An ammeter is a Integrating instrument Recording instrument Secondary instrument Absolute instrument TRUE ANSWER : ? YOUR ANSWER : ?
It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor? 100W 200W 150W 50W 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% ± 20% ± 1.5% ± 7.5 % TRUE ANSWER : ? YOUR ANSWER : ?
The errors mainly caused by human mistakes are systematic error. observational error. instrumental error. gross error. TRUE ANSWER : ? YOUR ANSWER : ?
Null type recorders are LVDT recorders. bridge recorders. any one of the above. potentiometric recorders. TRUE ANSWER : ? YOUR ANSWER : ?
Kelvin’s double bridge is used to measure low resistance because there is no thermo electric emf. resistance variation due to temperature. effect of contact and lead resistance is eliminated. it has high sensitivity. TRUE ANSWER : ? YOUR ANSWER : ?
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is 1.7 V. 1.34 V. 1 V. 1.5 V. TRUE ANSWER : ? YOUR ANSWER : ?
How many time-base circuits does a dual face CRO can have? 4. 2. 3. 1. TRUE ANSWER : ? YOUR ANSWER : ?
Which amplifier in used in an electronic amplifier? Power amplifier. Butter amplifer. Differential amplifier. Wideband amplifier. TRUE ANSWER : ? YOUR ANSWER : ?
Which of following are needed both for protection and metering? Instrument transformer. Power factor meters. Energy meter. Wattmeters. TRUE ANSWER : ? YOUR ANSWER : ?