A part of the circuit is shown in the figure below, where device "A" is an ammeter and device "V" is a voltmeter. The reading of the ammeter is 5A and the voltmeter is 1000V. Determine the value of resistance R, to the nearest integer. (Note: the Voltmeter and Ammeter are just measuring the voltage and current respectively and have no impact on the circuit at all; i.e. the Ammeter behaves like a short circuit and the Voltmeter like an open circuit) 25000 O 2172 O 10412

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?

A 0 – 150 voltmeter has a resistance of 2000-ohms per volt.  It is desired to change this voltmeter to a 0 – 600 volt instrument by the edition of an external multiplier. What is the resistance, in ohms, of this external multiplier?

Please help!!!