Veltmeter D Voltmcter Bane Four voltmeters are connected to a circuit as shown i

Question

Veltmeter D Voltmcter Bane Four voltmeters are connected to a circuit as shown in the dagram. As is ususal with voltmeters, the reading on the voltmeter is f the negative lead (black wire, usualy labeled cOM) is connected to a location at lower potential, and the positive lead (red) is connected to a location at higher potential. material. At a particular moment, the readings observed on the The circuit contains two devices whose identity is unknown, and a rod of length d s cm made of a voltmeters are: Voltmeter A: -1.9 volts Voltmeter B:-3 volts Voltmeter Ct -2.5 volts At this moment, what is the reading on Voltmeter D, both magnitude and sign? Av 36 what is the magnitude of the electric field inside the bar? what is the direction of the electric field inside the bar? -Select- x volts v/m

Explanation / Answer

a) -1.9-3-2.5+v = 0

total voltage in a loop is zero

v = 7.4 V

b) E = v/d = 7.4/8*10^-2 = 92.5 V/m

c) to the right.

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