Polar Molecules – Rankers Physics

Capacitor With Dielectrics: Practice Problem & Solution

Polar molecules are the molecules
Having a permanent electric dipole moment
Having zero dipole moment
Acquire a dipole moment only in the presence of electric field due to displacement of charges
Acquire a dipole moment only when magnetic field is absent

Solution Explained:

To solve this problem, we apply the core principles of Capacitor With Dielectrics. Understanding the underlying formula is key to arriving at the correct answer below:

Polar molecules possess a permanent electric dipole moment because the centers of positive and negative charges do not coincide even in the absence of an external field.

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Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. Assertion (A): In a system of two concentric shell of inner radius \(a\) and outer radius \(b\). If outer is grounded and inner shell is given charge has less capacitance than inner has grounded and outer is given charge. Reason (R): Electric field is zero outside outer shell when inner shell is grounded.  
2. Energy per unit volume for a capacitor having area A and separation d kept at potential difference V is given by:
3. Two capacitors \( C_1 \) and \( C_2 \) are charged to \( 120\text{V} \) and \( 200\text{V} \) respectively. It is found that by connecting them together the potential on each one can be made zero. Then :
4. A capacitor is connected to a \(12~\text{V}\) battery through a resistance of \(10~Omega\). It is found that the potential difference across the capacitor rises to \(4.0~\text{V}\) in \(1~\mu\text{s}\). Find the capacitance of the capacitor. (Take : \(ln \frac{3}{2} = 0.4\))
5. Two vertical metallic plates carrying equal and opposite charges are kept parallel to each other like a parallel plate capacitor. A small spherical metallic ball is suspended by a long insulated thread such that it hangs freely in the centre of the two metallic plates. The ball, which is uncharged, is taken slowly towards the positively charged plate and is made to touch that plate. Then the ball will