resistances are R₁ = R₂ = R3 = 1.56…

A: According to the question, for the given circuitWe need to find emf of the battery.

Q: A 6v source is connected to 100 ohm resistor by two 12 ft lengths of 18 gauge copper wire. The total…

A:

Q: .0.52 O.1552 122Y. 0-256 l1ov. 'A 801

A:

Q: What is value of current if voltage is 10 V and resistancs is 10 ohm.

A: Given values are -

Q: How much is the eurrent, I, at each of the following points? a. Point A b. Point B c. Point C d.…

A: Since there is no other way...The current will flow through the given loop According to law of…

Q: A 12.1-mA current flows through a 10 percent, 2.7-k2 resistor. What range must the resistor voltage…

A: I = 12.1 m A  R = +- 10% of 2.7K ohm  Voltage range is required  From the ohm's law  V = I× R .

Q: Use Ohm's Law to calculate the equivalent resistance of R12, R23 and R123 (as specified in the lab…

A: Solution :-  Since you have asked multiple question and not specified which one to answer I will…

Q: A Multimeter is used to measure a) Only AC current b) Only DC voltage c) Both AC and DC quantities…

A: Given: A multimeter is used to measure _____.

Q: 6. The equivalent total resistance in the circuit in Figure 1 is 2200 E=7V- 4700 1000. 100. 3300…

A:

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: The current enters to the positive terminal of a device is i(t) = et amps, and the voltage across…

A: Given, Current, it=e-4t A Voltage, vt=3didt               vt=3ddte-4t=-12e-4t V Time, t = 0 to 2 sec

Q: A 0 – 150 voltmeter has a resistance of 2000-ohms per volt.  It is desired to change this voltmeter…

A:

Q: explain ohms law in terms of resistance

A: Describe the ohms law in terms of resistance?

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

A: Given circuit:-

Q: 10.0 2 10.0 2 a 5.002 20.0 2 5.00 2 25.0 V

A:

Q: Design a multirange d.c. milliammeter with a basic meter having a resistance 75 ohm and full scale…

A:

Q: What is the effect of decrease in voltage at constant resistance on a current according to ohms law

A: According to ohm's law the effect of decrease in voltage at constant resistance on a current .…

Q: R1 of 90 kilo ohm and R2 of 10 kilo ohm are in series across a 43-volt source. A) Draw the schematic…

A: we need to draw the schematic diagram and need to find the voltage drop at R2

Q: Voltmeter can measure DC current a. O b. only DC voltage Oc only AC voltage both DC and AC voltage…

A: 1) Given Vp = 20 V  Vavg = (20/π ) = 12.74 V  Hence the correct option is " a "

Q: If PMMC meter have internal resistance of 1002 and full-scale range of 1mA. Assume we wish to…

A: Here, Rm=10 Ohm Full Scale range of , Im=1mAIncreased range of, I=2Aso, We have to connect Rsh for…

Q: Two resistors of 100 kiloohms are connected in series and a supply of 200 volts DC is impressed…

A: When two resistors R1 & R2 are connected in series, their equivalent resistance is Req = R1 + R2…

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.