Physics Which of the following principle is used to produce ''low-temperatures' ? Thermo-electric effect Adiabatic demagnetisation Joule-Kelvin effect Super conductivity Thermo-electric effect Adiabatic demagnetisation Joule-Kelvin effect Super conductivity ANSWER DOWNLOAD EXAMIANS APP
Physics Curie point is the temperature at which Transmutation of metal occurs. A metal loses conductivity A metal loses magnetic properties. Matter becomes radioactive Transmutation of metal occurs. A metal loses conductivity A metal loses magnetic properties. Matter becomes radioactive ANSWER DOWNLOAD EXAMIANS APP
Physics Stars are held together by Electrical forces Magnetic forces Ionic forces Gravitational forces Electrical forces Magnetic forces Ionic forces Gravitational forces ANSWER DOWNLOAD EXAMIANS APP
Physics In a railway track, two rails are joined end to end with a gap in between them because Accidents due to expansion in summer can be avoided Steel can be saved Air-gaps are necessary for bearing the weight of running train Accidents due to contraction in winter can be avoided Accidents due to expansion in summer can be avoided Steel can be saved Air-gaps are necessary for bearing the weight of running train Accidents due to contraction in winter can be avoided ANSWER DOWNLOAD EXAMIANS APP
Physics The device used to convert solar energy into electricity is Daniell cell Galvanic cell Electrochemical cell Photovoltaic cell Daniell cell Galvanic cell Electrochemical cell Photovoltaic cell ANSWER DOWNLOAD EXAMIANS APP
Physics Sound of frequency below 20 Hz is called supersonics audio sounds ultrasonic infrasonic supersonics audio sounds ultrasonic infrasonic ANSWER DOWNLOAD EXAMIANS APP
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