Question:
When a dielectric is placed in an electric field, the electric field inside the dielectric
When a dielectric is placed in an electric field, the electric field inside the dielectric
Show Hint
The dielectric polarises and the induced charges produce a field opposite to the applied field.
Updated On: Nov 12, 2026
- increases
- decreases
- is constant
- is zero
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
When a dielectric is placed in an external field, its molecules get polarised.
Step 2: Induced Field
Bound charges appear on the surfaces and create an induced field opposite to the applied field.
Step 3: Net Field
The net field inside is \(E=\dfrac{E_{0}}{K}\) with \(K>1\), which is less than \(E_{0}\).
Step 4: Compare the options
The field decreases, option (B). It does not become zero, as it would in a conductor.
Final Answer:
The electric field inside the dielectric decreases. \[ \boxed{\text{(B) }\text{decreases}} \]
When a dielectric is placed in an external field, its molecules get polarised.
Step 2: Induced Field
Bound charges appear on the surfaces and create an induced field opposite to the applied field.
Step 3: Net Field
The net field inside is \(E=\dfrac{E_{0}}{K}\) with \(K>1\), which is less than \(E_{0}\).
Step 4: Compare the options
The field decreases, option (B). It does not become zero, as it would in a conductor.
Final Answer:
The electric field inside the dielectric decreases. \[ \boxed{\text{(B) }\text{decreases}} \]
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