The electric intensity and electric potential at a certain distance r from a point charge in air are 150 V/ m and 300 V respectively. Find the distance r

Question

The electric intensity and electric potential at a certain distance r from a point charge in air are 150 V/ m and 300 V respectively. Find the distance r  (A)  2 m  (B)  4 m  (C)  0.5 m  (D)  0.4 m

Tardigrade Admin · Accepted Answer

E(r)=150 V m-1, V(r)=300 V, r=? V(r)=E (r) r ⇒ r=(V(r)/E(r)) =(300/150) m =2 m

Q. The electric intensity and electric potential at a certain distance $r$ from a point charge in air are $150 V / m$ and $300 V$ respectively. Find the distance $r$

$2 m$

$4 m$

$0.5 m$

$0.4 m$

$E (r) = 150 V m^{- 1}$ ,
$V (r) = 300 V$ ,
$r = ?$
$V (r) = E (r) r$
$\Rightarrow r = \frac{V ( r )}{E ( r )}$
$= \frac{300}{150} m$
$= 2 m$

Q. The electric intensity and electric potential at a certain distance r from a point charge in air are 150V/m and 300V respectively. Find the distance r

2m

4m

0.5m

0.4m