2021 22 Home Time Running Hide Time Attempt Due 9 May At 19 00 18 Minutes 37 Seconds 1 Pts Question 5 Modules Announc 1 (93.71 KiB) Viewed 30 times
2021/22 Home Time running: Hide Time Attempt due: 9 May at 19:00 18 minutes, 37 Seconds 1 pts Question 5 Modules Announcements Think about a coaxial cable. The radius of the outer conductor is b. The radius of the inner radius is a. There is a dielectric material in between. The dielectric constant is e_r. Assignments Discussions Let's keep the outer conductor radius b fixed. Grades Which statement is incorrect? People Quizzes Panopto Zoom O Increasing the radius 'a' will increase the capacitance. O Increasing e_r will increase capacitance. Increasing the radius 'a' will increase the inductance. O Increasing e_r will not affect inductance. -ad Next < Previous bill
Which of the following statements about magnetic field is WRONG? Moving charges always experience magnetic forces. The magnetic force is always perpendicular to the applied magnetic flux density. Different from electric filed lines, magnetic field lines always form closed loops. The magnetic field strength H has a unit of A/m.
An inductor is formed by winding N turns of a thin conducting wire into a circular loop of radius a. The inductor loop is located in the xy plane with its centre at the origin. It is connected to a resistor R. A magnetic field, B = BO*cos(wt), passes through the inductor. w is the angular frequency and tis time. Its direction is 45 deg from the xy plane. What is the induced current going through the resistor? Assume the wire resistance is negligible. O V2N Bowa? cos(wt) R O VZN Bowa? sin(wt) 2R V2Bpa sin(at) 2R Bowa sin(at) 2R
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