5. A PMMC voltmeter with a resistance of 10 ohms gives has a coil of effective depth of 3 mm and a width of 2.5 cm, the coil has about 100 turns. The flux spread in the air gap is of 10mWb / m. The spring has a constant of 2 x 10^-6 ". Then calculate, i Deflection torque produced by the coil, when it is connected to 20V to measure. Li. Deflection made by the pointer, when the meter is to measure a voltage of 10V.

Q: A square bar of 1 cm dimension and 30 cm long formed into a ring leaving an air gap at both ends of…

A:

Q: he resistance of the copper field winding of a dc machine at 40 degree Celsius is 0.40 ohms. After…

A: GIVEN, R1=0.40ohm                                    t1=40∘C               α=0.00393 ( for cu field…

Q: Biot-Savart law expresses:

A: According to question:

Q: A mmf is supplied by a current of 1 A through 100 turns. The magnetic unit consists of a steel core…

A: Reluctance =length premeability×area And rotal reluctance is the sum of reluctance of air gap and…

Q: Calculate the energy stored in the air gap and the total force acting on the armature

A: The above figure shows the single excited electromagnetic system. In this system has one coil is…

Q: Scenario: Consider a magnetic circuit with a mean length of 0.6 m. A 4x102 turn coil is wound around…

A: Given a magnetic circuit made from silicon steel with a, Mean length, l = 0.6 m Number of turn, N =…

Q: A moving coil mili voltmeter has a resistance of 20 ohm and full scale deflection of 120 degrees is…

A: Givenresistance of voltmeter=20 Ωdeflection=120°potential difference=100 veffective…

Q: flux of 8 mWb links with a 1020 turns coil and the inductance of 3 H. The value of energy stored…

A:

Q: Problem 3 A and B are two coils close. A has 1200 turns, and B has 1000 turns. When a current of…

A: In this question we need to find a self inductance of coil A and mutual inductance of coil

Q: The magnetic flux linked with a single turn coil is given by the equation: o = 5t2 + 3t + 6. The %3D…

A: Given, Magnetic flux linked with a single turn coil, φ=5t2+3t+6 The induced emf in the coil in the…

Q: A PMMC voltmeter with a resistance of 10 ohms gives has a coil of effective depth of 3 mm and a…

A:

Q: The induced electromotive force of a loop is 3.5 V and if the current is changed from 12 A to 13.5 A…

A:

Q: A DC current I flows in a long solenoid with n coil-turns per unit length. The core is made of iron…

A: The solution can be achieved as follows.

Q: Two identical coils A and B having 1000 turns and wound on a common magnetic core. 60% of the flux…

A: Given:Number of turns in coil A=1000Number of turns in coil B=100060% of the flux is linked…

Q: A flat circular coil having 50 loops of wire on in has a diameter of 48 cm. What current must flow…

A: Given : A flat circular coil  No of loops , N = 50  Diameter of coil = 48 cm , Radius = 0.24 m Flux…

Q: 4. If the Core of an Electromagnet is made of Permalloy (check the Tables for Relative Permeability)…

A:

Q: Two identical coils A and having 500 turns lie side by side such that 50% of flux x  of 10-5 wb in…

A: Write the given values. ϕA=10-5 WbIA=5 ANA=500

Q: The applied MMF to a simple magnetic circuit is 350AT. It was found that the resulting magnetic…

A: Flux in core = flux density × area of core. But flux = mmf / reluctance. Substitute given values to…

Q: A resistance of the coil is 500 and the number of turns 200 turns, connecting in a row with a…

A:

Q: A flux of 50 mWb links with a 1600 turns coil, when a current of 2.4 A passes through the coil.…

A:

Q: The length of a magnetic circuit in a moving iron instrument is 300mm.The coil around the soft iron…

A:

Q: Example(6): A magnetic circuit containing an air gap is shown in Figure below. With the dimension as…

A: Given data, Ac=Ag=5 cm2=Area of core =Area of air gapg=gap=0.2 cmlc=20 cm=Length of coreN=100…

Q: Q3) a PMMC instrument with a 100 turn coil has magnetic flux density in its air gaps of b-0.2 T. The…

A: Given data, Number of turns N = 100, Magnetic flux density B = 0.2 T. Diameter d = 1 cm = 0.01 m.…

Q: A coil with a material which is having permittivity same as air having number of turns N=500.…

A: Given values are - N=500i=4ALengthL=2cm=2×10-2mAreaA=10cm2=10×10-4m2

Q: In a moving coil instrument, the coil has a length of 5 cm, a width of 4 cm and 100 turns. The…

A: Given, Length of coil, l= 5 cm Width of coil, w= 4 cm Number of turns, N= 100 Magnetic flux density,…

Q: E = 100 V 60 Hz t (sec) 60 - 100 V -18

A: This question is from the network as well as field theory. Under which we are going to study…

Q: Consider a magnetic core like that shown. The path length of the steal is 2 cm. The steal has a…

A:

Q: The B-flux is determined to be 52.35 mWb. If the material that surrounds this flux has a…

A:

Q: A 500-turn coil is wound on an iron core. When a 120-V-rms 60-Hz voltage is applied to the coil, the…

A: The solution is given below

Q: A coil with 2000 loops on its length has a diameter of 2cm. A current of 5A is sent through it which…

A:

Q: 8. At what velocity must a conductor 75 mm long cut a magnetic field of flux density 0.6 TIf an…

A:

Q: how does the electrostatic discharge occur in the following situation? explain with suitable…

A: Electrostatic discharge and the mathematical substantiation: a. Insulator surface is rubbing…

Q: A flux of 0.0016 Wb flows in a silicon sheet steel coil/core. The arrangement appears as shown below…

A:

Q: A freight elevator weighing 5000kg is to be lifted 20 meters in 3 minutes.  Calculate the horsepower…

A: The solution is provided in following steps.

Q: An air-cored choke is designed to have an inductance of 20H when operating at a flux density of I…

A: We have been given an air-cored choke having,   Inductance (L) = 20 H Flux density = 1 Wb/m2…

Q: Plot the direction of flux at the main poles. b. Draw the current direction at the main poles. c.…

A: Note: As per our policy, I have attempted the first three subquestions. (a) The direction of flux in…

Q: solenoid similar to the figure below, has a core made of cast steel (refer to the figure on the next…

A:

Q: Identify the unit of flux density a. (m x m)/amp b. m x m c. Wb/(m x m) d. Wb

A: In this question we need to answer what is a unit of flux density.

Q: A toroidal core with a mean circumference of 100 cm and a cross sectional area of 10 cm2 is wound…

A:

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.