PHS 212 Final, Spring 2001

: 7 ~ (A? Te al NDU : PHS 212 — Electricity & Magnetism Faculty of Natural and Applied Sciences Yinal Exam — Spring 2001 Department of Sciences Duration; 2 hours Instrustor: Dr, Roger Majjar mm r d width 10 mm. A 1.2 ‘A20-A current flows through a copper plate of thickness 0.52 | i e: | voltage of 3.1 pY¥ is radii are placed a large distance fromeach’ ally et a potential of +400 V and ~400 V. They are tl u and C=4i1F) are charged under a potential difference of 100¥V. ina LC cirevit as shown in the figure Find the osciltating frequency j 4, Show that two infinite 0 crs and separation Q.1 mm is filled with a -dielectric of constant 2.3 apd resistivity 10° O.m. Find the current (knowpias leakage Plates if the capacitors is carrying a charge of 0.185 C. on Ae he es e's Ke eee Pte (ea parallel plate capacitor of plate area 40 crn? ar current) between the twa R 6 ae i 6. A dielectric cylinder of radius & is carrying charge with a uniform charge density p. Find the electric field for y < KX. 1f ¥f/R)=0, Find the porential ¥/r) for r<k, - io the figure shown, a wire of length ! and resistance & slides on a U-shaped conductor of - negligible resistanze, The loop thus formed lies near a long wire that carries a current ip. Show that the current é;in the loop depends on the distance x between the long wire and the : eee Lt vi, £3 moving wire aécording to the relation i, -iet ‘ =