Single Answer MCQ
Q-00001750
What is the significance of the deflection of a compass needle when an electric current passes through a metallic conductor?
1
It indicates the conductor's resistance
2
It shows the direction of current flow
3
It demonstrates the presence of a magnetic field
4
It measures the conductor's temperature
Answer and Solution
Answer
C. It demonstrates the presence of a magnetic field
Solution:
The deflection of a compass needle when an electric current passes through a metallic conductor demonstrates the presence of a magnetic field around the conductor. This phenomenon links electricity and magnetism. Therefore, the correct answer is 'It demonstrates the presence of a magnetic field'.
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