Which of the following is correct?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Both (1) and (2)
Option (1) Magnetism and electricity are closely related. — Incorrect. This statement is true. But statement (2) is true as well, so this is not the full answer.
Option (2) A compass kept near a current-carrying wire shows a deflection. — Incorrect. This statement is also true. It leaves out statement (1), which holds too.
Option (3) Both (1) and (2) — Correct. Both statements hold:
In 1820 Oersted found that a current in a straight wire causes a noticeable deflection of a nearby compass needle, so (2) holds.
From this he concluded that moving charges or currents produce a magnetic field, which showed that electricity and magnetism are closely related, so (1) holds.
NCERT (2026-27):
Introduction – “Both Electricity and Magnetism have been known for more than 2000 years. However, it was only about 200 years ago, in 1820, that it was realised that they were intimately related. During a lecture demonstration in the summer of 1820, Danish physicist Hans Christian Oersted noticed that a current in a straight wire caused a noticeable deflection in a nearby magnetic compass needle.”