Question

Electric current arises from flow of charged particles, now

A.
in metals it is mainly due to flow of electrons

B.
in a semiconductor it is mainly due to flow of holes

C.
in electrolytes it is mainly due to flow of negative ions

D.
in discharge tubes at low pressure it is due to flow of positive ions

Answer 1

Answer:

d) it is the right answer

Answer 2

Answer:

Upon reviewing the statements we can have the correct statements as given below

i) In metals, only movable charges are free electrons

ii) In semi conductor’s current is due to both electrons and holes

iii) In electrolytes current is due to both positive and negative ions

iv) In discharge tubes both positive and electrons constitute current in gases at low pressure

Therefore option a