Question

-dB-(Hol dx Extra Credit 1.) Which equation from A-E on left should be used to find out the B field inside an ideal solenoid 4T r2 B. Jclosed loop Extra Credit 2.) Which equation from A-E on left should be used to find out the B field due to a current carrying circular curve at its center dt Extra Credit 3.) Which equation from A-E on left should be used to find the induced E feld around the solenoid carrying a time-dependent current? D. Closed toop Extra Credit 4.) The Amperian loop use for finding the B field inside an ideal solenoid is A circle inside the solenoid. A. B. A circle outside the solenoid A rectangle An Amperian loop is not used. C. D. Extra Credit 5.) An ideal solenoid of radius R has n turns of wire per unit length and carries a time-varying current. When the current is in the direction show below, the B field direction in the solenoid is A. Upward B. Downward. C. Leftward D. Rightward. E.CCW mas CO Extra Credit 6.) What is NOT correct about the induced E field around a solenoid? A. If the current is steady, there is no induced E field B. If the current is changing, there is induced E field everywhere. C. There is no induced E field outside the solenoid. D. When the current is changing, the B field inside the solenoid is changing, hence the flux is changing, and there is induced E field inside the solenoid.

Answer 1

Eq^n B - contourintegral B rightarrow middot ds rightarrow = mu_0 I ln C using this eq^n we can find the B field inside the Equation A B rightarrow = integral dB = integral mu_0 I/4 pi d j rightarrow times r/r^2 Equation d contourintgral closed E rightarrow middot d s rightarrow = -d phivariant_B /dt we can use a circle the solenoid as an Amperian loop for finding the B field. \r\n using Right rule, the direction of B - field will be in Leftward. C - There is no induced E field outside the solenoid.