Question 2
Marks : +2 | -2
Pass Ratio : 100%
What is the purpose of a differential amplifier in voltmeter?
Explanation: Differential amplifiers is included in voltmeters to avoid any spurious signals, which may arise due to electrostatic stray field.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
In a CRO what is the purpose of the blanking circuit?
Explanation: Blanking circuit is used to eliminate retrace of signals when spot moves from left to right.