Magnetic resonance imaging instruments use very large magnets that consist of many turns of superconducting wire. A typical such magnet has an inductance of 40 H. When the magnet is initially powered up, the current through it must be increased slowly so as not to “quench” the wires out of their superconducting state. One such magnet is specified to have its current increased from 0 A to 150 A over 200 min. What constant voltage needs to be applied to yield this rate?

Q: (a) What is the emf across the inductor immediately after the switch is opened?  V (b) When does…

A: Detailed solution is given below:     Please UPVOTE dear sir

Q: A battery of emf E is connected in series with a resistor, an inductor L. and a switch S. A…

A:

Q: 6.0 μsμs after the switch of (Figure 1) is moved from 1 to 2, the magnetic energy stored in the…

A:

Q: Where a 44 V battery is connected to three resistors and an inductor with values R1 = 96 Ω, R2 = 24…

A: An inductor has the tendency to resist the change in current in the circuit. When a switch is…

Q: After being closed for a long time, the switch S in the circuit shown in the figure below is thrown…

A: The circuit diagram is shown below.

Q: Consider a 27.5 mH inductor that has a resistance of 4.25 Ω. a) What is the time constant, τ, of…

A:

Q: Problem 8: Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once…

A: Part (a)Find the relation between current, power and voltage.

Q: The switch in the circuit shown in the figure has been open for a long time. The resistors in the…

A:

Q: An ideal inductor L=100 mH is connected to a source whose peak potential difference is 65 V. a) If…

A:

Q: A solenoid consists of 4200 turns of copper wire. The wire has a diameter of 0.200 mm. The solenoid…

A: -

Q: A circuit consists of a large electromagnet that has an inductance of 48.0 H and a resistance of…

A: Inductance (L) = 48 H Resistance (R) = 7.9 ohm Vb = 250 V Maximum current (Im) = VbR= 2507.9= 31.645…

Q: Consider a 23 mH inductor that has a resistance of 4.15 Ω. Time constant is 0.00554. If the…

A: Given that  L=23 mH R=4.15Ω Time constant τ=0.00554 s

Q: The circuit shown in the diagram has a switch which is turned on at time t = 0, and it is known that…

A: Given, Q0=2.0 μCC=1.0 nFL=10.0 μH

Q: Basic of electrical circuits (a) A 5 μH inductor is driven by a current I(t) = 10 sin (27 10t) mA.…

A:

Q: An electromagnet can be modeled as an inductor in series with a resistor. Consider a large…

A:

Q: inductance

A:

Q: An ac electrical generator is made by turning a flat coil in a uniform constant magnetic field of…

A:

Q: a circuit having an inductance of L=2mH has a current that varies with time as I=t^3e^-t. find the…

A: Emf induced can be given by, ∈=LdIdt where L is inductance and I is current and t is time.  To be…

Q: A circuit has a battery (emf) of 12 V, a resistance R = 0.3 and an inductance of 53 mH. After how…

A:

Q: In and L-C circuit, C=3.19 microFarads and L=81.0 mH. During the oscillations the maximum current in…

A:

Q: An RLC circuit has a resistance of (3.160x10^2) S2, an inductance of (1.4x10^1) mH, and a…

A:

Q: Consider the RL circuit in the figure with R=10.00 Ω, L1=1.80 H, L2=3.90 H, and V=5.0 V. At time…

A:

Q: A 10-turn ideal solenoid has an inductance of (3.9x10^-3) H. To generate an EMF of (1.16x10^0) V…

A: Given ,  N = 10 L = 3.9 ×10-3  H e (emf ) = 1.16 V Here we have to find rate of change of the…

Q: A circuit consists of a large electromagnet that has an inductance of 48.0 H and a resistance of…

A:

Q: n inductor has a peak current of 330 A when the peak potential is 2.2V at 45 MHz. What is the…

A:

Q: A 10.00 μF capacitor C is initially charged to a voltage V of 10.00 (V). It is then connected in…

A:

Q: about the structural integrity of the coil and requests that part. (Enter the magnitude.)

A: Given: To find the total energy and compressive force of the method with the given values as,

Q: The switch in the figure below is connected to position a for a long time interval. At t = 0, the…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

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.