2007-02-15 17:01:19 · 6 answers · asked by Lasaire 1 in Science & Mathematics ➔ Physics
also: if an ammeter receives the same current as a resistor, explain how the resistors in the ammeter limit the current through the moving coil
2007-02-15 17:19:17 · update #1
The different ranges are made by changing the resistors connected in series and parallel with the meter.
2007-02-15 17:14:11 · answer #1 · answered by rscanner 6 · 0⤊ 0⤋
The ammeter, being in series with the current, must split the current so that the coil does not get vaporized. This is done with a shunt resistor across the coil. For example, a shunt resistor 1/9th the value of the coil resistance will allow the ammeter to read currents up to 10x the maximum current in the coil.
2007-02-15 17:49:29 · answer #2 · answered by arbiter007 6 · 0⤊ 0⤋
By the same token, the range of a voltmeter can be changed by connecting a resistor in series with it. If the resistance of this resistor is equal to that of the voltmeter then the range is doubled.
2007-02-15 19:01:48 · answer #3 · answered by rethinker 5 · 0⤊ 0⤋
you omit some information. Are both bulbs linked in parallel throughout the battery? i am going to assume so. Key means change? i am going to assume so. large question is what does the 60 watts advise? Does it advise the bulbs use up 60 watts at the same time as linked to the ten volt (5x2) battery? the different assumption means the problem can not be solved. Use P = E*I on each and each and every bulb 60 = 10*I I = 6 amps. modern through each and every bulb is 6 amps, for 12 amps entire. Voltage throughout the bulbs is 10 volts. .
2016-12-04 06:02:13 · answer #4 · answered by Anonymous · 0⤊ 0⤋
They aren't different ranges, they're measuring totally different things. Current (amperage) is *not* the same as voltage.
HTH ☺
Doug
2007-02-15 17:05:33 · answer #5 · answered by doug_donaghue 7 · 0⤊ 0⤋
how come when i step on a scale i get something different than when I measure how tall i am?
2007-02-15 17:07:13 · answer #6 · answered by Anonymous · 0⤊ 0⤋