For measuring a very high resistance we should use Megger Wheat stone bridge Kelvin's double bridge None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
When checked with an ohm meter an open resistor reads zero. high but within tolerance. low but not zero. infinite. TRUE ANSWER : ? YOUR ANSWER : ?
A single phase load is connected between R and Y terminals of a 415 V, symmetrical, 3-phase, 4 wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read + 597 W. - 597 W. + 795 W. - 795 W. TRUE ANSWER : ? YOUR ANSWER : ?
The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and stray fields are perpendicular. inclined at 60o. parallel. inclined at 30o. TRUE ANSWER : ? YOUR ANSWER : ?
The measured value of a resistance is 10.25 ohm, whereas its value of 10.22 ohm. What is absolute error of the measurement? 10.26 ohm. 0.03 ohm. 0.01 ohm. 15.36 ohm. TRUE ANSWER : ? YOUR ANSWER : ?
The chemical effect of current is used in None of these C. ammeter C. ammeter hour meter C. energy meter TRUE ANSWER : ? YOUR ANSWER : ?
The problem of Electrostatic coupling in a transformer is acute at Low frequencies High frequencies High load on the transformer Power frequencies TRUE ANSWER : ? YOUR ANSWER : ?
The scale of hot wire ammeter is Absloute linear. Non Linear. Linear. Cramped. TRUE ANSWER : ? YOUR ANSWER : ?
On a simple ohmmeter, the 0 Ω mark is _______ of the scale. Far right Far left In the middle None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?