The switch in the circuit was closed a long time ago . What is the energy stored in the magnetic feild of the inductor? Options below have units mJ a. 42 b.2.5 c.90 d. 10 e.0

Q: Suppose a motorcycle increases the downward componentof the magnetic field within a loop only from…

A: side of square,  s =0.75 m  induced emf, e = 1.4 x 10-4 V Change in magnetic field, dB = (1.9 -1.2)…

Q: 200-mA current flows in a small solenoid which stores 20 μJ of magnetic energy. The inductance of…

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

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Q: The energy stored in a solenoid inductor is 28.4 J. The solenoid is .876 m long and has a radius of…

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Q: After investigating the voltage, V, induced in a coil due to motion of the magnet, a group produced…

A: Required : What should they do next after producing the model.

Q: A magnet is moving toward a solenoid and a potential difference is induced between the two ends of…

A: a) if the speed of magnet is increased induced emf will increase because rate of change of flux will…

Q: Self-inductance. A coil has a self-inductance of 50 [H] and a resistance of 3.5 [2]. It is connected…

A: Given  Self inductance L = 50 uH Resistance  R = 3.5 ohm Internal resistance of battery r = 0.25 ohm…

Q: A transformer has 20 turns of wire in its primary coil and 50 turns of wire in its secondary coil.…

A: Given data:  Number of turns in primary coil (N1) = 20 turns Number of turns in secondary coil (N2)…

Q: Self-inductance. A coil has a self-inductance of 50 [μH] and a resistance of 3.5 [N]. It is…

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Q: A circular coil of 50 turns and radius 8.0 cm is placed with its plain oriented at 90ﾟ to a magnetic…

A: Given data: Number of turns in the coil, N=50 The radius of the coil, r=8.0 cm=0.08 m The angle of…

Q: In which of the given cases, the induced current in the loop will not be obtained A. The loop and…

A: According to Faraday's law, an Emf is produced across a conductor when the magnetic flux is…

Q: cylindrical solenoid with 2,000 turns, a radius of 6.00 cm, and a length of 40.0 cm is initially…

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Q: 12. A current that changes as I=11-22-t, where the current is in milliamperes and the time is in…

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Q: The current in an 80-mH inductor increases from 0 to 60 mA. How much energy is stored in the…

A: Given data:  Inductance (L) = 80 mH Current (I) = 60 mA Required: The energy stored in the inductor…

Q: A 10 cm diameter circular loop of wire is in a 5.00 -T magnetic field. is removed from the field in…

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Q: of the following statements are true? Choose all that apply. changing magnetic field will always…

A: There are statements given. We need to Choose true statements.

Q: A given solenoid has a 5 H self-inductance. Calculate for the magnitude of the induced electromotive…

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Q: what is the inductance of a coil wire that generates an instantaneous voltage of 1 v when the…

A: Given: Voltage V=1 V Rate of change of current dIdt=0.1 A/s

Q: A circular loop with a radius of 2.5 m rests horizontally inside a uniform magnetic field of 0.9 T…

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Q: Suppose that you wish to construct a simple ac generator having an output of 12 V maximum when…

A: Given: The emf (V) output of the ac generator is 12 V. It is rotated at a frequency (v) of 60 Hz.…

Q: How much current is required if this four-winding solenoid can create 1mT? A. 3.98 A B. 6.10 A C.…

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Q: The energy stored in a solenoid inductor is 28.4 mJ. The solenoid has 425 turns, is .876 meters long…

A: Given: The energy stored in the solenoid inductor is 28.4 mJ. The number of turns is 425. The length…

Q: A circular coil of 50 turns and radius 8.0cm is placed with its plane oriented at  90 degrees to a…

A: Given The number of turns in the coil is N=50 The radius of the coil is r=8.0 cm=0.08 m The angle…

Q: A square coil of wire with a side length of 10 cm is looped around 10 times. The coil sits in an…

A: Given The length of the square coil is L=10 cm=10×10-2 m. The number of loops is N=10. The initial…

Q: A wire 0.2 m long moves at a constant speed of 5 m/s in a direction that is 37o with respect to a…

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Q: A conducting wire loop of radius 12 cm, that contains a 4.0-2 resistor, is in the presence of a…

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Q: Self-inductance. A coil has a self-inductance of 50 [H] and a resistance of 3.5 [2]. It is connected…

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Q: When the current in a solenoid uniformly increases from 3.0 A to 8.0 A in a time 0.25 s, the induced…

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Q: 10. A coil of 50 turns and area 0.5 m^2 is in magnetic field of induction 2 x 10 -3 Wb/m^2. If the…

A: The induced e.m.f  given as the rate of change of magnetic linkage is, expressed as, Here N denotes…

Q: A coil has a self-inductance of 50 [H] and a resistance of 3.5 [2]. It is connected to a 9.0 [V]…

A: self inductance (L) = 50 micro henryresistance (R) = 3.5 ohm resistance of the battery (r) = 0.25…

Q: A 120V e.m.f is across a transformer's 200-turn primary coil. How many turns should a secondary coil…

A: given is  input voltage = 120 v output voltage 30 v turns on primary coil = 200 turns on secondary…

Q: At t=0: coil plane is parallel to B Rectangular coil of 200 windings S N S N 5 cm 10 cm B = 2T

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Q: A conducting wire loop of radius 12 cm, that contains a 4.0-Ω resistor, is in the presence of a…

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Q: A circular coil has 250 turns and radius 1.50 cm. When a current of 5.00 A flows in the coil, the…

A: Given, Number of turns n=250 Radius R=1.50 cm Current I=5.00 A Magnetic flux density B=0.050 T

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.