Question

Chose the correct statement from the following:

• A. Electric current is a scalar quantity
• B. Charge carries in metals are ions
• C. The area of current- time graph gives charge
• D. A charge in motion produces both electric and magnetic field

Answer 1

Answer: (A), (C), (D)

The correct options are
A Electric current is a scalar quantity
C The area of current- time graph gives charge
D A charge in motion produces both electric and magnetic field

$\left(i\right)$ Option- $A$ is correct, since current has no directional attribute to it, it is a scalar quantity.

$\left(ii\right)$ Option- $B$ is correct, Charge carries in metal are free electrons whereas in electrolytic solution they are ions

$\left(iii\right)$ Option- $C$ is correct because $i=\frac{da}{dt}\Rightarrow =idt\Rightarrow a=\int i.dt$

$\int i.dt$ is the area under current-time graph

$\left(iv\right)$ Option- $D$ is correct, charge in motion produces current which in term produces magnetic field.