Physics Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m. 80 2000 40 4000 80 2000 40 4000 ANSWER DOWNLOAD EXAMIANS APP
Physics Which waves cannot be transmitted through vacuum? Heat Light Electromagnetic Sound Heat Light Electromagnetic Sound ANSWER DOWNLOAD EXAMIANS APP
Physics Which type of mirror is used in the head lights of vehicles ? Plane mirror Concave mirror Convex mirror Parabolic mirror Plane mirror Concave mirror Convex mirror Parabolic mirror ANSWER DOWNLOAD EXAMIANS APP
Physics A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? Dacrease Will increase first and then dcrease Increase Remain constant Dacrease Will increase first and then dcrease Increase Remain constant ANSWER DOWNLOAD EXAMIANS APP
Physics According to the quantum theory of light, the energy of light is carried in discrete units are called Photoelectrons Protons Photons Electrons Photoelectrons Protons Photons Electrons ANSWER DOWNLOAD EXAMIANS APP
Physics In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch? To allow the heat to get into the food through the hole To allow the microwaves to get into the food through the holes To prevent the steam pressure from bursting open the pouch To allow the aroma of the food to come out through the holes To allow the heat to get into the food through the hole To allow the microwaves to get into the food through the holes To prevent the steam pressure from bursting open the pouch To allow the aroma of the food to come out through the holes ANSWER DOWNLOAD EXAMIANS APP
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