Question: In case of measurement of intensity of test source, a standard source is used. The photometric head used when comparing two lights of different colours , is :
Answer:
MCQ: In case of measurement of intensity of test source, a standard source is used. The photometric head used when comparing two lights of different colours , is :
Correct Answer:
A. Bunsen photometer head
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Related Questions
- 1. One of the combinations of materials used for optical fibers is :
- 2. For fiber optical sensors,
- 3. In optical fibres, if the total reflection is to take place, the following conditions must be satisfied______Where n<sub>1 </sub> and n<sub>2</sub> are respectively refractive indices of core and cladding and Φ<sub>1 </sub> is angle of incidence.
- 4. In a graded index fibre, the total reflected light takes a
- 5. The optical sensors may be classified as :
- 6. A PMMC meter has an internal resistance 200Ω and the current required for its full scale deflection is 50µA. the metering is capable of measuring, on its own, a maximum voltage of :
- 7. A PMMC meter has an internal resistance 500Ω and the current required for its full scale deflection is 100µA.the power consumed by the meter is :
- 8. An average reading VTVM uses one diode connected in series with an external resistance. A high value of series resistance is used so that the instrument should have :
- 9. In a compensated shunt type peak reading VTVM a bucking battery with a series adjustable resistance is used for :
- 10. In a different amplifier using two FETs, a resistance has to be reducing the meter current to zero even when no voltage is applied to the circuit. This is necessitated on account of :
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