Physics In an optical fibre the signal is transmitted Due to total internal reflection Due to refraction In a straight line path In a curved path Due to total internal reflection Due to refraction In a straight line path In a curved path ANSWER DOWNLOAD EXAMIANS APP
Physics In a Laser (say neon laser) all the atoms emit the light waves of Same frequency Same amplitude All of these Same phase Same frequency Same amplitude All of these Same phase ANSWER DOWNLOAD EXAMIANS APP
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? K1k2/k1+k2 None 2k1k2/k1+k2 K1+k2/k1k2 K1k2/k1+k2 None 2k1k2/k1+k2 K1+k2/k1k2 ANSWER DOWNLOAD EXAMIANS APP
Physics A television channel is characterised by Size of picture tube Physical dimension of television screen Frequency of transmitted signal Velocity of transmitted signal Size of picture tube Physical dimension of television screen Frequency of transmitted signal Velocity of transmitted signal ANSWER DOWNLOAD EXAMIANS APP
Physics Metals are good conductors of electricity because: They contain free electrons. The atoms are lightly packed. All of these They have high melting point. They contain free electrons. The atoms are lightly packed. All of these They have high melting point. ANSWER DOWNLOAD EXAMIANS APP
Physics When a barometer is rising air pressure is Constant Decreasing Increasing Zero Constant Decreasing Increasing Zero ANSWER DOWNLOAD EXAMIANS APP
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