1.

(A) Electrical conductivity of semiconductors increases with increasing temperature. (R) With increase in temperature, large number of electrons from the valence band can jump to the conduction band

Answer»

Both (A) and (R) are true and (R) is the correct EXPLANATION of (A)
Both (A) and (R) are true and (R) is not the correct explanation of (A)
(A) is true but (R) is false
Both (A) and (R) are false

Answer :A


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