She suggests that he modify an old transformer that they don't need anymore to do the job. The old transformer has a primary coil of 319 turns. It will need to be connected to mains voltage (240 V) and put out a voltage of 12 V to charge the car battery. How many turns should Spike wind to make the secondary coil? (No units)

Q: If you are planning to make an idea charger (step down transformer) with an  output of 5.0V when it…

A: The required expression for the required ratio of output to input turns of coils is,

Q: Why does an iron core that extends inside and connects the primary and secondary coils intensify…

A: Magnetic materials are classified into different types based on their behavior in the external…

Q: What happens in the secondary coil of a transformer?

A: secondary coil

Q: Describe the mechanism for the occurrence of losses in transformer cores and how to reduce them?

A:

Q: A transformer is to be used to step up voltage from an alternating current source from 120 V to 1800…

A: Given data The primary alternating voltage source is V1 = 120 V. The secondary alternating voltage…

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: A transformer has 400 turns on its secondary and 100 turns on its primary. the primary is connected…

A:

Q: A 105-turn square wire coil of area 0.040 m2 rotates about a vertical axis at 1,800 rev/min, as…

A: GIVEN,  area= 0.040 m^2 ω=1800 revmin*1min 60 sec×2π rad1 rev=188.5 red/sec   B=2.0 ✕ 10−5 T N=105

Q: A transformer has a turns ratio of 2.5:1 the primary voltage is 208V what is the voltage of the…

A:

Q: A transformer has 150 turns in the primary col and 333 tums in the secondary col. If the primary…

A:

Q: Which of the following can a transformer accomplish?(a) Changing voltage but not current.(b)…

A: Transformer

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: In a non-ideal transformer, provide a physical explanation as to why the current in the primary coil…

A: consider the transformer arrangement as shown

Q: Consider a transformer, used to recharge rechargeable flashlight batteries, that has 500 turns in…

A:

Q: Please design a transformer based charger works with 230V input and 5V output with N amp current.…

A:

Q: How a step down transformer works?

A: A transformer is a device which can converts the high voltages into the low voltages.

Q: In a step down transformer, how does the input current compare with the output current?

A: In a step down transformer, the output current is higher than the input current. Because the number…

Q: What is the back emf of a 120 V motor that draws 8.00 A at its normal speed and 20.0 A when first…

A:

Q: The power in the secondary of a transformer is 1800 W. Transformer has a primary coil with 110 turns…

A: Power in the secondary coil of transformer = 1800 W  Number of turns in secondary coil = 200 Number…

Q: oltage of 120 volts and a secondary voltage of 18 volts. The primary excitation current is 0.25 amp.…

A: Given;- A transformer has a primary voltage of Vprimary =  120 volts  A secondary voltage of…

Q: Consider a transformer consisting of a primary coil with 498 turns, a secondary coil with 117 turns,…

A:

Q: An ideal transformer steps down a voltage of 240V to supply power to a lamp with a power rating 3V,…

A:

Q: What is an isolation transformer  and how it works?

A: Isolation transformers are transformers used to transfer electric power from alternating power…

Q: calculate the peak voltage (in v) of a generator that rotates its 225 turn, 0.100 m diameter coil at…

A:

Q: In a transformer energy passes from the primary to the secondary 1.by the magnetic flux 2.through…

A: In a transformer , energy passes from primary to secondary ___

Q: Why is it important that the core of a transformer pass through both coils?

A: A transformer is a device which is used to convert the high voltages into low and vice versa for ac…

Q: he simple, though impractical, way to generate electrical power is shown below. A bar of metal th…

A: Given data: The magnetic field around the bar, B= 0.75T The velocity of the bar, v=0.4m/s The length…

Q: Why is the iron core of a transformer made laminated instead of being in one solid piece?

A: In an actual transformer, small energy losses occur and the efficiency gets reduce. The laminated…

Q: Name two kinds of energy losses in a transformer. How are they minimized?

A: The two types of major losses in transformers are:Eddy currents.Hysteresis loss.

Q: Calculate the peak voltage (in V) of a generator that rotates its 220 turn, 0.100 m diameter coil at…

A:

Q: Why can a hum usually be heard when a transformer is operating?

A: A transformer is a device which is used to convert high to low and low to high ac voltages.

Q: n the transformer experiment performed in the lab, following coils were used to form a step up…

A:

Q: A transformer has 450 turns in the primary coil, which provides 1270 V at 8.9 A.   If the secondary…

A:

Q: The primary coil of a step-up transformer draws 40 W. Find the power provided by the secondary coil.…

A: The power in secondary We know that,For ideal transformer Power in secondary = power in primary…

Q: A transformer has a coil of 1000 turns wound on its central core and the terminals of the coil are…

A: Number of turns on primary coil (n) = 1000Number of turns on secondary coil (N) = 50Input supply…

Q: QUESTION 7 The primary of a transformer has 120 turns, while the secondary of the same transformer…

A:

Q: Why does a motor also tend to act as a generator?

A:

Q: A transformer has a primary coil with 100 turns and secondary coil with 250 turns. The input voltage…

A: Given: Number of primary coil Np = 100 Number of secondary coil, Ns = 250 Input voltage, Vin = 150 V…

Q: Please design a transformer based charger works with 230V input and 5V output with N amp current.…

A: Input Voltage: Vinp = 230 V Output Voltage: Vout = 5V Number of turrns in primary coil: Np = 6…

Q: The input voltage of a transformer is 4 V. The primary coil has 50 loops and the secondary has 25…

A:

Q: A transformer is comprised on 121.92turns on the primary and 35.82 turns on the secondary.  If the…

A: ...

Q: The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air…

A: Given:Coil ratio,NsNp=431Primary voltage=120 Vsecondary coil current, is=1.6×10-3 A

Q: Which of the following are true? Select all that apply. When more wraps are added to a primary coil…

A: Transformers works on the principle of mutual induction.

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.