A wire is connected to a battery and a compass. What is the effect on the compass needle?
Q1. A wire is connected to a battery and a compass. What is the effect on the compass needle?
Answer: Deflection towards the wire
Explanation: When a wire is connected to a battery, it acts as a conductor of electric current, which interacts with the Earth's magnetic field and deflects the compass needle. The other options do not describe the effect correctly.