A 1 mA meter is to be converted to 1 A ammeter. The meter resistance is 100 Ω. The value of shunt resistance 1000 Ω. 0.001 Ω. 0.1001 Ω. 100 Ω. TRUE ANSWER : ? YOUR ANSWER : ?
Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is 0.6 lead. 0.917 lead. 0.917 lag. 0.6 lag. TRUE ANSWER : ? YOUR ANSWER : ?
A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of All of above. Resistance of connecting leads. Thermoelectric emfs. Contact resistance. TRUE ANSWER : ? YOUR ANSWER : ?
Following is a 16-bit register for 8085 microprocessor Accumulator Register C Stack pointer Register B TRUE ANSWER : ? YOUR ANSWER : ?
The inductance of a certain moving iron ammeter is expressed as L = 2+5θ-θ2 µH. The control spring torque is 2 × 10-6 Nm/radian. Find the deflection in radians for a current of 2A. 1 4 5 2 TRUE ANSWER : ? YOUR ANSWER : ?
A potentiometer may be used for Measurrment of resistance Measurement of current Calibration of ammeter All of the listed here TRUE ANSWER : ? YOUR ANSWER : ?
The internal resistance of an ammeter should be Infinity Medium Very small High TRUE ANSWER : ? YOUR ANSWER : ?
A moving coil permanent magnet instrument can be used as ______ by using a low resistance shunt. Ammeter Voltmeter Flux meter Ballastic galvanometer TRUE ANSWER : ? YOUR ANSWER : ?
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is 4% 3% 1% 2% TRUE ANSWER : ? YOUR ANSWER : ?
Purely mechanical instrument cannot be used for dynamic measurements because they have high inertia. All of these higher response time. large time constant. TRUE ANSWER : ? YOUR ANSWER : ?