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need a detailed answer..Find the READING in Voltmeter if current flowing is 4A. Those who don't know it, STAY AWAY.... |
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Answer» ohm's law to solve this problem. Since the incoming current is 4A, we say I=4A. The VOLTMETER READS a voltage drop of 20V across the resistor. This means that if we apply ohm's law on the resistor, we can say that V=I*R. Therefore, 20=4*R. This gives US that value of R to be 5 ohms.This was the theoretical IDEAL case. Now, with NON ideal meters, in the real world temperature increases and so the resistance also increases. |
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