A 5 kW coil has a length of 45 cm. If a length 5 cm is cut from the coil, what power (in kW) is dissipated by the new coil? Notice that the voltage across the coil was held constant in this experiment.

A 5 kW coil has a length of 45 cm. If a length 5 cm is cut from the coil, what power (in kW) is dissipated by the new coil? Notice that the voltage across the coil was held constant in this experiment.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter13: Electromagnetic Induction

Section: Chapter Questions

Problem 67AP: A coil with 50 turns and area 10cm2 is oriented with its plane perpendicular to a 0.75-T magnetic...

See similar textbooks

Related questions

Q: The current in a coil drops from 3.5 A to 2.0 A in 0.50 s. If the average emf induced in the coil is…

Q: Show that if a coil rotates at an angular velocity ω , the period of its AC output is 2π/ω .

A: The AC graph can be demonstrated as,

Q: A voltage of 2.4 V is induced in a coil when a magnet is pushed inside it. if the number of turns of…

A: according to lenz law the emf induced in a coil is given by emf=−NΔΦ/Δt ΔΦ/Δt = rate of change in…

Q: nas ). The output voltage of the generator is 4.50 kV. (a) What is the line loss if a transformer is…

A: GivenResistance per unit length=4.3×10-4 ΩmPower Tansmitted, P=5 MW=5×106 WLength over which power…

Q: An emf of 9.7mV is induced in a coil while the current in a nearby coil is decreasing at a rate of…

Q: Determine the maximum power delivered by the AC generator which consists of a coil having 6 turns of…

Q: Suppose that when you move a magnet through a 34.5-turn coil at a certain speed, a voltage of 81.8…

A: According to Faraday's second law Induced emf = rate of change of magnetic flux

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

Q: A motor has coils with a resistance of 26 and operates from a voltage of 237 V. When the motor is…

Q: In a stationary field coil of 500 turns calculate the induced voltage produced by the following flux…

Q: 9.The ratio of the number turns in the primary to the number of turns in the secondary is 1 is to…

Q: A 75-turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.25 T field,…

A: The given values are, N=75d=10.0 cmω=8.00 rad/sB=1.25 T

Q: What is the inductance of a coil in which the average emf induced is 21V when the current in the…

Q: Which of the following statements can describe the process of the law of induction? A. Increase in…

Q: A magnet is placed into a coil. The induced emf across the coil is 10 mV. What would the emf be if…

A: The expression for the induced emf in the coil is ε=NBAω Here N is number of turns, B is the…

Q: A wire 0.5 m long cuts through a 0.4 T field at a speed of 20 m/s. What is the induced EMF? If the…

Q: cting material with resistance 0.0100 Ω/m and radius a=40.0cm. The coil is attached to a C=10.00μFC…

A: Given:- circular coil with N1=5000 turns is made of a conducting material with resistance 0.0100 Ω/m…

Q: A coil has an Inductance of 50μH. What voltage is induced across the coil when the rate of change of…

A: Given, Inductance of coil, L = 50 μH rate of change of current, dIdt = 10000 As

Q: An induction motor absorbs an apparent power of 400 kVA at a power factor of 80 percent. Calculate…

A: Given, Apparent power absorbed by the induction motor =400 KVA. Power factor =80 percent. We have…

Q: An ideal transformer steps down a voltage of 240V to supply power to a lamp with a power rating 3V,…

Q: A coil of wire 8 cm in diameter has 50 turns and is placed in a B field of 1.8 T. If the B field is…

A: ε=N∆ϕ∆t=NA∆B∆t=Nπd2B1-B24∆t=Nπd2B1-B24∆t=503.148 cm1 m100 cm21.8 T-0.6 T40.002 s=151 V

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…

Q: When 9 A of AC current at 123 V flows in the primary coil of an ideal transformer, how many amps at…

Q: The current in a coil drops from 3.4 A to 2.4 A in 0.49 s. If the average emf induced in the coil is…

Q: A step down transformer produces produces a voltage of 6 volts across the sec- ondary coil when the…

A: voltage in primary, Vp = 120 V voltage in secondary, Vs = 6 V

Q: A 5 kW coil has a length of 45 cm. If a length 5 cm is cut from the coil, what power (in kW) is…

A: Given data: Original Length of coil (L0) = 45 cm Power (P) = 5 kW Length cut from the coil (x) = 5…

Q: According to Lenz's law the direction of an induced current in a coil of resistance R will: be…

A: Solution:- According to the lenz's law; The current induced in a circuit due to change in magnetic…

Q: A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage…

Q: A coil with 651 turns of wire and a cross sectional area of 0.00560 m2 is rotated about its diameter…

A: Angular velocity (w) = 2720 RPM W = 2720×2π/60 rad/s W = 284.69 rad/s

Q: A coil with a self-inductance of 6.0 H is connected to a dc battery through a switch. As šooh as the…

Q: When the current in one coil changes at a rate of 5.6 A/ s, an emf of 6.3 × 10−3 V is induced in a…

A: Mutual indutance is the magnetic flux through coil 2 due to current in coil 1.

Q: A transmission line that has a resistance per unit length of 5.40 x 104 Q /m is to be used to…

Q: What is the mutual inductance of two coils if an average electromotive force of 0.15 V was induced…

Q: If the current in an inductor is doubled, by what factor is the stored energy multiplied?

A: If the current in an inductor is doubled, by what factor is the stored energy multiplied?

Q: The speed of an AC Servo motor is changed by varying the voltage applied to ______ Group of answer…

A: Basically, an AC servo motor is a type of servomotor that uses AC electrical input to produce…

Q: If the peak value of a 60Hz generator is 160V, what is the instantaneous voltage after the loop has…

A: Given data The frequency of the generator is given as f = 60 Hz. The Peak value of the generator is…

Q: The voltage across the input terminals of a transformer is 240 v. The primary has 50 loops and the…

A: Primary voltage, Vp = 240 V Number of turns in primary, Np = 50 Number of loops in secondary, Ns =…

Q: A voltage of 0.35 V is induced across a coil when the current through it changes uniformly from 0.1…

Q: A transmission line that has a resistance per unit length of 4.30 x 104 n /m is to be used to…

Q: In electromagnetic induction, how does the brightness of the bulb with a lower coil differ from…

A: The self inductance of the coil is given by L =μ0μrN2AIwhere, A =Cross-section area of the coilN=…

Q: what will be the current in the secondary winding of a transformer if the turns ratio is 8:4 and the…

A: Given data: Turns ratio, NpNs=84=2 Current in the primary winding, Ip=1 A

Q: The self-induced emf in a loop opposes a. the net resistance in loop b. the inductance…

Q: The current in a coil decreases from 9.0 A to 5.5 A in 0.30 s. If the average emf induced in the…

A: Solution: given that current in a coil decreases from 9.0 A to 5.5 A in 0.30 s emf = 25 mV

Q: If the cost of electricity is 15 cents per kilowatt hour, what is the cost of the electricity used…

Q: What is the inductance of a coil in which the average emf induced is 20.0 mV when the current in…

A: E = 20mV 3.5 A to 7.7 A t = 0.33 sec L=?

Q: A 10 ohm resistance wire and a 0.5 H coil are connected in series between the ends of a generator…

A: SOlution: Given that R = 10 Ohm L = 0.5 H V = 100sin40t

Q: The law which indicates the direction of induced current in the coil due to relative motion between…

A: The Lenz's law is used to indicate the direction of current in the conductor.

Concept explainers

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.

Question

A 5 kW coil has a length of 45 cm. If
a length 5 cm is cut from the coil,
what power (in kW) is dissipated by
the new coil? Notice that the
voltage across the coil was held
constant in this experiment.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

The armature and field coils of a series-wound motor have a total resistance of 3.0 . When connected to a 120-V source and running at normal speed, the motor draws 4.0 A. (a) How large is tire back emf? (b) What current will the motor draw just after it is turned on? Can you suggest a way to avoid this large initial current?
In Faraday’s experiments, what would be the advantage of using coils with many turns?
What is the rate at which the current though a 0.30-H coil is changing if an emf of 0.12 V is induced across the coil?
Does the induced emf always act to decrease the magnetic flux through a circuit?
In the circuit sho in the accompanying figure, the rtd slides along the conducting rails at a constant VelOCity v. The velocity is in the same plane as the rails and directed at an angle 6 to them. A uniform magnetic field Bis directed out of the page. What is the emf induced in the r?
The bolt of lightning depicted in the figure passes 200 m from a 90 turn coil oriented as shown. If the current in the lightning bolt falls from 7.00x106 A to zero in 9.9 μs, (b) what is the average voltage induced in the coil?
If you are planning to make an idea charger (step down transformer) with an output of 5.0V when it is plugged to the power outlet of 120V, what will be the ratio of output to input turns of the coils?
If magnetic coils are powered by AC, why don’t their contacts open and close 120 times per second?
A 10 ohm resistance wire and a 0.5 H coil are connected in series between the ends of a generator with an electromotive force of E = 100sin40t. If the current intensity passing through the circuit at time t = 0 is "zero", what will be the current intensity at any time t?
A square coil of side 4 cm and 200 windings initially lies perpendicular to a magnetic field of 4.0T (?̂ //?⃗ ). The coil is rotated through an angle θ of 75 degrees in 0.2 seconds. Calculate the average emf induced in the coil while it is being rotated
A kVp meter reads 86 kVp, and the turns ratio ofthe high-voltage step-up transformer is 1200. Whatis the true voltage across the meter?
A step down transformer produces produces a voltage of 6 volts across the sec- ondary coil when the voltage across the primary coil is 120 V. If we now drove this circuit in the reverse direction, what voltage appears across the original primary coil when 120 V is applied to the original sec- ondary coil?