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Given (A): The material of the cathode in a thermionic emitter should have a small work function. (R): This is to facilitate electron emission only when large heat is supplied (1) Both A and R are true and R is the correct explanation of A (2) Both A and R are true but R is not the correct explanation of A (3) A is true but R is false (4) A is false but R is true |
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Answer» The Correct option is (3) A is true but R is false |
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