ThePrismSolutions

ThePrismSolutions

DAILY PRACTICE PAPER(19Th June 2018)


(1) The resistance of a semi-conductor

(a) increase with increase of temperature
(b) decrease with increase of temperature
(c) does not change with change of temperature
(d) first decreases and then increases with increase of temperature

(2) Specific resistance of a wire depends upon

(a) it's length       (b) it's cross-section area
(c) it's dimensions   (d) it's material

(3) Ohm's law deals with the relation between

(a) current and potential difference
(b) capacity and charge
(c) capacity and potential
(d) all are true

(4) Ohm's law is valid when the temperature of the conductor is -


(a) constant     (b) very high
(c) very low     (d) varying



(5) A certain piece of copper is to be shared into a conductor of minimum resistance .Its length and diameter should be respectively

(a) l , d        (b) 2l , d
(c) l/2 , 2d     (d) 2l , d/2



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