421 Sterilization of surgical instruments medical supplies and bandages can be done by exposing them to a beam of_______________? Physics Medium Full question → A α-rays B β-rays C γ-rays D B and C have equal antiseptic propertie
422 Various types of cancer are treated by_________________? Physics Medium Full question → A Cobalt-60 B Strontium-90 C Carbon-14 D Nickel-63
423 Which of the following radiations are suitable for the treatment of an infection in the interior of the body ? Physics Medium Full question → A α-rays B β-rays C γ-rays D X-rays
424 The path of alpha particle is_______________? Physics Medium Full question → A Rectilinear B Curved C Zig-zag or erratic D Elliptical
425 During an encounter with an atom alpha particle knocks out ______________? Physics Medium Full question → A Protons B Electrons C Neutrons D Nothing
426 Pair production takes place in the vicinity of a heavy nucleus so that_____________? Physics Medium Full question → A Net energy is conserved B Net charge is conserved C Net momentum is conserved D All of the above
427 If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________? Physics Medium Full question → A Fission reaction B Fusion reaction C Chain reaction D Chemical reaction
428 Radioactive materials can be identified by measuring their_______________? Physics Medium Full question → A Hardness B Density C Mass D Half life
429 Ina liquid metal fast breeder reactor, the type of uranium used is______________? Physics Medium Full question → A 92U235 B 92U238 C 92U234 D 92U239
430 During the fission process a large amount of______________? Physics Medium Full question → A Heat energy is released B Nuclear energy is released C Chemical energy is released D Light energy is released
431 What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ? Physics Medium Full question → A 1N B 10N C 2N D 100N
432 The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________? Physics Medium Full question → A π B 3π C 6π D 12π
433 The angular speed of seconds hand of a watch in rads-1 is______________? Physics Medium Full question → A π B π/2 C π/30 D π/180
434 In an angular motion, Newton’s second law of motion is_____________? Physics Medium Full question → A F=ma B F=τp/It C Στ = I α D All above
435 If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________? Physics Medium Full question → A π /3 x r B π/6 x r C V/30 x r D π / 180 x r
436 A cyclist cycling around a circular racing track skids because_____________? Physics Medium Full question → A the centripetal force upon him is less than limiting friction B the centripetal force upon him is greater than limiting friction C the centripetal force upon him is equal to the limiting friction D the friction between the tyres of the cycle and road vanishes
437 When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is_______________? Physics Medium Full question → A 2π B π/2 C π D 20π
438 The angular speed for daily rotation of the earth in rad S-1 is______________? Physics Medium Full question → A 7.3 x 10 radians/second B 7.3 x 5 radians/second C 3.7 x 10 7.3 x 5 radians/second D 7.3 x 10-5 radians/second
439 A body moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R the ration of displacement to the covered path will be_____________? Physics Medium Full question → A πR B 2π R C 0 D 4πR
440 A body can have constant velocity when it follows a_____________? Physics Medium Full question → A Elliptical path B Circular path C Parabolic path D Rectilinear path