1.

For a given circuit, L =6 mH, R=0, C =20 nF, and E =0. Find the equation relating the charge and the time if q = 10* C and i =0 when t= 0. Choose the correct equation below. O A. q= cos 91,287t O B. q= 100,000 sin 91,287t O C. q = 100,000 cos 0.0913t O D. q= 100,000 cos 91,287tIf the current in an RL circuit with a voltage source E is zero when t= 0, show that lim i= B. See the figure on the right. R 1+00 Using the given information, the differential equation for this problem is L- + Ri= E. Solve this equation for i. Choose the correct answer below. di O A. i- R (1 -e- (8): ) OB. 1= 1 - e ( R) ! ) Or c. i= El1- -(8 ).) OD. i= - J| m Show that lim i= E R Choose the correct answer below. 1-+00 O A. Since i= (1- -(2).). tim G-. (2).]- because as t approaches co, the exponential term becomes negligible very quickly. O B. Since i= ( 1-e-(2) 1) lim J m because as t approaches co, the constant term becomes negligible very quickly. 1-+ 00 O C. Since i= lim because as t approaches co, the exponential term goes to infinity very quickly. 1-+00