Physics A small gap is left at the joints of rails in a railway track to Avoid the tracks being distorted due to seasonal temperature variation Control the speed of train Avoid the heating of tracks to high temperature Keep the rails equidistant Avoid the tracks being distorted due to seasonal temperature variation Control the speed of train Avoid the heating of tracks to high temperature Keep the rails equidistant ANSWER DOWNLOAD EXAMIANS APP
Physics The time period of a seconds pendulum is 1.5 second 2 seconds 0.5 second 1 second 1.5 second 2 seconds 0.5 second 1 second ANSWER DOWNLOAD EXAMIANS APP
Physics A needle or a pin floats on the surface of water because of Surface energy Surface tension Adhesive force Viscosity Surface energy Surface tension Adhesive force Viscosity ANSWER DOWNLOAD EXAMIANS APP
Physics The function of ball bearings in a wheel is : To convert static friction into kinetic friction Just for convenience To convert kinetic friction into rolling friction To increase friction To convert static friction into kinetic friction Just for convenience To convert kinetic friction into rolling friction To increase friction ANSWER DOWNLOAD EXAMIANS APP
Physics A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance Will decrease Will increase Does not change Varies with the increase of depth of the immersion of the iron piece Will decrease Will increase Does not change Varies with the increase of depth of the immersion of the iron piece ANSWER DOWNLOAD EXAMIANS APP
Physics The device used to change the speed of an electric fan is Regulator Amplifier Rectifier Switch Regulator Amplifier Rectifier Switch ANSWER DOWNLOAD EXAMIANS APP
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