The self inductance of the coil in the electric motor of the Prius is 200 mH. When the car starts current from a 250V supply increases from 0 to 60 amp in 0.1 sec. In the first 100 milliseconds the back emf from the inductance of the motor is (a)   130 V (b)   120 V (c)     30 V (d)   220 V (e)   180 V

Q: A circuit is constructed with four resistors, one inductor, one battery and a switch as shown. The…

A:

Q: A V = 47.0 V power supply fully charges a capacitor with capacitance C = 1.37 µF. The capacitor is…

A: The LC circuit described above performs oscillations, where at a time, the total energy in the…

Q: Two coils are placed near each other and they have a mutual inductance of 879.1 mH. If the current…

A: mutual inductance(M)=879.1 mH=879.1×10-3H  current i(t)=0.5e-1,625.3t to find: induced emf at…

Q: At time t = 0, a 12.0 V potential difference is suddenly applied to the leads of a coil of…

A:

Q: Suppose that a rectangular toroid has 2,000 windings and a self-inductance of 0.060 H. If the height…

A: The energy stored in an inductor is, U=12LI2

Q: Two coils close to each other have a mutual inductance of 32 mH. If the current in one coil decays…

A: The expression for the EMF of a coil, ε=-dϕdtThe magnetic flux of the coil isϕ=MI

Q: Two coils have a mutual inductance of 480mH. One coil is supplied with a current given by I(t) = 3t2…

A:

Q: A 75-turn coil has a diameter of 10 cm. The coil is placed in a spatially uniform magnetic field of…

A: We know that induced emf  ε=-NAdBdt.........(1)

Q: A Tesla coil consists of a long solenoid with length L = 0.5 m that is closely wound with N1 = 1000…

A: Given data: The length of solenoid is L=0.5 m. The number of turns are, N1=1000N2=10 The area of…

Q: A 12 H inductor carries a current of 2 A. At what rate must the current change to produce a 60V emf…

A:

Q: A conducting coil, with current i(t) = 4.00e-0.0250t sin(120at), with i in amperes and t in seconds,…

A:

Q: A physics student observes that the current in a coil of conducting wire goes from i, = 0.200 A to…

A: Given: Inductance L = 4mH or 0.004 H                               i1= 0.200 A…

Q: A wire loop of radius 0.33 m lies so that an external magnetic field of magnitude 0.35 T is…

A: Radius of loop (r) = 0.33 m Initial magnetic field (B) = 0.35 T Final magnetic field (B') = -0.16 T…

Q: At a certain instant the current flowing through a 5.0-H inductor is 3.0 A. If the energy in the…

A:

Q: motor has coils with a resistance of 42.0 Ω and operates from a voltage of 240 V. When the motor is…

A: The back emf is represented as a variable emf that opposes the one driving the motor. Back emf is…

Q: A generator with an adjustable frequency of oscillation is wired in series to an inductor of L =…

A:

Q: A coil of self-inductance 10 mH and resistance 0.1 Q is connected through a switch to a battery of…

A:

Q: A ten-loop coil having a radius of 5.87 cm and a resistance of 48.9 Ω is in a 0.083 T uniform…

A: The expression for the induced emf is given by -  ε=N∆ϕB∆t .....(1) Where,…

Q: A generator consists of few turns of wire, and each turn has an area of 0.085 m2. If a maximum e mf…

A: Given Data : The area of each turn is given as A=0.085 m2 The maximum EMF generated in the generator…

Q: A coil has an inductance of 3.00 mH, and the current through it changes from 0.200 A to 1.50 A in a…

A: When magnetic flux linked with a coil changes then emf get induced in the coil according to Lenz's…

Q: 10 and 11 please

A: 10. When an emf is produced in a coil because of the change in current in a coupled coil, this…

Q: In the circuit shown, the switch is con- nected to position a for a long time, then thrown to…

A:

Q: Two coils are placed near each other and they have a mutual inductance of 887.4 mH. If the current…

A:

Q: The current in a coil drops from 3.8 A to 1.8 A in 0.51 s. If the average emf induced in the coil is…

A:

Q: A coil is connected in series with a 11.9 kΩ resistor. An ideal 59.5 V battery is applied across the…

A:

Q: A 14.0 V battery is connected in series with a resistor and an inductor. The circuit has a time…

A:

Q: A 5.00 [cm] long solenoidal inductor has 50 turns and radius of 3.00 [cm]. If the current varies at…

A:

Q: A coil with an inductance of 2.0 H and a resistance of 10ohm is suddenly connected to an ideal…

A:

Q: A circular coil with a diameter of 12.75 cm is made up of thin wire wound into 445 turns. It is…

A: Given  Diameter = 12.75 × 10-2 m  Number of turn N = 445  Rate of change of magnetic field = dB/dt =…

Q: A 12 H inductor carries a current of 2.0 A.At what rate must the current be changed to produce a 60…

A: The induced emf in terms of inductance is

Q: A coil with an inductance of 2.6 H and a resistance of 8.2 Ω is suddenly connected to an ideal…

A:

Q: coil has 2.55-Ω resistance and 121-mH inductance. If the current is 3.00 A and is increasing at a…

A:

Q: A 96-mH solenoid inductor is wound on a form 0.80 m in length and 0.10 m in diameter. A coil is…

A: Given: Inductance of inductor, L = 96 mH = 96 X 10-3 H Length of wire, l = 0.8 m Diameter of wire, d…

Q: What is the mutual inductance of two coils if an average electromotive force of 0.15 V was induced…

A:

Q: A 9.9-V battery, a 5.01-0 resistor, and a 9.1-H inductor are connected in series. After the current…

A: The solution is given below

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…

A:

Q: In 3.0 s, the current in a particular RL circuit that consists of a battery, a resistor, and an…

A: Given, Resistance=3ohm Time=3s We have to find the inductance

Q: Find the energy stored in the magnetic field of an inductor having inductance 12.5 mH carrying the…

A: The expression for the stored energy is,

Q: A coil of conducting wire carries a current i. In a time interval of At = 0.480 s, the current goes…

A:

Q: When the current in a toroidal solenoid is changing at a rate of 0.234 A/s, the magnitude of the…

A: Given: current in the toroidal solenoid is changing at a rate of 0.234 A/s induced emf is 9 mV…

Q: A 96-mH solenoid inductor is wound on a form 0.80 m in length and 0.10 m in diameter. A coil is…

A:

Q: At a certain instant the current flowing through a 5.0-H inductor is 3.0 A. If the energy in the…

A: Given data: Current I=3.0A Inductance L=5.0H Change in Energy dE/dt=3.0J/s

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.