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Consider the following statements regarding the sources of error in a Q-meter.
1. If a coil with a resistance R is connected in the direct measurement mode and if the residual resistance of the Q-meter is 0.1 R, then the measured Q of the coil would be 1.1 times the actual Q.
2. If the inductance to be measured is less than 0.1μH, the error due to the presence of residual inductance cannot be neglected.
3. The presence of distributed capacitance in a coil modifies the effective Q of the coil. Of these statements
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- 1, 2 and 3 are correct
- 1 and 2 are correct
- 2 and 3 are correct
- 1 and 3 are correct
Correct Option: C
Q = Lω/R.
With Q-meter resistance considered, the measured or indicated Q is 1/1.11 times the actual Q. Thus statement 1 is not correct. Hence statements 2 and 3 are correct.
