A 5 H inductor carries a current of 2 amps. How can a self-induced EMF of 50 volts be made to appear across the inductor? Change the current to 10 A. Change the current uniformly to zero in 20 seconds. Break the circuit instantaneously. Change the current at the rate of 10 A/s None of these

Q: A 2.0 H inductor carries a constant current of 0.5 A. When the switch in the circuit is opened, the…

A: Inductance (L) = 2 H  Initial constant current (I) = 0.5 A  Final current (I') = 0 A  Time (t) = 20…

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: Two coils, 1 and 2, are separated in space, and have a fixed distance between them. When coil 2 has…

A: Given the emf in the second coil ε2 = 30 mV = 30×10-3 V The rate of change of current in the first…

Q: A 385 pF capacitor is charged to 155 V and then quickly connected to a 145 mH inductor. Part A)…

A:

Q: . A large research solenoid has a self-inductance of 20.0 H.   What induced emf (in V) opposes…

A: Inductance of an inductor                                    L = 20.0 H Current passed through…

Q: At time t-0, the switch is closed. What is the current thru the inductor L after a long time? O 3.0A…

A:

Q: How much of a change in current over time would produce a self-induced EMF of 6.00V in a  10µH…

A: self induced emf produced, ε=6.00 V Inductance in an inductor, L=10 μH=10×10-6 H=10-5H self…

Q: 3. A 12.0 V battery is connected in series with a 10.0 O resistor, an inductor and a switch. At time…

A:

Q: Two coils close to each other have a mutual inductance of 29 mH. The current in one coil decays…

A: Given :- L = 29 mH I = I0 e-αt Io = 6A α = 1.5 * 10^3  s-

Q: 1. A large research solenoid has a self-inductance of 26 H. (a) What induced emf opposes shutting it…

A:

Q: Questions (30) and (31) are based on the following statement. A coil with a self-inductance of 2H…

A:

Q: Inductor 1 stores the same amount of energy as inductor 2, although its inductance is only half the…

A:

Q: How much current would have to pass through a 10.0 mH inductor s would be enough to bring…

A: Hi please find solution to your problem  Formula used  E = 1/2 *L*I^2

Q: The self-inductance of the circuit in the figure below is 9.10 x 10-8 H. Find the back emf when the…

A:

Q: Two coils close to each other have a mutual inductance of 23 mH. The current in one coil decays…

A:

Q: The voltage across an inductor is proportional to the inductor and the derivative of the current…

A: As we know that,          Voltage across Inductor is given by :…

Q: 3. Consider the circuit shown below. The switch S is closed for a very long time so that the current…

A:

Q: In the circuit shown, the switch S is closed at time t=0. a) Find the current in the 100 2 resistor…

A:

Q: An inductor in the form of a solenoid contains 430 turns and is 17.4 cm in length. A uniform rate of…

A:

Q: The current i through a 4.7 H inductor varies with time t as shown by the graph of the figure. The…

A: The induced emf (ε) in a coil, with an inductance of L as a result of the change in current ∆I in ∆t…

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

A: Choose true statements.

Q: What is the instantaneous value of the emf in the coil at t= s? Assume that the emf is 22 zero at t…

A:

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.