9th Class Physics MCQS Work and Energy Online Test 4

kinetic-energy-is-directly-proportional-to-the-velocity-of-a-body-3-a_-_square,one-horse-pover-is-equal-to-3-a_-_746-w,one-mega-watt-is-equal-to-3-a_-_10-3-csup-3-e-2-3-c-2-fsup-3-ew,rate-of-doing-work-is-called-3-a_-_power,si-unit-of-work-is-3-a_-_joule,the-device-converts-light-energy-into-electrical-energy_-_electric-generator,the-efficiency-of-solar-cell-is-3-a_-_3-25,the-efficiency-percentage-of-an-electric-lamp-is-3-a_-_5-25,the-energy-in-the-stretched-bow-is-3-a_-_elastic-potential-enery,the-energy-stored-in-coal-is-3-a_-_chemical-energy,the-kinetic-energy-of-a-body-of-mass-2-kg-is-25-j-its-speed-will-be_-_5-ms-3-csup-3-e-1-3-c-2-fsup-3-e,the-work-done-lifting-a-brick-of-mass-2-kg-through-a-height-of-5-m-above-the-ground-will-be_-_100-j,which-device-of-the-following-converts-light-energy-into-electrical-energy-3-a_-_photo-cell