Physics Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ? Ionosphere Stratosphere Exosphere Mesosphere Ionosphere Stratosphere Exosphere Mesosphere ANSWER DOWNLOAD EXAMIANS APP
Physics A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be 2P P < P > P 2P P < P > P ANSWER DOWNLOAD EXAMIANS APP
Physics The motion of a body that repeats itself after a regular interval of time is A periodic motion An aperiodic motion A simple harmonic motion An oscillatory motion A periodic motion An aperiodic motion A simple harmonic motion An oscillatory motion ANSWER DOWNLOAD EXAMIANS APP
Physics Suitable impurities are added to a semiconductor depending on its use. This is done in order to enable it to withstand higher voltages increase its electrical resistivity increase its electrical conductivity increase its life enable it to withstand higher voltages increase its electrical resistivity increase its electrical conductivity increase its life ANSWER DOWNLOAD EXAMIANS APP
Physics The boiling point of water decreases at higher altitudes is due to Low temperature High temprature High atmospheric pressure Low atmospheric pressure Low temperature High temprature High atmospheric pressure Low atmospheric pressure ANSWER DOWNLOAD EXAMIANS APP
Physics Velocity of sound in air does not change with the change of Moisture content in air Wind in the direction of propagation of sound Pressure of air Temperature of air Moisture content in air Wind in the direction of propagation of sound Pressure of air Temperature of air ANSWER DOWNLOAD EXAMIANS APP
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