Physics Indicate the false statement about the resistance of a wire Resistance of metallic wire increases with increase in temperature It is directly proportional to the area of cross-section of wire It is directly proportional to the length of wire It depends on material of wire Resistance of metallic wire increases with increase in temperature It is directly proportional to the area of cross-section of wire It is directly proportional to the length of wire It depends on material of wire ANSWER DOWNLOAD EXAMIANS APP
Physics A transformer Converts AC voltage to D.C. voltage Converts DC to AC Is used to decrease or increase AC voltage Converts electrical energy into mechanical energy Converts AC voltage to D.C. voltage Converts DC to AC Is used to decrease or increase AC voltage Converts electrical energy into mechanical energy ANSWER DOWNLOAD EXAMIANS APP
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. 2000 40 4000 80 2000 40 4000 80 ANSWER DOWNLOAD EXAMIANS APP
Physics What type of heat transfer is boiling water? Convection None of these Conduction Radiation Convection None of these Conduction Radiation ANSWER DOWNLOAD EXAMIANS APP
Physics What is the minimum distance (in metres) required to hear an echo? 13 17 21 10 13 17 21 10 ANSWER DOWNLOAD EXAMIANS APP
Physics The rice is cooked more quickly in a pressure cooker because None of these Water boils at a higher temperature under pressure. Less quantity of water is used. It is covered. None of these Water boils at a higher temperature under pressure. Less quantity of water is used. It is covered. ANSWER DOWNLOAD EXAMIANS APP
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