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? None 2k1k2/k1+k2 K1+k2/k1k2 K1k2/k1+k2 None 2k1k2/k1+k2 K1+k2/k1k2 K1k2/k1+k2 ANSWER DOWNLOAD EXAMIANS APP
Physics A device used for converting a.c. into d.c. is called Transformer Dynamo Rectifier Induction coil Transformer Dynamo Rectifier Induction coil ANSWER DOWNLOAD EXAMIANS APP
Physics A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that The metal ball suffers greater change in momentum The rubber ball suffers greater change in momentum Both suffer the same change in momentum The initial momentum of the rubber ball is greater than that of the metal ball The metal ball suffers greater change in momentum The rubber ball suffers greater change in momentum Both suffer the same change in momentum The initial momentum of the rubber ball is greater than that of the metal ball ANSWER DOWNLOAD EXAMIANS APP
Physics The force that keeps a body in a circular motion called The centripetal force The frictional force The centrifugual force All listed here The centripetal force The frictional force The centrifugual force All listed here ANSWER DOWNLOAD EXAMIANS APP
Physics Magnetic field lines about a current-carrying wire Extend radially from the wire Both of these Circle the wire in closed loops None of these Extend radially from the wire Both of these Circle the wire in closed loops None of these ANSWER DOWNLOAD EXAMIANS APP
Physics The work done by the string of a simple pendulum during one complete oscillation is equal to Kinetic energy of the pendulum Zero Potential energy of the pendulum Total energy of the pendulum Kinetic energy of the pendulum Zero Potential energy of the pendulum Total energy of the pendulum ANSWER DOWNLOAD EXAMIANS APP
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