c) DEFINE THE DUTIES OF RB1 AND RB2 RESISTORS.

2. A bank of nickel-cadmium cells is used as the emergency lighting supply for a hospital. There are 100 cells connected in series and each has an A-hr rating of 120 A-hr. The bank has to be replaced, and the manufacturer is no longer supplying nickel-cadmium cells. It is decided to replace the cells with lead-acid cells. How many lead-acid cells will be required if each has an A-hr rating of 60 A-hr, and how should they be connected?

2. Please respond to question in attached image.  Thank you.

For the network shown in Figure B22 , assume E = 17V,Diode Di, D2 as Germanium R1=2KQ and R2=3K2. Calculate, i. Current I1, ii. Current ID2 ii. Voltage across resistor R2 R1 Di + E D2 I2 R, Figure B22