Physics A single fixed pulley is used to draw water from a well because Force is applied in a convenient direction Velocity ratio is low Efficiency is 100% Mechanical advantage is high Force is applied in a convenient direction Velocity ratio is low Efficiency is 100% Mechanical advantage is high ANSWER DOWNLOAD EXAMIANS APP
Physics In a railway track, two rails are joined end to end with a gap in between them because Accidents due to expansion in summer can be avoided Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train Steel can be saved Accidents due to expansion in summer can be avoided Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train Steel can be saved ANSWER DOWNLOAD EXAMIANS APP
Physics Indicate the false statement about the resistance of a wire It depends on material of wire It is directly proportional to the area of cross-section of wire Resistance of metallic wire increases with increase in temperature It is directly proportional to the length of wire It depends on material of wire It is directly proportional to the area of cross-section of wire Resistance of metallic wire increases with increase in temperature It is directly proportional to the length of wire ANSWER DOWNLOAD EXAMIANS APP
Physics Vegetables are cooked in lesser time by adding a pinch of salt while cooking because Boiling point of water increases Latent heat of vaporization of water decreases Latent heat of vaporization of water increases Boiling point of water decreases Boiling point of water increases Latent heat of vaporization of water decreases Latent heat of vaporization of water increases Boiling point of water decreases ANSWER DOWNLOAD EXAMIANS APP
Physics A ball rolling along the ground gradually slows down and finally comes to rest is due to ________ Friction Electrostatic force Muscular force Magnetic force Friction Electrostatic force Muscular force Magnetic force ANSWER DOWNLOAD EXAMIANS APP
Physics The unit of Planck's constant is J/s Js2 Js–2 Js J/s Js2 Js–2 Js ANSWER DOWNLOAD EXAMIANS APP
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