Physics Why the needle of iron swims on water surface when it is kept gently ? The density of needle is less than that of water It will remain under the water, when it will displace more water than its weight Due to its shape Due to surface tension The density of needle is less than that of water It will remain under the water, when it will displace more water than its weight Due to its shape Due to surface tension ANSWER DOWNLOAD EXAMIANS APP
Physics What is the name of the device used to convert alternating current into direct current ? Transformer Rectifier Ammeter Galvanometer Transformer Rectifier Ammeter Galvanometer ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following is not a property of heavy water ? Freezing point of heavy water is higher than that of ordinary water Boiling point of heavy water is lower than that or ordinary water Density of heavy water is higher than that of ordinary water It produces corrosion Freezing point of heavy water is higher than that of ordinary water Boiling point of heavy water is lower than that or ordinary water Density of heavy water is higher than that of ordinary water It produces corrosion 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 None K1k2/k1+k2 K1+k2/k1k2 2k1k2/k1+k2 None K1k2/k1+k2 ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following property of sound is affected by change in air temperature? Amplitude Frequency Intensity Wavelength Amplitude Frequency Intensity Wavelength ANSWER DOWNLOAD EXAMIANS APP
Physics A metal-semiconductor junction diode is called ________ Tunnel diode Photo diode Schottky diode P-N Juction diode Tunnel diode Photo diode Schottky diode P-N Juction diode ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS