E (mV) 10 5 t (ms) 3 2 -5 -10 Figure P30.24

Q: Question 3: Induction (a) The rod shown below moves to the right on essentially zero-resistance…

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Q: A wire loop with a resistance, R = 0.160 Ohms is pulled to the right out of a region with a uniform…

A: The expression for the required force is,

Q: A Generator Bike. You and your team are designing a generator using a stationary bike to rotate a…

A: The peak emf (ε) produced by the generator bike can be calculated using Faraday's law of…

Q: Emk e = 300V, resistor R = 10N, switch S and a toroid of N = 10* number of turns are connected in…

A:

Q: The conducting bar in the figure below is 0.1 m long and moves to the right with a speed of 10 m/s…

A: Length (L) = 0.1 m speed (v) = 10 msMagnetic field strength (B) = 1.5 T

Q: You Answered Correct Answer A circular loop of wire of cross-sectional area A=14.9cm² consists of…

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Q: The flexible loop in the figure below has a radius of 14 cm and is in a magnetic field of strength…

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Q: A rectangular loop of wire with sides 1 cm and 2 cm is placed inside an extremely long solenoid of…

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Q: A variable magnetic field is perpendicular to a 195-turn coil of area 0.305 m?. The magnetic field…

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Q: A 14-turn ideal solenoid has an inductance of (4.100x10^0) mH. When the solenoid carries a current…

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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 circular conducting loop of 5 turns and 0.040 m in radius is perpendicular to a magnetic field of…

A: Magnetic flux is defined as the product of a Magnetic field and the area of the loop it passes…

Q: A student uses a coil of radius 12 cm with 95 windings. She then uses a permanent magnet of strength…

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Q: The graph shows the magnitude B(t) of a uniform magnetic field that passes through a conducting…

A: We have to apply the Faraday law of electromagnetic induction.

Q: A 48 turn conductive loop encloses an area of 71 m 2 At what constant rate should the magnetic field…

A: Given, Number of turns N = 48  Area A = 71m2 emf ε=3.58 Volts   We know the expression for induced…

Q: The flexible loop in the figure below has a radius of 13 cm and is in a magnetic field of strength…

A: Given that radius of the flexible loop and strength of magnetic field and time takes to close the…

Q: A 20.9 turn conductive loop encloses an area of 0.57 m2. At what constant rate should the magnetic…

A: Given:-             A 20.9 turn conductive loop encloses an area = 0.57 m2.…

Q: A long solenoid with 15 turns per cm has a small loop of area 2.0 cm? placed inside the solenoid…

A: Given that,Magnetic field associated with current in a solenoidB=μ0nI      Equation 1Change in flux…

Q: A coil has an area of 100 cm2 with 198 turns connected across a 5.00 Q resistor to form a closed…

A: The expression for the induced emf is written as, Here, N, Δφ and Δt represent the number of turns…

Q: 14-turn ideal solenoid has an inductance of (3.9x10^0) mH. When the solenoid carries a current of…

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Q: A flexible circular wire expands such that its radius increases linearly with time. It is located in…

A: We need to show that the emf induced in the wire varies linearly with time if the radius of wire…

Q: An N= 1,246-turn conducting loop with an area of A = 0.112 m² rotates in a uniform magnetic field so…

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Q: The problem below explores the basic principle behind electric motors, which we will discuss in…

A: Area of the loop, A = H×W = 59.6744 m² Current, I = 6.62 A Magnetic field, B = 5.03 T Number of…

Q: (a) Define self and mutual induction. Give practical examples of both inductions. (b) A circular…

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Q: magnet is moved from left to right toward a horizontal solenoid with the south pole first. What is…

A: According to Lenz's law  Induced current (emf) always opposes the cause by which it is produced.

Q: A conducting copper bar is traveling at a constant speed of 1 m/s on conducting rails in uniform…

A: As          P=Fv=i^2R And F=ilB

Q: A conductive rectangular loop is being pulled at constant speed v out of a region of uniform…

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Q: An instrument based on induced emf has been used to measure projectile speeds up to 6 km/s. A small…

A: The emf induced in a coil when a magnet passes through it can be expressed as,

Q: (a) Draw a graph of the induced EMF versus time, numerically identifying the maximum and minimum…

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Q: A flexible circular wire expands such that its radius increases linearly with time. It is located in…

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Q: A 500-turn coil of area 0.00200 m^2 is rotated in a 2.00 T magnetic field. At what frequency, f,…

A: When coil rotated in a magnetic field, Flux linked with the coil at time 't' ; a) ϕ=NBA cosωt…

Q: A metal bar of length L = 2.8 m slides along two horizontal metal rails as shown in the figure…

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Q: the emf of a coil rotating in a magnetic field is zero at t = 0 and increases to its first peak at t…

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Q: The changes of magnetic flux passing through a loop in terms of time in induction are shown in the…

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Q: A simple AC generator consists of 10 turns of coils with an area of 1000 cm. It rotates at a…

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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.