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tli)n(h)The Bragg's law is:(i) 2Ad-ncosec 0(ii) 2nd-n sin θ2d(ii)ncosec(iv) 2d nsin(i)If an electron can be stopped by a potential of 5 volts, its kineticenergy is:(i) 5 volts () 5 joules (ii) 5 calorie (iv) 5 ev0) neutral temperature of a thermo-couple is the temperature at wihcthe thermo e.m.f. is:(i) Zero (ii) Maximum (ii) Minimum (iv) Changes sign |
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