Two long parallel wires Wire 1 and Wire 2 repel each other as shown in the figure. What could be the reasons?
Correct answer: B. Both carry current in opposite direction
- A. Both carry current in same direction
- B. Both carry current in opposite direction
- C. Wire 1 has current, but Wire 2 has no current
- D. Wire 2 has current, Wire 1 has no current
Explanation
Two parallel wires have currents travelling in opposite directions, the magnetic fields generated by those currents between the wires will both point in the same direction (use right hand grip rule). Thus, wires would repel each other.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
Practise Electromagnetism
1,176 free Electromagnetism MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electromagnetism questions
The electron gun in a cathode ray oscilloscope contains:
Which of the following is the proper way to study the sinusoidal waveform of the voltage?
The voltage that is applied across X-plates is provided by a circuit called:
The diagram shows a wire, carrying a current 'I', placed between the poles of a magnet. In which direction does the force on the wire act?
Due to the current in a straight conductor the difference between magnetic field lines:
Magnetic Resonance Imaging (MRI) is used to identify the image of: