Physics Skating on ice is possible because Ice is cold The surface of ice is smooth The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water The pressure on the ice due to skate raises its melting point Ice is cold The surface of ice is smooth The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water The pressure on the ice due to skate raises its melting point ANSWER DOWNLOAD EXAMIANS APP
Physics When a vehicle passes, TV reception gets distorted. This is because Vehicle pollution affects the performance of the TV components Modern vehicles use electroignition system Spark plug creates electromagnetic disturbances Metal reflects radiowaves Vehicle pollution affects the performance of the TV components Modern vehicles use electroignition system Spark plug creates electromagnetic disturbances Metal reflects radiowaves ANSWER DOWNLOAD EXAMIANS APP
Physics A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct? Both the photons have different energies. The speeds of both the photons in vacuum are different The frequency of X-ray photon is higher than the frequency of visible radiation photon. The wavelength of X-ray photon is less than the wavelength of visible radiation photon. Both the photons have different energies. The speeds of both the photons in vacuum are different The frequency of X-ray photon is higher than the frequency of visible radiation photon. The wavelength of X-ray photon is less than the wavelength of visible radiation photon. ANSWER DOWNLOAD EXAMIANS APP
Physics Who discovered X-ray Wilhelm Rontgen Ernest Rutherford Pierre Curie Marie Curie Wilhelm Rontgen Ernest Rutherford Pierre Curie Marie Curie ANSWER DOWNLOAD EXAMIANS APP
Physics The device used for measuring the wavelength of X-rays is Bragg Spectrometer Cyclotron Mass Spectrometer G.M. Counter Bragg Spectrometer Cyclotron Mass Spectrometer G.M. Counter ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following features of a tunnel diode is its drawback Extremely high frequency response Very low power consumptions Instability due to negative resistance Very wide temperature range of operations Extremely high frequency response Very low power consumptions Instability due to negative resistance Very wide temperature range of operations ANSWER DOWNLOAD EXAMIANS APP
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