Indian Navy SSR Science & Technology — practice questions
21 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Indian Navy SSR Science & Technology in the app →The Sanskrit text in which Acharya Kanada's atomic ideas are recorded is:Who discovered the **electron** and in which year?In a cathode ray tube, the rays move from:Cathode rays are streams of:Thomson's model of the atom is also called the:In the watermelon analogy of Thomson's atomic model:In the gold foil experiment, the particles aimed at the gold foil were:An alpha particle is identical to a nucleus of:Most alpha particles in the gold foil experiment:From the gold foil experiment, Rutherford concluded that the positive charge of an atom is:The approximate diameter of an atom is:The approximate diameter of the nucleus is:If an atom were the size of a cricket ground (~100 m), the nucleus would be roughly the size of:Which scientific phenomenon, discovered in the late 19th century, demonstrated that atoms are NOT indivisible?Why is Rutherford's atomic model called the **planetary model**?In Rutherford's atomic model, most of the mass of the atom is concentrated in:In Thomson's model, the colour of an atom (as shown in diagrams):The deflection of alpha particles from their straight path in the gold foil experiment is technically called:At ordinary room temperature, the speed of sound in air is approximately:A 2 kg ball is lifted to a height of 3 m. Taking g = 10 m/s², the gain in gravitational PE is:The kinetic energy of a 2 kg object moving at 5 m/s is: