Question

An uncharged parallel plate capacitor is connected to a battery. The electric field between the plates is 10V/m. Now a dielectric of dielectric constant 2 is inserted between the plates filling the entire space. The electric field between the plates now is

(A) 5 V/m 

(B) 20 V/m 

(C) 10 V/m 

(D) none of these

Answer 1

Correct option (C) 10 V/m

Explanation: 

As voltage applied across capacitor is same i.e. 10V in both case. Therefore in both case

Ed = 10 ⇒ 10/d 

as d is constant . Therefore electric field remians the same as 10 V/m