With rise in temperature the resistance of semi-conductors_________________?

A rheostat differs from potentiometer in the respect that it_____________?

A. has lower wattage rating
B. has higher wattage rating
C. has large number of turns
D. offers large number of tapg

In the case of direct current____________?

A. magnitude and direction of current remains constant
B. magnitude and direction of current changes with time
C. magnitude of current changes with time
D. magnitude of current remains constant

It becomes more difficult to remove_________________?

A. any electron from the orbit
B. first electron from the orbit
C. second electron from the orbit
D. third electron from the orbit

A glass rod when rubbed with silk cloth is charged because__________?

A. it takes in proton
B. its atoms are removed
C. it gives away electrons
D. it gives away positive charge