Physics Working of safety fuses depends upon1. magnetic effect of the current2. chemical effect of the current3. magnitude of the current4. heating effect of the currentSelect the correct answer using the code given below. 1, 2 and 3 only 1, 2, 3 and 4 4 only 3 and 4 only 1, 2 and 3 only 1, 2, 3 and 4 4 only 3 and 4 only ANSWER DOWNLOAD EXAMIANS APP
Physics Which one of the following determines the sharpness of image in a camera ? The focal length of the lens The aperture Size of the camera The exposure time The focal length of the lens The aperture Size of the camera The exposure time ANSWER DOWNLOAD EXAMIANS APP
Physics Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ? Mesosphere Ionosphere Exosphere Stratosphere Mesosphere Ionosphere Exosphere Stratosphere ANSWER DOWNLOAD EXAMIANS APP
Physics Lightning heats the surrounding air to 30000 deg Cent 3000 deg Cent 300 deg Cent 300000 deg Cent 30000 deg Cent 3000 deg Cent 300 deg Cent 300000 deg Cent ANSWER DOWNLOAD EXAMIANS APP
Physics The device used for locating submerged objects under sea is. Radar Laser Maser Sonar Radar Laser Maser Sonar ANSWER DOWNLOAD EXAMIANS APP
Physics A single fixed pulley is used to draw water from a well because Force is applied in a convenient direction Mechanical advantage is high Velocity ratio is low Efficiency is 100% Force is applied in a convenient direction Mechanical advantage is high Velocity ratio is low Efficiency is 100% ANSWER DOWNLOAD EXAMIANS APP
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