Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Given below are two statements:
Statement (I): When currents vary with time, Newton's third law is valid only if momentum carried by the electromagnetic field is taken into account.
Statement (II) : Ampere's circuital law does not depend on Biot-Savart's law.
In the light of the above statements, choose the correct answer from the options given below:
A
Both Statement I and Statement II are true
B
Statement 
is true but Statement II is false
is true but Statement II is false C
Both Statement I and Statement II are false
D
Statement I is false but Statement II is true
Text Solution
Verified by ExpertsThe correct answer is:
A
Statement (I): When currents vary with time, Newton's third law is valid only if momentum carried by the electromagnetic field is taken into account.
This statement is true. In dynamic electromagnetic systems, when dealing with time-varying currents, the electromagnetic fields carry momentum, and thus the conservation laws must account for this momentum aspect, affirming the validity of Newton's laws.
Statement (II): Ampere's circuital law does not depend on Biot-Savart's law.
This statement is also true. Ampere's circuital law can be derived independently of Biot-Savart's law, although both laws describe the magnetic effects of electric currents. Therefore, Ampere's circuital law applies in a broader context than just the applications of the Biot-Savart law.
Conclusion: Both statements are true.
This statement is true. In dynamic electromagnetic systems, when dealing with time-varying currents, the electromagnetic fields carry momentum, and thus the conservation laws must account for this momentum aspect, affirming the validity of Newton's laws.
Statement (II): Ampere's circuital law does not depend on Biot-Savart's law.
This statement is also true. Ampere's circuital law can be derived independently of Biot-Savart's law, although both laws describe the magnetic effects of electric currents. Therefore, Ampere's circuital law applies in a broader context than just the applications of the Biot-Savart law.
Conclusion: Both statements are true.
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