Physics Water pipes in hilly areas often burst on a cold frosty night, because Water in the pipes freezes and on freezing water expands, so pipes break Frost makes the pipes rusty, so they break The material of which pipes are made contracts due to cold and so breaks None of these Water in the pipes freezes and on freezing water expands, so pipes break Frost makes the pipes rusty, so they break The material of which pipes are made contracts due to cold and so breaks None of these ANSWER DOWNLOAD EXAMIANS APP
Physics When hot liquid is poured into a thick glass tumbler, it cracks because glass : Is a bad conductor of heat so only inner surface expands Has high temperature coefficient of expansion Has low temperature coefficient of expansion Has a very low specific heat Is a bad conductor of heat so only inner surface expands Has high temperature coefficient of expansion Has low temperature coefficient of expansion Has a very low specific heat ANSWER DOWNLOAD EXAMIANS APP
Physics Unit of impedance is ________ Henry Ohm Tesla Hertz Henry Ohm Tesla Hertz ANSWER DOWNLOAD EXAMIANS APP
Physics Period of oscillation of 3 cm microwaves in seconds is 1 × 10–10 1 × 1010 0.001 0.01 1 × 10–10 1 × 1010 0.001 0.01 ANSWER DOWNLOAD EXAMIANS APP
Physics To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor Should be in the form of a vertical rod Should be made of a good conductor like copper with sharp-pointed edges Should be made of a good conductor but can be of any shape Can be of any shape Should be in the form of a vertical rod Should be made of a good conductor like copper with sharp-pointed edges Should be made of a good conductor but can be of any shape Can be of any shape ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS