Unlike the idealized ammeter described in your text (section 25.4), any real ammeter has a nonzero resistance. (a) an ammeter with resistance ra is connected in series with a resistor r and a battery of emf and internal resistance r. the current measured by the ammeter is ia. find the current through the circuit if the ammeter is removed so that the battery and resistor from a complete circuit. express your answer in terms of ia, r, ra, and r. the more "ideal" the ammeter, the smaller the difference between this current and the current ia. (b) if r=4.50, e=8.25 v, and r=0.33, find the maximum value of the ammeter resistance ra so that ia is within 1.0% of the current in the circuit when the ammeter is absent. (c) explain why your answer in part (b) represents a maximum value.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.