Physics A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat? Conduction and radiation only Convection and radiation only Conduction, convection and radiation Conduction and convection only Conduction and radiation only Convection and radiation only Conduction, convection and radiation Conduction and convection only ANSWER DOWNLOAD EXAMIANS APP
Physics To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor Can be of any shape Should be made of a good conductor but can be of any shape Should be made of a good conductor like copper with sharp-pointed edges Should be in the form of a vertical rod Can be of any shape Should be made of a good conductor but can be of any shape Should be made of a good conductor like copper with sharp-pointed edges Should be in the form of a vertical rod ANSWER DOWNLOAD EXAMIANS APP
Physics If the spinning speed of the earth is increased then the weight of body at the equator Increases Double Same Decreases Increases Double Same Decreases ANSWER DOWNLOAD EXAMIANS APP
Physics The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by Bernoulli's principle Newton's third law of motion Magnetic properties of the ship's material Earth's gravitational force Bernoulli's principle Newton's third law of motion Magnetic properties of the ship's material Earth's gravitational force 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
Physics The working of the quartz crystal in the watch is based on the Photoelectric Effect Edison Effect Piezo - electric Effect Johnson Effect Photoelectric Effect Edison Effect Piezo - electric Effect Johnson Effect ANSWER DOWNLOAD EXAMIANS APP
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