The maximum induced emf in a generator rotating at 210 rpm is 45 V. How fast must the rotor of the generator rotate if it is to generate a maximum induced emf of 56 V?

Q: A generator produces 21.0 V when turning at 870 rev/min. What emf does it produce when turning at…

A: emf induced = 21 V when the coild turns at 870 rev/min New angular speed = 510 rev/min Let the…

Q: A generator produces 18.0 V when turning at 910 rev/min. What emf does it produce when turning at…

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Q: A coil with loops of area 0.0120 m^2 rotates at 60.0 Hz through a B field of 0. 125 T. How many…

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Q: A step-down transformer has a turns ratio of 1:10, and its primary is connected across the terminals…

A: If a voltage 'V' is applied across a resistance 'R', then the power dissipation in that resistor is:…

Q: In a coil with an inductance of 5 mi, the current changes in 0.1 ms by 0.2 A. How much…

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Q: Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted…

A: The equation for the current in terms of power and voltage is,

Q: A 60 V emf is produced in a 12 H inductor. Calculate the rate at which the current is changing in…

A: Given data The emf of an inductor is ε = 60 V. The Inductance of the inductor is L = 12 H. From the…

Q: What is the inductance of a coil if the coil produces an emf of 2.86 V when the current in it…

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Q: Problem 8: Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once…

A: Part (a)Find the relation between current, power and voltage.

Q: How much of a change in current over time would produce a self-induced EMF of 6.00V in a  10µH…

A: self induced emf produced, ε=6.00 V Inductance in an inductor, L=10 μH=10×10-6 H=10-5H self…

Q: Suppose a generator has a peak voltage of 302 V, and its coil with 500 turns and a diameter of 5.48…

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Q: A transformer is to be designed to increase the 30-kV (rms) output of a generator to the…

A: Input voltage, V1 = 30 kVOutput voltage, V2 = 345 kVNumber of turns in primary coil, N1 = 80 Number…

Q: The current in a coil changes from 3.60 A to 1.90 A in the same direction in 0.510 s. If the average…

A: Given data :                   Current ,                               I1 = 3.60AI2 = 1.90A…

Q: A step-down transformer has 63 turns in its primary coil and 20 turns in its secondary coil. The…

A: Given: Number of turns in the primary coil, Np=63 Number of turns in the  secondary coil, Ns=20…

Q: The current in a coil drops from 3.8 A to 1.8 A in 0.51 s. If the average emf induced in the coil is…

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Q: The generator of a car idling at 1200 rpm produces 14.2 V. What will the output be at a rotation…

A: Given data:- The speed of the generator is N1=1200 rpm The another speed of the generator is N2=2800…

Q: An emf of 121.5 mV is induced in the windings of a coil when the current in a nearby coil is…

A: The formula for the induced emf in term of mutual inductance is:

Q: Problem 9: Suppose a generator has a peak voltage of 285 V and its 500 turn, 5.5 cm diameter coil…

A: Given that----- E = 285 V diameter = 5.5 cm B = 0.225 T Question ? What frequency in rpm must…

Q: A generator produces 18.0 V when turning at 910 rev/min. What emf does it produce when turning at…

A: Emf produced by the generator is 10.68V Explanation:Given data:-solution:-

Q: What is the emf in the entire coil at t=2.4 s? For the purposes of entering a sign, let the positive…

A: Consider given data as below. Number of turns, N=7000 turns Resistance, R=6.3 Ω A current,…

Q: If the current in an inductor changes by a factor of 3.6, by what factor does the the energy in the…

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Q: Measurements on a solenoid coil (inductor) at a particular instant in time indicate that the current…

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Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.