Physics Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in 4.2 years 42 seconds 4.2 seconds 42 years 4.2 years 42 seconds 4.2 seconds 42 years ANSWER DOWNLOAD EXAMIANS APP
Physics Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? K1+k2/k1k2 2k1k2/k1+k2 K1k2/k1+k2 None K1+k2/k1k2 2k1k2/k1+k2 K1k2/k1+k2 None ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following has the longest wavelength? Ultraviolet radiation Infrared radiation X-ray radiation Visible radiation Ultraviolet radiation Infrared radiation X-ray radiation Visible radiation ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following is the fastest communication channel? Radio wave All are operating at nearly the same propagation speed Optical fiber Microwave Radio wave All are operating at nearly the same propagation speed Optical fiber Microwave ANSWER DOWNLOAD EXAMIANS APP
Physics Light travels at the fastest speed in: water hydrogen glass vacuum water hydrogen glass vacuum ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following occurred first ? Guglielmo Marconi sent out the first wireless signals Wright Brothers successfully flew an aircraft Albert Einstein propounded the General Theory of Relativity Max Planck unveiled the Quantum Theory Guglielmo Marconi sent out the first wireless signals Wright Brothers successfully flew an aircraft Albert Einstein propounded the General Theory of Relativity Max Planck unveiled the Quantum Theory ANSWER DOWNLOAD EXAMIANS APP
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