A motor in normal operation carries a direct current of 0.750 A when connected to a 120 V power supply. The resistance in the motor windings is 17.2 . Determine the following values. (a) While in normal operation, what is the back emf generated by the motor? (b) While in normal operation, at what rate is internal energy produced in the windings? (c) What If? Suppose that a malfunction stops the motor shaft from rotating. At what rate will internal energy be produced in the windings in this case in kW (Most motors have a thermal switch that will turn off the motor to prevent overheating when this occurs.)

Q: How many coils must a loop have with a cross-sectional area of 0.50m? that is pulled through a…

A: E =4V, A = 0.5m2 B = 0.25T, ∆t  = 1sec  The induced emf in the coil is  E = N.BA/∆t N = ∆t.E /BA N =…

Q: At what velocity must a conductor 75 mm long cut a magnetic field of flux density 0.6T if an emf of…

A: Given data: Length of conductor (L) = 75 mm = 0.075 m Magnetic field (B) = 0.6 T Induced emf (ε) = 9…

Q: What is the EMF induced in a loop conductor if the loop consists of 20 turns, the area of the loop…

A: Write the expression for change in magnetic flux passing through the coil when the area of…

Q: Design a current loop that, when rotated in a uniform magnetic field of strength 0.10 T, will…

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Q: Find the strength of the magnetic field in a conductor 0.5m long moving with a velocity of 10m/s,…

A: Given data: The length of the conductor, l=0.5 m. The velocity of the conductor, v=10 m/s. The…

Q: If 71.4 cm of copper wire (diameter = 0.860 mm, resistivity 1.69 x 10 S-m) is formed into a circular…

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Q: Consider an airplane below. When it is moving with a speed of 225 m/s, how much the emf induced…

A: Given: The speed of the plane is 225 m/s. The distance between wings is 60 m. The strength of the…

Q: A flat, square, 75-turn coil of wire is rotated from having its plane perpendicular to an external,…

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Q: The figure shows a copper rod moving at a velocity of 4.5 m/s parallel to a long straight wire…

A: Induced emf is defined as the rate of change of magnetic flux. Magnetic flux is defined as the dot…

Q: A conducting rod of length ℓ moves on two horizontal, frictionless rails as shown inFigure P31.26.…

A: In the system drawn in the question, if we apply some force on the rod then there will be a current…

Q: Below is a Motional EMF problem with a sliding, conducting bar connecting a wire loop within a…

A: Given:- The velocity of the bar V = 25.0 m/s  The magnetic field B = 0.640 T  The resistance in the…

Q: A 120.0-V motor draws a current of 9.65 A when running at normal speed. The resistance of the…

A: Given data: The voltage =120.0 The resistance =9.65 A The resistance =0.752 Ω

Q: A V = 30 mV battery is connected to a single turn loop of dimensions a = 13 cm by b = 12.5 cm has a…

A: The given values are, V=30 mV=0.030 VA=a×b=13 cm×12.5 cm=13×10-2 m×12.5×10-2 m=162.5×10-4 m2R=15.5…

Q: The magnetic flux through a coil of wire containing two loops changes at a constant rate from –58 Wb…

A: According to faraday's law of Electromagnetic induction, whenever flux passing through a coil…

Q: motor has coils with a resistance of 42.0 Ω and operates from a voltage of 240 V. When the motor is…

A: The back emf is represented as a variable emf that opposes the one driving the motor. Back emf is…

Q: .A 110 V direct current motor generates a back-emf of 98 V when it runs at full speed. If the…

A: Given Data: Applied voltage, V=110 V Back-emf, ε=98 V Resistance, R=10 Ω ⇒Motor runs at full speed.

Q: A 120-V, series-wound motor has a field resistance of 80 Ω and an armature resistance of 10 Ω . When…

A: Given Data: The supplied emf is, ε=120 V The field resistance is, Rf=80 Ω The armature resistance…

Q: The bolt of lightning depicted in the figure passes 200 m from a 90 turn coil oriented as shown. If…

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Q: You are designing a generator to have a maximum emf of 8.0 V. If the generator coil has 200 turns…

A: Given : Maximum emf V = 8.0 V             Number of turns N = 200 turns             Cross sectional…

Q: When the current through an inductor is decreasing at a constant rate of 0.5A/s, the magnitude of…

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Q: A square coil of wire of side 2.55 cm is placed in a uniform magnetic field of magnitude 1.75 T…

A:

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 induced emf in a single loop of wire has a magnitude of 1.35 V when the magnetic flux ischanged…

A: induced e m f, e = 1.35 V magnetic flux changed from 0.99 T m2 to 0.26 T m2

Q: A square wire loop of 19 cm side and resistance 12 is in the middle of a magnetic field with outward…

A: Given: The length of the squre loop is 19 cm = 0.19 m. The resistance of the loop is 12 Ohm. The…

Q: In one of NASA's space tether experiments, a 20.0 km-long conducting wire was deployed by the space…

A: The length of the conducting wire is, 20 km =20,000 m The velocity is 7.86 ✕ 103 m/s The…

Q: The magnetic field in the region between the poles of an electromagnet is uniform at any time, but…

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Q: A wind turbine generator contains a circular coil that is rotated fully through a 100-turn cycle. If…

A: The expression for the required radius is,

Q: You are designing a generator to have a maximum emf of 8.0 V. If the generator coil has 200 turns…

A: Given, Number of turns,N=200 Cross-sectional area,A=0.03 m2 Magnetic field,B=0.03 T Maximum…

Q: After being closed for a long time, the switch S in the circuit shown in the figure below is thrown…

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Q: A coil with an inductance of 2.6 H and a resistance of 8.2 Ω is suddenly connected to an ideal…

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Q: A 227-turn circular coil of radius 24 cm is perpendicular to a uniform magnetic field of 0.55 T.…

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Q: Mass m = 1.75 kg is suspended vertically at rest by an insulating string connected to a circuit…

A: Here we have to use some basic formula.

Q: Two rods of equal lengths (1.40 m) are moving as shown in the figure. The speed v1 = 2.00 m/s and…

A: GivenLength of the rods L = 1.40 mSpeed of the rodsv1 = 2.00 m/sV2 = 1.10 m/sMagnetic field B = 0.45…

Q: A square coil of wire of side 3.75 cm is placed in a uniform magnetic field of magnitude 1.75 T…

A:

Q: Consider a 300-turn coil with a surface area of a cm?. The length of the coil is 15,0 cm. The…

A: The self-inductance of the coil is

Q: A coil has an area of 100 cm? with 224 turns connected across a 5.00 Q resistor to form a closed…

A:

Q: The rod shown below moves to the right on essentially zero-resistance rails at a speed of v = 2.9…

A: For finding the current:

Q: A solenoid ring with N = 3 loops is immersed in a uniform time-varying magnetic field (shown in the…

A:

Q: 1.0 How many turns should a coil with a diameter of 50 mm needs to generate 24 v of electricity when…

A: The magnetic field due to a circular coil carrying current is given by:B=μ0nI2rwheren is number of…

Q: A wire loop that encloses an area of 15 cm? is perpendicular to a magnetic field of 0.10 T. If the…

A: given data area = 15cm2 magnetic field = 0.10 T field is drops to 0.04 T in 0.2 s average emf…

Q: A square coil of wire of side 3.40 cm is placed in a uniform magnetic field of magnitude 2.00 T…

A:

Q: A square coil of wire of side 3.55 cm is placed in a uniform magnetic field of magnitude 1.50 T…

A: (a)In the initial orientation of the coil, the magnetic flux passing through the loop is,After loop…