Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

An ideal transformer has N1 windings in the primary and N2windings in its secondary. If you double only the number of secondary windings, by what factor does (a) the voltage amplitude in the secondary change, and (b) the effective resistance of the secondary circuit change?

Short Answer

Expert verified

(a)The voltage amplitude in the secondary coil is doubled.

(b) The resistance increases four times.

Step by step solution

01

Step-1: Formulas used  

Terminal voltage across the primary and the secondary coils are related to the number of turns by the equation

N2N1=V2V1

Also for a transformer,

I1=V1(N2N1)2R

02

Step-2: Calculations for secondary voltage

As shown by the equation in step 1, the voltage amplitude is directly proportional to the number of turns. So, when the number of turns is doubled, the voltage amplitude in the secondary coil is also doubled.

03

Step-3: Calculations for resistance

From the given equation in step-1

R2R1=N2N12.

So, on doubling the number of turns, the resistance increases four times.

Hence, (a)The voltage amplitude in the secondary coil is doubled.

(b) The resistance increases four times.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

In the circuit, in Fig. E26.47 the capacitors are initially uncharged, the battery has no internal resistance, and the ammeter is idealized. Find the ammeter reading (a) just after the switch S is closed and (b) after S has been closed for a very long time.

Could an accelerator be built in which all the forces on the particles, for steering and for increasing speed, are magnetic forces? Why or why not?

An electron at point in figure has a speed v0=1.41ร—106m/s. Find (a) the magnetic field that will cause the electron to follow the semicircular path from to and (b) The time required for the electron to move fromAtoB.

BIO The average bulk resistivity of the human body (apart from surface resistance of the skin) is about 5.0ฮฉยทm. The conducting path between the hands can be represented approximately as a cylinder 1.6 m long and 0.10 m in diameter. The skin resistance can be made negligible bysoaking the hands in salt water. (a) What is the resistance between the hands if the skin resistance is negligible? (b) What potential difference between thehands is needed for a lethal shock current of 100 mA ? (Note that your result shows that small potential differences produce dangerous currents when the skin is damp.) (c) With the current in part (b),what power is dissipated in the body?

An electron moves at 1.40ร—106m/sthrough a regionin which there is a magnetic field of unspecified direction and magnitude 7.40ร—10-2T. (a) What are the largest and smallest possible magnitudes of the acceleration of the electron due to the magnetic field? (b) If the actual acceleration of the electron is one-fourth of the largest magnitude in part (a), what is the angle
between the electron velocity and the magnetic field?

See all solutions

Recommended explanations on Physics Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free