Physics A copper disc has a hole. If the disc is heated, the size of the hole Increases First increases and than decreases Decreases No change Increases First increases and than decreases Decreases No change ANSWER DOWNLOAD EXAMIANS APP
Physics Magnetic field lines about a current-carrying wire Circle the wire in closed loops Extend radially from the wire None of these Both of these Circle the wire in closed loops Extend radially from the wire None of these Both of these ANSWER DOWNLOAD EXAMIANS APP
Physics Hot springs are heated geothermally by underlying Mitula Water None of these Magma Mitula Water None of these Magma ANSWER DOWNLOAD EXAMIANS APP
Physics The period of revolution of a geostationary satellite is 30 days 24 hours 365 days Changing continuously 30 days 24 hours 365 days Changing continuously ANSWER DOWNLOAD EXAMIANS APP
Physics For photoelectric effect to take place, the metal used as the cathode should have ________ Low melting point Low work function Low resistance High melting point Low melting point Low work function Low resistance High melting point ANSWER DOWNLOAD EXAMIANS APP
Physics On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because plastics have a lower density than metals metals have higher thermal capacity than plastics plastics have a higher thermal conductivity than metals metals are good conductor of heat plastics have a lower density than metals metals have higher thermal capacity than plastics plastics have a higher thermal conductivity than metals metals are good conductor of heat ANSWER DOWNLOAD EXAMIANS APP
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