Question

Voltage ranges in a meter are _________

(a) 5-10-15

(b) 20-50-100

(c) 0.5-1-1.5

(d) 1-3-10

I have been asked this question during an online interview.

My question comes from Consideration in Selecting Voltmeter topic in division Electronic Instruments of Electrical Measurements

Answer 1

Right choice is (d) 1-3-10

To elaborate: Meter scale will have a calibration of 1-3-10 for the voltage range with a separation of 10 dB. It can also be in the sequence of 1.5-5-15. We can also make use of a single scale.