SIR,
 
 
Can you pls tell why does a Voltmeter has HIGH RESISTANCE and an Ammeter has LOW RESISTANCE?

Asked by seeni2005 | 31st May, 2016, 10:39: AM

Expert Answer:

A voltmeter is always coonected in parallel across a device to measure the voltage across it. Now, if the voltmeter has low resistance, then the current will split and flow through the voltmeter also, thereby giving incorrect or undesired results across the device. Hence, it has a high resistance so that negligible current flows through it.
 
Similarly, an ammeter is always coonected in series with the device to measure the current through it. Now, if the ammeter has high resistance, then the current will not flow through the ammeter and through the device also, thereby giving incorrect or undesired results across the device. Hence, it has a low resistance so that entire current flows through it and the device.

Answered by Romal Bhansali | 1st Jun, 2016, 10:05: AM