engineering recuitment NCRTC Station Controller Mock Test 2021 General Science Physics Laws and Principles

α- कणों को किसके द्वारा खोजा गया था?

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जे. जे. थॉमसन
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ए. आइंस्टीन
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ई. रदरफोर्ड
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मैडम क्यूरी
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