(a) Answer the following questions: (i) Use Gauss' law to calculate the electric field at distance r from an infinitely

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A Answer The Following Questions I Use Gauss Law To Calculate The Electric Field At Distance R From An Infinitely 1 (127.1 KiB) Viewed 39 times

(a) Answer the following questions: (i) Use Gauss' law to calculate the electric field at distance r from an infinitely long line of charge with a uniform positive linear charge density 1. [10 marks] (ii) A current of 0.3 A is passed through a lamp for 2 minutes using a 6 V power supply. Calculate the energy dissipated by this lamp during these 2 minutes. [5 marks] (iii) A square loop of wire lies in the plane of the page and carries a current I as shown in Fig. 1. A uniform magnetic field parallel to the side MK causes the loop to rotate. Determine the axis and direction of rotation. Justify your answer. KIA [5 marks] -1011 --E------ N Fig. 1 (iv) An electron with charge e = -1.6 x 10-19 C is moving with speed 3.105 m/s in the positive x direction. A magnetic field of 0.8 T is in the positive z direction. Find the magnitude and direction of the magnetic force on the electron.