A transformer has 20 turns of wire in its primary coil and 80 turns on its secondary coil. (a) Is this a step-up or step-down transformer? step-up or step-down     (b) If an alternating voltage with an effective voltage of 140.0 V is applied to the primary, what is the effective voltage induced in the secondary?  V?

Q: A transformer has 100 turns in its primary coil and 2000 turns in its secondary coil. The emf in the…

A:

Q: A transformer consists of a 500-turn primary coil and a 2000-turnsecondary coil. If the current in…

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 335-kV ac electricity from a power transmission line is fed into the primary winding of a…

A:

Q: A step-down transformer (turns ratio =1:8) is used with an electric train to reduce the voltage from…

A:

Q: A generator supplies (2.460x10^2) V to the primary coil of a transformer. The primary has 50 turns…

A: Given data :  Voltage in primary coil Vp = 2.460 × 102 V  Number of turns in primary coil Np = 50…

Q: A transformer has 60 turns in the primary and 1935 turns in its secondary. The voltage across the…

A:

Q: What is the voltage output (in V) of a transformer used for rechargeable flashlight batteries, if…

A:

Q: 1) A voltage is varied in a primary solenoid with 2900 +/- 100 turns of coil. The length of the…

A:

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

A:

Q: Question 8 900 turns 2200 400 2 500 Ω turns 3.3 k2 Calculate all voltages and all currents in this…

A: Given data: The primary turns is Np=900. The secondary turns is Ns=2200. The voltage drop across…

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

A:

Q: Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once converted…

A: The equation for the current in terms of power and voltage is,

Q: A step-up transformer has Np = 46 turns on the primary coil and Ns = 669 turns on the secondary…

A:

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

A: Given that primary and secondary voltages and secondary current in the transformers Vs = 9 V Is =…

Q: transformer is used to step down 160 V from a wall socket to 9.3 V for a radio. (a) If the primary…

A:

Q: If two coils placed next to one another have a mutual inductance of 5.00 mH, what voltage is induced…

A: Mutual inductance, M = 5 mH  change in current, dI =2 A  change in time, dt = 30 ms

Q: Problem 8: Suppose a large power plant generates electricity at 12.0 kV. Its old transformer once…

A: Part (a)Find the relation between current, power and voltage.

Q: Two coils are placed close together in a physics lab to demonstrate Faraday’s law of induction. A…

A: Change on current, dI =5 A time, t =1 ms  emf = 9 V

Q: A scale train transformer is plugged into 120 V ac and draws 0.35 A while supplying 7.5 A to the…

A:

Q: The sketch represents an ideal transformer. What is the current in the secondary if the primary side…

A: This is a step up transformer. NpNs=VpVsCalculate the voltage generated across the secondary…

Q: How fast (in rad/s) must a 92-turn coil spin in a 0.039 T field to create a peak voltage of 8.3 V?…

A: Given number of turns = N = 92 strength of magnetic field = B = 0.039 T peak voltage = Vmax = 8.3 V…

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: Suppose a generator has a peak voltage of 302 V, and its coil with 500 turns and a diameter of 5.48…

A:

Q: A step-down transformer has 600 V across the primary coil and 120 V across the secondary. The…

A:

Q: The input coil of a transformer has 10 windings. The output coil has 40 windings. If an AC current…

A:

Q: Question 1: A step-up transformer has 2 turns in primary coil and 10 turns in the secondary coil. A…

A: Solution:1) given:Primary coil turns Np=2secondary  coil turns Ns=10primary coil voltage Vp=5V

Q: A transformer is to be designed to increase the 30-kV (rms) output of a generator to the…

A: Input voltage, V1 = 30 kVOutput voltage, V2 = 345 kVNumber of turns in primary coil, N1 = 80 Number…

Q: An electronic device needs 9V AC to operate. Its transformer is plugged into a 120V AC source (power…

A: Given data,  Np = 600 turns Vs = 9 V Vp = 120 V

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

A: Given: The number of turns in primary coil is N1=100 The number of turns in secondary coil is…

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

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

A:

Q: A step down transformer produces produces a voltage of 6 volts across the sec- ondary coil when the…

A: voltage in primary, Vp = 120 V  voltage in secondary, Vs = 6 V

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

A:

Q: How many turns of the coil are required in order to produce 2 V of induced voltage at the rate of 5…

A: Given data: Induced voltage is, ε=2 V. Rate of change of magnetic flux is, dϕdt=5 wb/s.

Q: If two coils placed next to one another have a mutual inductance of 7.50 mH, what voltage (in V) is…

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 transformer has a primary coil with 360_turns and a secondary coil with 5600_turns. If the voltage…

A: