1. An ideal transformer has a primary with 25 turns and secondary with 15 turns. The...

1. An ideal transformer has a primary with 25 turns and secondary with 15 turns. The load resistor is 24 ? and the source voltage is 85 Vrms.What is the rms electric potential across the 24 ? load resistor?

Answer in units of Vrms

2. A transformer consists of two coils of wire wound on a common toroidal iron core. The mutual inductance of the pair is 483 mH and the current in the first coil decreases from 29 A to 0 in 2.9 s.

What is the induced emf in the second coil? Answer in units of V.

3.If the outer coil has 14.7 turns, a radius of 19 cm and length of 7.47 cm and the inner coil has 628 turns, a radius of 7 cm, and a length of 33.3 cm, find the mutual inductance of the circular coil and solenoid.

Answer in units of ?H

4. Now the current in the solenoid is increased linearly at a rate of di/dt = a =20.2 A/s.

What is the magnitude of the voltage E across the circular coil?

Answer in units of ?V.

Solutions

Expert Solution

V1/V2 = N1 / N2

so V2 = 85*15/25 = 51

so voltage across 24 ohms = 51 V rms

Answer in units of Vrms

2. A transformer consists of two coils of wire wound on a common toroidal iron core. The mutual inductance of the pair is 483 mH and the current in the first coil decreases from 29 A to 0 in 2.9 s.

What is the induced emf in the second coil?

V = M* di / dt = 483*0.001 8 ( 29-0) / 2.9 = 4.83 volts

Answer in units of V.

The mutual inductance = Uo*A1*ns*Nc = (note convert ns to turns per meter)

Uo*pi*0.07^2*628*100/33.3 *14.7 = 536.276579724 micro henry

Answer in units of ?H

4. Now the current in the solenoid is increased linearly at a rate of di/dt = a =20.2 A/s.

What is the magnitude of the voltage E across the circular coil?

E = M* di/dt = 536.276579724 * 0.000001 * 20.2 = 10832.7869104248 micro volts

Answer in units of ?V.

genius_generous answered 6 months ago

Next > < Previous

Related Solutions

An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12...

An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12 V ac is connected to the primary. Find: a. The voltage ac available at the secondary. b. Current in the 10 ohms device connected to the secondary. c. Power supplied to the primary. d. Power supplied to the secondary.

Exercises 1. A 25 kVA single-phase transformer has the primary and secondary number of turns of...

Exercises 1. A 25 kVA single-phase transformer has the primary and secondary number of turns of 200 and 400, respectively. The transformer is connected to a 220 V, 50 Hz source. Calculate the (i) turns ratio, and (ii) mutual flux in the core. 2. A 25 kVA, 2200/220 V, 50 Hz single-phase transformer’s low voltage side is short-circuited and the test data recorded from the high voltage side are P=150 W, I1 = 5A and V1 = 40 V. Determine...

current transformer with a bar primary has 250 turns in it secondary winding. the resistance and...

current transformer with a bar primary has 250 turns in it secondary winding. the resistance and reactance of the secondary circuit are 1.4 ohms and 1.1 ohms respectively including the transformer winding. when 5A current flows in the secondary winding, the magnetism mmf is 80 AT and iron lost is 1.1w. determine the following (i) ratio error (ii) phase angle error

A plug-in transformer supplies 9.00 V to a video game system. How many turns are in its secondary coil if its input voltage is 120 V and the primary coil has 381 turns?

(A) A plug-in transformer supplies 9.00 V to a video game system. How many turns are in its secondary coil if its input voltage is 120 V and the primary coil has 381 turns? What is its input current when its output is 1.33 A? (B)What is the characteristic time constant of a 24.2 mH inductor that has a resistance of 4.08 Ω? If it is connected to a 12.0 V battery, what is the current after 12.5 ms? (C)Two...

The secondary of a 500kVA, 4400/500 V, 50Hz, single-phase transformer has 500 turns. A) determine emf...

The secondary of a 500kVA, 4400/500 V, 50Hz, single-phase transformer has 500 turns. A) determine emf per unit. B) primary turns. C) secondary full load current D) maximum flux E) gross cross-sectional area of the core for flux density of 1.2 tesla F) if the core is square cross-section find the width of the limb

You build a transformer with 100 turns of wire on side 1, and 500 turns on...

You build a transformer with 100 turns of wire on side 1, and 500 turns on side 2. A) If you put a voltage of 100 V (AC) on side 1, what voltage would you get on side 2? B) If you put a voltage of 100 V (AC) on side 1 with a current of 1 Amp (AC), what current would you get on side 2? C) If you put 100 V of DC voltage on side 1, what...

_____ 25) How is a secondary immune response different from a primary immune response? A) it...

_____ 25) How is a secondary immune response different from a primary immune response? A) it is faster and more effective B) it is slower, but more effective C) it is faster, but less effective D) it is slower, and less effective E) there is no difference _____ 19) Which of the following is not a function of antibodies? A) opsonization B) activating complement proteins C) activating T-helper cells D) enhancing phagocytosis E) neutralization _____ 13) The complement system involves...

A transformer is plugged into a regular U.S. Wall outlet. There are 200 turns in the...

A transformer is plugged into a regular U.S. Wall outlet. There are 200 turns in the primary coil, and 4000 turns in the secondary coil. A) What is the rms voltage and peak voltage on the secondary coil? (two answers) B) An electrical worker accidently grabs one of the loops of the secondary coil with a single bare hand. Her other hand is in midair, and both of his shoes are firmly on the ground. The resistance in her body...

Why is there a greater hazard working on live secondary close to a transformer than farther...

Why is there a greater hazard working on live secondary close to a transformer than farther away?

Differentiate between the primary and secondary memory?

Differentiate between primary and secondary memory. Give two examples of each .

Subjects