Practice portal › Moving Charges and Magnetism › Ampere's Circuital Law, Solenoid and Toroid

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.

Asked in JEE Main 9th April 1st Shift 2024 · Thick wires and cables

• (1) Both Statement I and Statement II are true.
• (2) Statement I is true but Statement II is false.
• (3) Statement I is false but Statement II is true.
• (4) Both Statement I and Statement II are false.

Step-by-step solution

Why the other options are wrong

• (1) Treats Ampere's law as independent, though it follows from the Biot-Savart law
• (3) Calls Statement I false, but field momentum is needed for Newton's third law when currents vary
• (4) Calls Statement I false; it is true (only Statement II is false)

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.