Consider a solenoidal coil initially carrying a time- varying current i(t) wrapped around a second coil. If the current in the first solenoid is set to 2i(t), which of the following quantities would double in magnitude for the second solenoid (assuming these quantities

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: Suppose the 50 turn coil in the figure below lies in the plane of the page and originally has an…

A: Given:no of turns, n = 50Initial area, Ai = 0.270 m2Final are, Af = 0 m2Time taken, t = 0.1…

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

A:

Q: A car generator turns at 390 rpm when the engine is idling. Its 296-turn, 5.04 cm by 7.99 cm…

A: Given data, 390 (rpm); N=296-turns; rectangular coil having, a=5.04 cm, b=7.99 cm; peak emf, ε=24.4…

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

A:

Q: A square loop of side a lies on the a - y plane as shown in the figure. There exists a magnetic…

A: Answer  option(g) a3t

Q: QUESTION 7 You are looking down at a conducting loop and there is a extemal magnet field coming out…

A: QUESTION 7 According to right hand thumb rule, if thumb points in the direction of magnetic field…

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: When the N pole of a magnet is moved at velocity v toward the end of solenoid, an emf is induced…

A: Assume the north pole of the magnet is moved into a solenoid, an electromotive force ( emf ) is…

Q: A circular loop in the plane of the paper lies in a 0.75-T magnetic field pointing into the paper.…

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Q: Any change in magnetic flux induces an emf. Explain it?

A: According to the laws of electromagnetic induction, when the magnetic flux linked with the coil…

Q: A coil of 1000 turns encloses an area of 25 cm2 and is in a magnetic field of strength 3e-6 T which…

A: Number of turns (N) =1000 Area (A) = 25 cm2  B1 = 36e-6 T  B2 = 0 T  ∆t = 0.5 min = 30 sec  (half a…

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: A long solenold with a circular cross section has n turns per unit length and radlus R The current…

A: We know that, magnetic field (B) outside a long solenoid can never be zero. Because a solenoid of…

Q: The metal rod 1 m long rotates about its one end in a plane at right angles to a horizontal magnetic…

A: To find-Induced emf (e)=?Given-Length of the rod (l)=1 mfrequency (n)=100 rpsMagnetic induction…

Q: 6. A rod slides along conducting rails which are connected to a resistor (R=2 N). The length of the…

A: a) value of induced emf = 4.35V b) magnitude of induced current = 2.175 A and direction is…

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

A:

Q: In the figure, a 110-turn coil of radius 2.10 cm and resistance 6.80 N is coaxial with a solenoid of…

A: Number of turns , N = 110 Radius , r = 2.1 cm = 0.021 m Resistance , R = 6.8 Ω Number of turns per…

Q: True or The SI unit of flux is the tesla while the SI unit of flux density is the weber.   True or…

A: Given: Various statements. To  Tell whether the statement is true or false.

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: An inductor used in a de power supply has an inductance of 12.0 H and a resistance of 180 ohms. It…

A: Here inductance = L = 12.0 H resistance = R =180 ohms. current = I = 0.50 A. We have to calculate…

Q: Which of the following statements is TRUE when the magnet is dropped inside the solenoid? A. The…

A: When the magnet is dropped inside a solenoid, magnetic flux increases through the solenoid. It keeps…

Q: How much current does a long wire carry if it produces a magnetic field of magnitude 4.6 microteslas…

A: Strength of magnetic field (B) = 4.6 × 10-6 T  Field distance (r) = 0.21 m

Q: An air-cored solenoid with length 30 cm, area of cross-section 25 cm2 and number of turns 500,…

A:

Q: Generator and Transformer - Applications of Electromagnetic Induction Electricity Generator Induced…

A: Given, The magnetic field, B=1.29T The number of turns, N=200 The radius of the coil, r=0.060m a.…

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: The magnitude of the induced current in a stationary conducting (secondary) loop: O a. Depends only…

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Q: Now the switch on the electromagnet is reopened. The magnitude of the external magnetic flux through…

A: As the switch is reopened, current through circuit becomes zero. Hence the magnetic field through…

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.