Q. A megger has a hand driven dc generator.

View solution

Q. A hot wire instrument is not affected by stray magnetic fields.

View solution

Q. Assertion (A): A ballistic galvanometer is used to measure charge.

Reason (R): In a flux meter, the damping is large.

View solution

Q. Assertion (A): A transducer needs an output measuring or display device for measuring a non electrical quantity.

Reason (R): In some transducers the output voltage is too small and needs amplification before it can be measured.

View solution

Q. Acoustic strain gauges

View solution

Q. Which of these instruments is dynamometers type?

View solution

Q. The instrument used to check insulation of household wiring is

View solution

Q. Watthour meter is an integrating instrument

View solution

Q. An ammeter is

View solution

Q. It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is

View solution

Q. Assertion (A): When frequencies of signals fed to X and Y plates of CRO are multiples of each other, Lissajous pattern is displayed on screen.

Reason (R): In a CRO, the vertical deflection is proportional to voltage applied to Y plates.

View solution

Q. In portable instruments, damping is provided by

View solution

Q. The sensitivity of electromagnetic digital flow meter can be increased by increasing

View solution

Q. The increase in intensity of trace in a CRO causes a change in

View solution

Q. A diode peak reading VTVM and thermocouple meter are connected across output of an amplitude modulated circuit. In the absence of modulation both meters read 10 V. When sinusoidal AM is applied, VTVM reads 15V The reading of thermocouple meter will be

View solution

Q. The resistance of voltmeter affects the accuracy of measurement in loss of charge method.

View solution

Q. In a hot wire instrument, the deflection is proportional to

View solution

Q. A permanent magnet moving coil meter can be used as

View solution

Q. If temperature increases by about 50°, the resistance of thermistor changes to

View solution

Q. Which of the following draws minimum power from source?

View solution