DMRC JE ELECTRICAL EXAM HELD ON 2015 quesion paper with explanattions

DMRC JE ELECTRICAL EXAM HELD ON 15 /03 /2015

Q NO 1. The ratio of voltage and current in a closed circuit : 

                 a ) varies      b) remains constant    c) increases         d ) decreases

            

     explanations : (B ) remains constant 

                             * The ratio of voltage and current in a closed ckt remains constant if the                                                temperature and other physical quantity are remains constant and ckt elements are                              also linear .

            * if ckt is non linear ,then the ratio of voltage and current in a closed ckt is varies . bcz ratio of                 voltage and current in resistance or impedence and resistance is dependent on temperature .

Q NO 2 .