A transformer has 472 turns on its primary and 108 turns on its secondary. (a) Is this a step-up or a step-down transformer?   (b) If a voltage of 103 V is applied to the primary and a current of 0.4 A flows in these windings, what are the voltage output of the secondary and the current in the secondary?

Q: You are told that the primary coil in a transformer has a power of 100 Watts. The secondary coil is…

A:

Q: The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket…

A: The potential of the batteries is VB=9.0 V The current in the batteries is IB=249 mA The potential…

Q: The power adapters of devices we use contain transformers. In one such adapter, the input to the…

A:

Q: Why won't a transformer work with a DC input voltage? Select one: a. DC input voltage does not…

A: The phenomenon behind the working of transformer is the mutual induction. It is the phenomenon in…

Q: A transformer steps 300 V down to 7.5 V to operate an arc welder that uses a current of 190 A. The…

A: A transformer is a passive device which uses electromagnetic induction to transfer energy from one…

Q: A transformer has a primary voltage of Vp= 600 V and primary current of Ip= 2.5 A. If the measured…

A:

Q: A step-down transformer produces a voltage of 6.0 V across thesecondary coil when the voltage across…

A: Given data The initial voltage across the secondary coil of a step-down transformer is: VS_1 = 6 V…

Q: A step-up transformer is designed so that the output of its secondary winding is 240 V when the…

A:

Q: A transformer has 512 turns on its primary and 116 turns on its secondary. (a) Is this a step-up or…

A: A transformer that increases the voltage from primary to secondary (more secondary winding turns…

Q: A 125 kVA transformer having primary voltage of 2000 V at 50 Hz has 182 primary and 40 secondary…

A:

Q: V= ? 17,000 V 21. From the energy conservation point of view, the input power of the first…

A:

Q: A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage…

A: GIVEN : Vold=335 kVVnew=750 kV (a) Ratio of no. of turns in secondary coil : Ns,newNs,old=VnewVold…

Q: An American traveler in China carries a transformer to convert China's standard 220 V to 120 V so…

A:

Q: A transformer has 1000 turns in the primary coil and 100 turns in the secondary coil. If the primary…

A:

Q: A transformer has 900 turns on its secondary and 100 turns on its primary. The primary is connected…

A: (a) The voltage output of the secondary coil is VS=NSNPVP=90010014 V=126 V Therefore, the output…

Q: What is the type of core material of the transformer?  a. Silicon steel b. Iron c. Copper d.…

A:

Q: A transformer has a turn ratio of NP/NS = 2/7. The transformer is connected to a 120-V line. (a)…

A:

Q: A transformer has 500 primary turns and 10 secondary turns. (a) If Vp is 120 V (rms), what is Vs…

A:

Q: The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket…

A: Vs = 9 V Is = 252 mA = 0.252 A Vp = 120 V

Q: A 75-turn, 10.0 cm diameter coil rotates at an angular velocity of 8.00 rad/s in a 1.25 T field,…

A: a. peak emf is

Q: The primary coil of an ideal transformer is connected to a 120 V source and draws 1.0 A. The…

A:

Q: The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket…

A:

Q: (a)The primary of a step-up transformer connected to a 120 V source has 200 turns.  If the output is…

A:

Q: A transmission line that has a resistance per unit length of 4.00 x 10-4 a /m is to be used to…

A: ρ=4×10-4 ΩmP=5×106 WL=6.44×105 mV=4.5×103 VV'=550×103 V

Q: A transformer has a current with a voltage of 25000 V enter it passing through 12500 turns of wire.…

A:

Q: A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage…

A: We know that in a transformer:Transformation ratio r=VoutVin=NSNP ≡Voltage outVoltage in=Turns on…

Q: A transformer with 1500 turns in the primary and300 turns in the secondary is used to réduce the…

A: number of turns in primary coil = N1= 1500 number of turns in secondary coil = N2= 300 voltage in…

Q: A step-down transformer has 66 turns in its primary coil and 13 turns in its secondary coil. The…

A:

Q: A bicycle generator rotates at 1875 rad/s, producing an 18.0 V peak emf. It has a 1.00 by 3.00 cm…

A:

Q: 11 Vin Np = 300 Ns = 900 Vout An ideal transformer consists of Np = 300 primary turns and Ng = 900…

A: ALTERNATING CURRENT

Q: A student needs to reduce the percent power loss by 100 times by using a transformer. What would the…

A: Power loss (Ploss) = I2R ...... (1) Here, I is the current and R is resistance As I = P/V .......…

Q: An 18-kV neon sign is connected to a transformer and plugged into a conventional outlet (U.S.). If…

A: given: input voltage (V1)=18kV conventional output(V2)=120V turns in primary coil (N1)=300 Turns in…

Q: A transformer has 600 turns on its secondary and 100 turns on its primary. The primary is connected…

A: Given A transformer has 600 turns on its secondary and 100 turns on its primary. The primary is…

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

A:

Q: In a well-designed transformer with an iron core, the secondary coil has twice as many turns as the…

A: The secondary coil has twice as many turns as primary coil in a well designed transformer.

Q: Q5: A power transmission line feeds input power at 2300 V to a step-down transformer with its…

A:

Q: A transformer has a primary voltage of V,= 400 V and primary current of 1,= 1.5 A. If the measured…

A: The input power here is The output power here is

Q: A transmission line that has a resistance per unit length of 4.30 x 104 n /m is to be used to…

A:

Q: A disk drive plugged into a 120-V outlet operates on a voltage of 9.0 V. The transformer that powers…

A: Given The number of primary coil is Np=125 turns. The voltage in secondary coil is Vs=9 V. The…

Q: In the high-voltage circuit of the X-ray generator, a transformer is used to supply a 50000 V to…

A: We know, for transformer the folwing relation holds: VpVs = IsIp = NpNsVp = primary voltage = 150VVs…

Q: You have a transformer with a primary current of 34A and a primary voltage of 1960V. The current in…

A: Primary current (Ip) = 34 A Primary voltage (Vp) = 1960 volts Secondary current (Is) = 143 A

Voltage Across Inductor

An actor is a passive electrical component that consists of a coil bent in the form of wire which uses electromagnetism to produce electric current through the coil. When the electric current flows through a conductor that is the coil, a magnetic flux is developed around the conductor. This flow of current through the coil creates a magnetic field based on Fleming's Right-hand thumb rule. If there is any decrease in the current passing through the inductor, then the magnetic field will also decrease and energy is released through the generation of electric current. There is also a secondary voltage inducing in the same coil due to the magnetic flux, since it opposes any changes in the electric current flowing through the circuit. An inductor is also called choke, coil, or solenoid. A choke is designed to block certain frequencies when the DC current passes. A winding coil is coated with insulation to give extra insulation and protect the circuit. They are usually tightly wrapped around a central core which is cylindrical in nature so that the magnetic flux can be induced. The solenoid is a three-dimension coil that is used to exhibit electromagnetism when the magnetic field is developed due to the current flowing through the coil. The sign convention of the inductor is the same as the power dissipating device. When the current flows into the positive side of the voltage across the inductor, the value is positive and the inductor dissipates power whereas when the inductor releases the power back to the circuit, the current has a negative sign convention.