A circular metallic disc is placed with its plane perpendicular to a uniform magnetic field of flux density B. The disc has a radius of 0.2 m and is rotated at 5 revolutions per second about an axis through its center perpendicular to its plane. The e.m.f between the center and the rim of the disc is balanced by the potential difference across a 10 Q resistor when carrying a current of 1 mA. Calculate the magnitude of the magnetic field strength. Provide your answer in milliteslas (mT).

A circular metallic disc is placed with its plane perpendicular to a uniform magnetic field of flux density B. The disc has a radius of 0.2 m and is rotated at 5 revolutions per second about an axis through its center perpendicular to its plane. The e.m.f between the center and the rim of the disc is balanced by the potential difference across a 10 Q resistor when carrying a current of 1 mA. Calculate the magnitude of the magnetic field strength. Provide your answer in milliteslas (mT).

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 11.3CYU: Check Your Understanding A straight, flexible length of copper wire is immersed in a magnetic field...

See similar textbooks

Similar questions

Check Your Understanding A straight, flexible length of copper wire is immersed in a magnetic field that is directed into the page, (a) If the wire's arrent runs in the +x-direction, which way will the wire bend? (b) Which way will the wire bend if the current nms in the -x-direction?
Check Your Understanding Using Example 12.1, at what distance would P have to be to measure a magnetic field half of tire given answer?
A coil of resislance 5 ehm 2 induclance 0.2H is conneded in series haith a sariabfe capacilor across 30 yolt aud 50 tfe Jubbty. At wohat iealue occe? Find the coresponding ualue of the current. of cabacilor resouance will
MYMIVIVH uns w pui SIVIN IN WEHE saw piwa ISMIMIN 29. An electron is travelling at 100 km/s parallel to a long straight horizontal conductor a distance of 3.00 cm from the conductor. A current of 12.0 A runs through the wire as the electron travels parallel to it, in the same direction as the electron's velocity. Find the strength of the external electric field that will prevent the elec- tron from deviating from its original path. Express your answer in V/m.
4Tke By how much is the approximation B ponI [or in terms of Coulomb's constant ke, B -nI] in c2 error at the center of a solenoid that is 30 cm long, has a diameter of 5 cm, is wrapped with n turns per meter, and carries a current I? Hint Compared to the exact expression, the approximation B = Honl is Select an answer v by %.
If A/m on plane z = 0, (a) Determine the current density, and (b) Verify Ampere's law by taking the circulation of H around the edge of the rectangle Show all calculation must. Don,t copy from another site or here. Answer must be correct
3.30P) Determine the B field on the axis of a circular cylinderical shell. The cylinder has a Radius b, length L, and the surface current density j = Ims@. Calculate the B in the cylinder by using Ampere's Law for very long L RO, 0, 2) Jms
A capillary tube shaped conductor (silindirik boru) with p resistivity has length d and its dimensions shown in figure. Apply a potential difference Vo is applied between to ends. Show clearly which end positive and negative. a) Show the direction of electric field, current, current density in the conductor. b) Calculate the current density J in the wire c) Calculate the magnetic field everywhere. Show and explain every step by using Ampere's Law. h 1₂
A long, straight wire carries a 13.0 A current. An electronis fired parallel to this wire with a velocity of 250 km/s in the samedirection as the current, 2.00 cm from the wire Is it necessary to include the effects of gravity? Justify your answer.
A square loop whose sides are 6.0-cm long is made with copper wire of radius 1.0 mm. If amagnetic field perpendicular to the loop is changing at a rate of 5.0 mT/s, what is the currentin the loop? this is not graded and will not be
My homework asks "Find the Ep electrical field in terms of unit vectors." rest is given in the question. Can you help with my homework? radius : 3R Find the total current through the section perpendicular to the axis.
Az 31 Define the term electric current. 3.2COmplete the following scotence by Filling in the musung words. Resistors in senies divide C3.24)..o and resistos i. paralle. divick C32.27eeo 33 caltulate the: 3.34 Effective resistcance Of the perelel comhinution of resstors of the Circut, 33270 T4l 1esistance $33 Reuchng or 3,3/ Peuclum op uH meter Vi, ammet er A2.