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Q: The figure shows a 10-cm-diameter loop in three different magnetic fields. The loop's resistance is…

A: Given :- loop diameter = 10 cm = 0.1 m Radius r= 0.1/2 = 0.05 m Resistance R = 0.10 Ω

Q: A square wire loop with 2.00 m sides is perpendicular to a uniform magnetic field, with half the…

A: Side of Square loop is a = 2.00 m Emf of the battery is E = 20 V Magnitude of field varies as…

Q: By changing the magnetic flux through a coil of resistance 500 N, a current is induced in the coil…

A: Here we have to use Faraday law

Q: A 6.0 H coil whose resistance is 120 is connected in series with a 24 Q resistor and to a 144 V…

A: Given: L= 6.0 H resistance of coil = 12 ohm resistance of resistor = 24 ohm voltage applied V = 144…

Q: A square coil of wire of side 2.25 cm is placed in a uniform magnetic field of magnitude 2.00 T…

A: Here length of square = 2.25 cmUniform magnetic field = 2TTurns of the coil (N) = 27.5Resistance (R)…

Q: 1. In a coil of resistance 100 2, a current is induced by changing the magnetic flux through it as…

A:

Q: A conducting rod of length , moves on two horizontalfrictionless rails, as in Figure P20.30. A…

A: Part A:

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: Consider the arrangement shown in the figure below. Assume that R = 6.00 Q, I=1.20 m, and a uniform…

A: Given data: R=6 ohml=1.2 mB=2.5 TI=2.7 A Need to determine the speed of bar.

Q: The flexible loop in Figure P20.10 has a radius of 12 cm and is in a magnetic field of strength 0.15…

A: Given:  radius, r = 12 cm = 0.12 m  magnetic field, B = 0.15 T  t = 0.2 s

Q: *Chapter 30, Problem 021 In the figure, a stiff wire bent into a semicircle of radius a = 2.7 cm is…

A:

Q: Below is a rectangle that is being pulled into a magnetic field as shown.  The rectangle has a…

A: GIVEN:- h=0.680 m, v=155m/s ,R=11.50 ohms, B=48mT Introduction:- We know that In motional…

Q: A metal bar with length L = 0.40 m „mass m = 200 gram, and resistance R = 10 N is placed on…

A: Length of Bar= 0.4 m Mass= 0.2 Kg Resistance = 10 Ohms Magnetic Field= 1.4 T g= 10 m/s^2

Q: The figure shows a rod of length L = 8.84 cm that is forced to move at constant speed v = 4.19 m/s…

A: We have to find the rate at which the force works on the rod. So this means that we have to find the…

Q: 5) A metal bar with length L= 0.50 m, mass m = 80 gram, and resistance R = 5 N is placed on fri…

A:

Q: Consider the system pictured in Figure P19.21. A 15-cm length of conductor of mass 15 g, free to…

A:

Q: (d) What is the mechanical power delivered by the applied constant force (in W)? W What If? Suppose…

A:

Q: Figure P20.29 shows a bar of mass m = 0.200 kg that can slidewithout friction on a pair of rails…

A: The below figure indicates the magnetic field of the bar,

Q: Magnetic field values are often determined by using a device known as a search coil. This technique…

A: The emf induced in the coil is given by, Where N is the number turns in the coil and (Φ2 - Φ1) is…

Q: Consider the arrangement shown in the figure below. Assume that R = 6.00 Q, I=1.20 m, and a uniform…

A: The bar should be moved at a speed of 23.4 m/sec to produce a current of 11.7 A in the resistor.

Q: The square loop in Figure P20.62 is made of wires with a total series resistance of 10.0 Ω. It is…

A: the calculate the average current generated is,

Q: Figure P20.29 shows a bar of mass m = 0.200 kg that can slide without friction on a pair of rails…

A: It is given that,

Q: Consider the arrangement shown in Figure P20.30. Assume R = 6.00 V, ℓ = 1.20 m, and a uniform 2.50-T…

A:

Q: A circular loop of wire of resistance R = 0.500 V and radius r = 8.00 cm is in a uniform magnetic…

A:

Q: Consider the mass spectrometer shown schematically in Figure P19.36. The electric field between the…

A: The electric field between the plates of the velocity selector,

Q: The figure shows a rod of length L 8.84 cm that is forced to move at constant speed v 4.19 m/s along…

A: Given : Length of the rod. L = 8.84 cm = 0.0884 m Speed of the rod, v = 4.19 m/s Resistance of the…

Q: A generator connected to the wheel or hub of a bicycle can be used to power lights or small…

A:

Q: A conducting rod of length l moves on two horizontal, frictionless rails as shown. If a constant…

A: Current through resistor can be determined as Using energy conservation, we can equate (1) and (2)…

Q: Consider the arrangement shown in the figure below where R = 5.50 Ω, ℓ = 1.40 m, and B = 2.25 T. a)…

A:

Q: A square coil of wire of side 3.90 cm is placed in a uniform magnetic field of magnitude 2.25 T…

A:

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: Consider the arrangement shown in the figure below where R = 8.00 Q, { = 1.10 m, and B = 2.00 T. B.…

A:

Q: A conducting rod of length { moves on two horizontal frictionless rails, as in the figure below. A…

A:

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: Which of the statements describes how a motor works?  a. A motor works by changing the magnetic flux…

A: Electromagnetic or magnetic induction is the production of an electromotive force across an…

Q: The figure shows a rod of length L = 8.84 cm that is forced to move at constant speed v = 4.19 m/s…

A: (e) the external agent does work at the rate, Power,   P= F×v Given, Force applied to rod  F=…

Q: In the figure below, a metal bar sitting on 2 parallel conducting rails connected to each other by a…

A: Givens: Magnetic field, B=2.10 T Distance between the rails, l=1.2 m Resistance, R=9 Ω Current,…

Q: (9) A conducting rod of length l= 25 cm is placed on a U-shaped metal wire that is connected to a…

A: Given  length(l)=0.25 m resistance (R)=8.0 ohms magnetic field (B)=0.40 T speed (v)=6.0 m/s Required…

Q: The bolt of lightning depicted in Figure P20.61 passes 200. mfrom a 100-turn coil oriented as shown.…

A:

Q: 15) A metal bar with lengthL = 0.60 m ,mass m = 100 gram, and resistance R= 15 0 is placed on…

A:

Q: When a magnet is thrust into a coil as in 23.4(a), what is the direction of the force exerted by the…

A: Refer to Figure 23.4 (a). The direction of force is downward because motion of magnet is always…

Q: Q2 A conducting rod of length l= 35 cm is free to slide on two parallel conducting bars as shown in…

A: Since the rod is pulled towards the left, the area of loop on left side is decreasing, thus the flux…

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.