33. Two point charges +10nC and —30nC are 1m apart. (i) Find the electric potential at a point between them which is at a distance of 0.8 m from the —30nC charge. (ii) find the point between the charges where potential due to them is zero. 

34. Two cells of emf 4 V and 3 V having internal resistance of 3 ohm and 1 ohm respectively are connected in parallel so as to send a current through an external resistance of 5 ohm in the same direction. Find the current through the cells and the current through the external resistance. 

35. A coil having an inductance of 200 mH and resistance 10 ohm is connected to a 220 V, 50 Hz ac supply. Calculate the (a) impedance of the circuit and (b) the current in the circuit. 

36. Find the angle of minimum deviation produced by an equilateral prism of refractive index 1.55. Also find the angle of incidence of minimum deviation. 

37. Obtain the amount (mass) of C 27 o 60 ; ( T 1 / 2 = 5.3years) necessary to provide a radioactive source of 5.0mCI 
strength. 

Dear Student,


33.V=kqr+kq'1-r=9*109-30*10-90.8+10*10-90.2=9-37.5+50=112.5 volt .let the potrntial be zero at x from 10 nC10nCx=30nC1-x1-x=3xx=14=0.25 m Regards

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