![]() ?-particles can penetrate 1mm of lead or 5 mm of aluminium. Here you can download a free 1st-year chapter-wise test pdf. Notes on Penetration power ?-radiations can penetrate even 30 cm of iron. 1st year Test session 2023 Hello, I know you want to find the 1st year physics chapter-wise test pdf. Notes on Ionising power If one unit is ionising power of ?-radiations, then 100 units is ionising power of ?-particles and 10000 units is the ionising power of ?-particles. They are not affected by electric or magnetic fields. ![]() They have a very high penetration power.They are electromagnetic waves, having wavelength less than 0.01 Å.They have less ionising power than ?-particles.They have more penetration power than ?-particles.They are negatively charged particles, having a charge equal to –1.6 × 10– 19 C and mass 9.1 × 10–31 kg.They produce fluorescence in the zinc sulphide screen.They are doubly ionised helium nuclei having a mass equal to 6.64 × 10–27 kg and charge equal to 3.2 × l0–19 C. i want applied physics important questions with answers immediately.
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