For a transformer with primary turns 400, secondary turns 100, if 20A current is flowing through primary, we will get ___________ a) 80A at secondary b) 5A at secondary c) 800A at secondary d) 40A at secondary

Q: An American traveler in Kenya carries a transformer to convert Kenya's standard 240 V to 120 V so…

A:

Q: A transformer uses iron to make sure that all the magnetic flux passing through the primary…

A:

Q: The switch in a R-L circuit is closed allowing current to flow from a 12 volt battery. If the…

A: In R-L circuit, The potential difference of the battery is V = 12 V. The resistance of the resistor…

Q: 1) If the electrical power lines in a certain neighborhood deliver electricity at 72,000 volts,…

A: Primary voltage Vp = 72000 volts Secondary voltage Vs = 120 volts

Q: econd. A e EMF ov

A:

Q: Which particular part of a the motor can be used to identify an "AC motor? O a Split rings O b.…

A: Which particular part of the motor can be used to identify AC motor ?

Q: Why does an electric arc often appear in a switch at the moment it is opened if there is an inductor…

A: electric arc often appear in a switch at the moment

Q: 1. ) The magnetic flux through a coil containing 10 loops changes from 20Wb to-20Wb in 0.03s. Find…

A: Given data: Number of loops, N=10 Initial flux, ϕi=20 Wb Final flux, ϕf=-20 Wb Time taken, dt=0.03…

Q: A flux 25x105 Maxwell links with a 1500 turn coil when a current of 3 A passes through the co a)…

A:

Q: State two factors on which the magnitude of induced emf in a coil depend.

A: induced emf in the coil depends on many factors,1) number of turns in the coil2) the magnetic flux…

Q: An alternating current is represented as i(t) - 20 sin (100t+ ). The frequency of the current is:…

A: Please see the next step for solution:-

Q: Find du the rate at which the energy density is changing inside the solenoid at time t = 0.279 s, in…

A:

Q: A conducting ring is held a certain distance above a loop carrying a decreasing current as…

A: If the current in the bottom coil is decreasing, there will be a change in the magnetic field in the…

Q: What transformer brings the pd back to safe usable levels at the consumers end?

A: To determine,What transformer brings the pd back to safe usable levels at the consumers end.

Q: What is the rate at which the current though a 0.30-H coil is changing if an emf of 0.12 V isinduced…

A: We know that emf  ϵ=-LdIdt dIdt=ϵL

Q: Two coils as shown in the Figure below, then at t=0 and switch S is closed, which of the following…

A: please see the next step for solution

Q: Explain why a transformer works for AC currents but not for DC currents

A: transformer work only on ac supply because A transformer needs an alternating current that will…

Q: A wire along the z-axis (horizontal) with current I going in the positive z-direction produces the…

A: We know that the induced e.m.f e= -(rate of change of flux) Flux = B.A Where B is magnetic field and…

Q: For the transformer shown in Figure Q3(a), determine the following: i. The turns ratio of the…

A:

Q: A Transformer has an inpud voltage 12o.k(ims)ac The desire outage voltge is li36xl0v (Ems). frimary…

A:

Q: Since inductors can be used as energy storage elements, how much inductance is needed to power up a…

A:

Q: Calculate the peak voltage of a generator that rotates its 200 urn, 0.100 m coil at 3600 rpm in a…

A: We are given the number of turns in the coil (N), the radius of the coil (r), the speed of rotation…

Q: QUESTION 6 A transformer with primary 928 windings and 6,380 secondary windings has an input voltage…

A:

Q: Calculate L for the coil if the induced emf is measured to be 2 V for a call with 50 closed turns…

A: Given data: Induced emf =2VNumber of coil,N=50I1=0I2=5At=0.1 s

Q: A transformer with more primary turns than secondary turns will produce a secondary voltage higher…

A:

Q: Show that Im where I is the root mean square value of alternating current and I, the peak value.

A:

Q: If a 0.6T bar magnet is pushed through a 50 turn coli with an area of 0.003m2 in 1.9sec. The induced…

A: The expression for the induced voltage(e) can be given as, e = Nϕt, where N is the number of turns…

Q: Figure 3 shows a transformers consists of soft-iron core, coils X and Y. When a 240 V power supply…

A: Let he number of turns in coils X and Y be N1 and N2. Similarly, the voltage and currents be V1 and…

Q: What is Electromagnetic Induction (EMI)? Differentiate a transformer with a generator

A: To determine,What is Electromagnetic Induction (EMI) and Differentiate a transformer with a…

Q: 220 V is supplied across 1200 windings of the primary coil of the autotransformer. If 1650 windings…

A: Given             Number of turns in primary coil is   Np=1650            Number of turns in…

Q: Correct expression for induced emf according to Lenz's law is e =- At a. b. e=- At C. e=-NA At

A:

Q: A model train transformer plugs into 120V ac and draws .75Awhile supplying 15A to the train. a) What…

A: Given: Voltage is 120 V Input Current is 0.75 A Output current is 15 A

Q: 6. A pair of adjacent coils has a mutual inductance of 1.5 H. If the current in one coil changes…

A: Given value--- mutual inductance of 1.5 H. current in one coil changes from 0 to 20 A is 0.5 s, We…

Q: A coil has a self inductance of 10 Henry. If the current through the coil changes at a rate of 5…

A: Self inductance (L) =10 henry Current through coil changes at a rate of 5 Amps per second Emf will…

Q: Generators naturally produce DC Voltage and Coil AC Voltage and Magnet AC Voltage and Coil DC…

A: An electric generator works on the principle of electromagnetic induction.

Q: List down 3 ways in increasing the EMF of induced coil.

A: EMF is directly related to magnetic flux through the coil so if we increase magnetic flux  per unit…

Q: Problem 5: A loop is placed near a current carrying wire as shown in the figure. > A Which of the…

A:

Q: . Sketch a graph of current value against time for two complete cycles of an alternating current of…

A: