A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90˚, so that the normal becomes perpendicular to the magnetic field. The coil has an area of 1.5 × 10-3 m2, 50 turns, and a resistance of 150 Ω. During the time while it is rotating, a charge of 6.0 × 10-5 C flows in the coil. What is the magnitude of the magnetic field?

Q: A 0.836 kg toy car is powered by four AA batteries (6.00 V total) connected directly to a small DC…

A: Recall P=iεSo E= energy supplied by battery=Pt=iεtNow energy converted to KE=EηWhere η is efficiency

Q: In the circuit of the figure & = 3.20 kV, C = 7.80 µF, R1 = R2 = R3 = 1.03 MQ. With Ccompletely…

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Q: You connect a battery, resistor, and capacitor as in (Figure 1), where R = 14.0 Ω and C = 3.00…

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Q: Consider a long, horizontal Large Wire with current of 10A flowing through it. We want to levitate a…

A: A) As we know that the direction of magnetic field above a current carrying wire in which current…

Q: A copper wire with a square cross-section (side length 5.00 µm) is next to an iron wire with a…

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Q: When the switch S is toggled to the left, the capacitor C charges through the resistor R. When the…

A: Resistor used for charging VC=ε1-e-tRCR=-tCln1-VCε=-1.30 s8.50 μFln1-755 V1260 V1 μF10-6 F=1.67×105…

Q: The switch in the given figure has been in position A for a long time. Assume the switch moves…

A: When the switch is in position A , the capacitor charges. After charging for a long time, the…

Q: Chapter 30, Problem 054 In the figure, ε = 118 V, R₁ = 14.9 №, R₂ = 21.3 N, R3 = 35.8 №, and L= 1.90…

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Q: A copper wire with a square cross-section (side length 5.00 µm) is next to an iron wire with a…

A: Voltage is produced perpendicular to current and field. This voltage is hall voltage. The effect…

Q: In a new lab experiment, two parallel vertical metal rods are separated by L= 0.60 m. A R = 2.0Ω…

A: Given: Length L=0.60m Resistor R=2Ω Mass m=0.20kg Magnetic field B=0.50×10-4T

Q: A C, A QUESTION 30 In the figure, R=10.0 k2; R₂ = 15.0 k2;C= 0.400 μF; e = 20.0 V. First, the switch…

A: Given:- R1 = 10 kΩ and R2= 15 kΩ C = 0.40μF ε=20 V The circuit as  First, the switch is closed for…

Q: A galvanometer has a coil resistance of Rgalv = 61.7 Q. It is to be made into an ammeter with a…

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Q: Consider the circuit shown. Before the switch is closed, both capacitors are uncharged. V = 9.00 V,…

A: Recall Immediately after switch is closed, capacitor offers zero resistance to current. Also R1 R2…

Q: A battery with Ɛ = 4.80 V and no internal resistance supplies current to the circuit shown in the…

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Q: For a long period of time the switch S in position "b". At t = 0 s, the switch S moved from position…

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Q: Consider the circuit shown. Before the switch is closed, both capacitors are uncharged. V = 12.0 V,…

A: V = 12 volts  R1 = 90 Ω R2 = 30 Ω R3 = 60 Ω C1 = 5 × 10-⁶ F  C2 = 3×10-⁶ F

Q: An ordinary gold wedding ring is tossed end over end into a running MRI machine with a 4.0 T field.…

A: Write the provided data with the appropriate variables.Here, B is the time spent, R is the…

Q: A galvanometer has a coil resistance of Rgalv=97.2 Ω. It is to be made into an ammeter with a…

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Q: When operated on a household 110.0 V line, typical hair dryers draw about 1450 W of power. The…

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Q: In the figure R₁ = 9.69 kQ, R₂ = 15.9 kn, C = 0.379 μF, and the ideal battery has emf ε =20.0 V.…

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Q: In the circuit of the figure & - 1.33 kV, C - 7.30 µF, R1 = R2 - R3 = 0.830 MQ. With C completely…

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Q: The figure indicates one reason no one should stand under a tree during a lightning storm. If…

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Q: In the circuit of the figure & = 1.70 kV, C = 9.50 µF. R = R2 = R3 = 0.750 MQ. With C completely…

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Q: A battery with Ɛ = 8.60 V and no internal resistance supplies current to the circuit shown in the…

A: Given: Emf, ε=8.60 V I∘=8.60 mAIa=1.00 mAIb=1.16 mA When the switch is open, Resistances R1,R2,R3…

Q: 9. An electric power station that operates at 35 kV and uses a 10:1 step-up ideal transformer is…

A: We know that, the Transformer ratiowill be the transmitted voltage now the current transmitted is…

Q: In the figure, e = 94.8 V, R1 = 7.80 Q, R2 = 27.0 Q, R3 = 30.7 Q, and L = 1.65 H. Immediately after…

A: Since we answer up to three subparts, we will answer the first three. Please resubmit the question…

Q: You are camping in the wilderness. After a few days, you are horrified to discover that you did not…

A: Given data: Angular speed =2.5 rev/sec ε0=55 v w0=1600 rev/min ε=8 v Find: Average back emf of the…

Q: 0.364 kg toy car is powered by two C cells (3.00 V total) connected directly to a small DC motor.…

A: GivenMass of toy car(m)=0.364 kgVoltage(V)=3 VEffective energy conversion…

Q: In the circuit of the figure 8 = 1.20 kV, C = 8.00 µF, R1 = R2 = R3 = 0.930 MQ. With C completely…

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Q: epresented by the variable j

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Q: In the figure R₁ = 9.69 kQ2, R₂ = 15.9 kQ, C = 0.379 μF, and the ideal battery has emf ε =20.0 V.…

A: Given Data:The resistance of resistor 1 is The resistance of resistor 2 is The capacitance of the…

Q: n the circuit of the figure = 2.80 kV, C = 7.80 µF, R₁ = R₂ = R3 = 1.05 MQ. With C completely…

A: a) i1= 1.78 mA   b) i2= 0.889 mA   c) i3= 0.889 mA   d)  i1=1.33 mA   e)  i2= 1.33 mA   f)  i3= 0 A…

Q: The capacitor in the circuit shown below is initially uncharged. The switch is closed at t = 0 s.…

A: The objective of the question is to find the charge on the capacitor at a certain time after the…

Q: In the circuit shown in the figure, all five resistors have the same value, 100 Ω, and each cell has…

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Q: Chapter 27, Problem 065 GO In the figure R₁ = 10.9 kN, R₂ 15.0 kN, C = 0.430 µF, and the ideal…

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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.