What is the reading on the ammeter?

+2 votes

An AC power supply produces a maximum voltage ΔVmax = 104 V. This power supply is connected to a resistor R = 23.0 Ω,and the current and resistor voltage are measured with an ideal AC ammeter and voltmeter as shown in the figure below. An ideal ammeter has zero resistance, and an ideal voltmeter has infinite resistance.

image
(a) What is the reading on the ammeter?
 A

(b) What is the reading on the voltmeter?
 V
asked Mar 19, 2012 in Physics by Gummmys ~Expert~ (1,105 points)
    

1 Answer

+4 votes
 
Best answer

Part A:

Using Ohm's Law, current is:

I = V / R    (*where I =current, V=rms voltage, R=resistance)

rms voltage is calculated in Part B.

 

Part B:

Vrms = Vmax / 2

use Vrms to solve part A.

answered Mar 23, 2012 by kirby ~Expert~ (3,020 points)
selected Mar 24, 2012 by Gummmys

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