A 150 V moving iron voltmeter of accuracy class 1-0 reads 75 V when used in a circuit under standard condition. The maximum possible percentage error in the reading is 2% 1% 1.5% 2.5% TRUE ANSWER : ? YOUR ANSWER : ?
Unit of deflection sensitivity of a CRO is mm / V. mm per mV. meter / volt. V / mm. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following cannot be measured by multimeters? Voltage Frequency Resistance Current TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following are integrating instruments? Ampere hour and watt hour meters Voltmeters Ammeters Wattmeters TRUE ANSWER : ? YOUR ANSWER : ?
A potentiometer may be used for Measurement of current All of the listed here Calibration of ammeter Measurrment of resistance TRUE ANSWER : ? YOUR ANSWER : ?
The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ? ± 3.0% ±0.5% ± 1.5% ±3.5% TRUE ANSWER : ? YOUR ANSWER : ?
In a dynamometer wattmeter, the moving coil is the None of the listed here Current coil Potential coil Current coil and potential coil TRUE ANSWER : ? YOUR ANSWER : ?
To measure 5 volts, if one selects a 0-100 volt range voltmeter which is accurate with in ± 1%, then the error in this measurement may be up to ± 2.5% ± 7.5 % ± 1.5% ± 20% TRUE ANSWER : ? YOUR ANSWER : ?
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be 0.2% less. 0.4 more. 0.4% less. 0.2% more. TRUE ANSWER : ? YOUR ANSWER : ?
A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage 1 %. 3.33 %. 2.66 %. 2 %. TRUE ANSWER : ? YOUR ANSWER : ?