Physics Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K? K1+k2/k1k2 K1k2/k1+k2 None 2k1k2/k1+k2 K1+k2/k1k2 K1k2/k1+k2 None 2k1k2/k1+k2 ANSWER DOWNLOAD EXAMIANS APP
Physics Light travels at the fastest speed in: water hydrogen glass vacuum water hydrogen glass vacuum ANSWER DOWNLOAD EXAMIANS APP
Physics Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes 5R/4 3R/4 2R R/2 5R/4 3R/4 2R R/2 ANSWER DOWNLOAD EXAMIANS APP
Physics Which of the following liquids has the least density ? Salt water Fresh water Petrol Mercury Salt water Fresh water Petrol Mercury ANSWER DOWNLOAD EXAMIANS APP
Physics The focal length of a concave mirror with a radius of curvature of 20.0 cm is : 10 cm 20 cm 5 cm 15 cm 10 cm 20 cm 5 cm 15 cm ANSWER DOWNLOAD EXAMIANS APP
Physics A single fixed pulley is used to draw water from a well because Efficiency is 100% Force is applied in a convenient direction Velocity ratio is low Mechanical advantage is high Efficiency is 100% Force is applied in a convenient direction Velocity ratio is low Mechanical advantage is high ANSWER DOWNLOAD EXAMIANS APP
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