ELECTRIC CURRENT PART II

Question 1

One of the following is Ohm conductor
a. Neon gas
b.Junction Diode
c.Diode valve
d.CuSO4 solution

Answer 1

d.CuS04 solution

Note:-
Neon gas Non ohmic
Junction Diode semi conductor

Question 2

In metals conduction of electricity is due to
a.free electrons
b.bound electrons
c.ions
d.atoms

Answer 2

a.free electrons

Question 3

Net charge in the current carrying conductor is
a.positive
b.negative
c.zero
d.Constant

Answer 3

c.zero

Question 4

As the temperature of a metallic resistors increases the product of its resistivity and conductivity
a.increases
b.decreases
c.constant
d.May increase or decrease

Answer 4

c.remain constant

Question 5

The unit of electrical conductivity is
a.ohm-m
b.ohm/m
c.ohm-¹meter
d.(ohmmeter)-¹

Answer 5

d

Question 6

The radius of a conducting wire is doubled then its specific resistance is
a.double
b.becomes 4time
c.constant
d.1/4

Answer 6

c.constant

Question 7

Which of the following relation is called as current density?
a.I²/A²
b.l²/A
c.A/I
d.l/A

Answer 7

d.l/A