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The suitability of a light intensity data logger in its operation in circuits.
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- At what distance does a 100-W lightbulb produce the same intensity of light as a 75-W lightbulb produces 10 m away? (Assume both have the same efficiency for converting electrical energy in the circuit into emitted electromagnetic energy.)What is difference between absorptive power and spectral absorptive power?At what distance does a 100-W lightbulb producethe same intensity of light as a 75-W lightbulb produces10 m away? (Assume both have the same efficiency forconverting electrical energy in the circuit into emittedelectromagnetic energy.)
- A thin linear dipole antenna is λ/12 long and its loss resistance is 1.2 Ω. Find the radiation resistance and efficiency.A 100-W tungsten-filament lamp has a luminous efficiency of 16 lm/W. Find its intensityDetermine the effective area of a half-wave dipole antenna at 100 MHz, and compare it with its physical crosssection if the wire diameter is 2 cm.
- A station is given a carrier frequency of 88 kHz. Having a modulating frequency of 12 kHz, compute for the upper and lower sidebands of the station.Comment on the relationship between the inter-element distance (7.5cm) and a wavelength of an EM wave (0.15m). What would be the effect on the inter-element distance if an EM wave at a higher frequency was used, assuming all other parameters were required to stay the same.How does an antenna for receiving EM signals works?