Assertion (A): Conduction and displacement current may be present in the same region of space.
Reason (R): There is no perfectly conducting or perfectly insulating medium.
1. Both (A) \(&\) (R) are true and the (R) is the correct explanation of the (A)
2. Both (A) \(&\) (R) are true but the (R) is not the correct explanation of the (A)
3. (A) is true but (R) is false
4. Both (A) and (R) are false
View Answer
In a real dielectric medium with some conductivity, both conduction current (due to charge movement) and displacement current (due to changing electric fields) can exist simultaneously. As no material is perfectly conducting or insulating, this coexistence is possible.
Assertion (A): A magnetic needle when placed in between the plates of a parallel plate capacitor under charging, the needle shows deflection.
Reason (R):As the charge on the capacitor plates increases, the electric field and the electric flux between the plates changes which generates a magnetic field.
1. Both (A) &(R) are true and the (R) is the correct explanation of the (A)
2. Both (A) &(R) are true but the (R) is not the correct explanation of the (A)
3. (A) is true but (R) is false
4. Both (A) and (R) are false
View Answer
During capacitor charging, the changing electric field produces a displacement current \(I_d = epsilon_0 frac{dPhi_E}{dt}\). This displacement current generates a magnetic field, causing the needle to deflect. Thus, A and R are true, and R explains A.