Physics
Grade-10
Easy
Question
A straight wire is carrying an electric current. Which of the following is true about it?
- There are no magnetic lines of force near the wire
- There are lines of force, and they are circular lines encircling the wire
- The lines of force are straight lines parallel to the wire and in the same direction as the current
- The lines of force are straight lines parallel to the wire in the direction opposite to the current
Hint:
There are lines of force, and they are circular lines encircling the wire when a straight wire carries an electric current.
The correct answer is: There are lines of force, and they are circular lines encircling the wire
- The magnetic field is formed when an electric wire comes in contact with the magnet or current-carrying conductor.
- It forms the lines of the magnetic field between the north-south poles which encircled the magnet.
- Using the right-hand screw rule, it is possible to identify the circular magnetic lines of forces that surround a straight wire carrying an electric current.
Related Questions to study
Physics
What are the factors affecting the strength of the magnetic field at a point due to a straight conductor carrying current?
What are the factors affecting the strength of the magnetic field at a point due to a straight conductor carrying current?
PhysicsGrade-10
Physics
A vertically placed straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is:
A vertically placed straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is:
PhysicsGrade-10
Physics
In the right-hand thumb rule for current-carrying wire the thumb points toward the:
In the right-hand thumb rule for current-carrying wire the thumb points toward the:
PhysicsGrade-10
Physics
We can study the magnetic field lines, around a straight current-carrying conductor using a:
We can study the magnetic field lines, around a straight current-carrying conductor using a:
PhysicsGrade-10
Physics
An electric current pass through a long straight wire. At a distance 5 cm from the wire, the magnetic field is B. The field at 20 cm from the wire would be:
An electric current pass through a long straight wire. At a distance 5 cm from the wire, the magnetic field is B. The field at 20 cm from the wire would be:
PhysicsGrade-10
Physics
A current-carrying conductor is held in the exact vertical direction. To produce a clockwise magnetic field around the conductor, the current should be passed through the conductor:
A current-carrying conductor is held in the exact vertical direction. To produce a clockwise magnetic field around the conductor, the current should be passed through the conductor:
PhysicsGrade-10
Physics
The magnetic field at a point around a straight current-carrying wire is:
The magnetic field at a point around a straight current-carrying wire is:
PhysicsGrade-10
Physics
The magnetic field around a straight current-carrying wire is:
The magnetic field around a straight current-carrying wire is:
PhysicsGrade-10
Physics
The direction of the magnetic field for a vertically placed straight current-carrying wire having a current flowing bottom to top is:
The direction of the magnetic field for a vertically placed straight current-carrying wire having a current flowing bottom to top is:
PhysicsGrade-10
Physics
The magnetic field around a straight current-carrying wire is:
The magnetic field around a straight current-carrying wire is:
PhysicsGrade-10
Physics
The magnetic field around a current-carrying wire is:
The magnetic field around a current-carrying wire is:
PhysicsGrade-10
Physics
Read the following statements and choose the correct option:
Statement A: Oersted, a Danish physicist first noticed the magnetic effect of electric current.
Statement B: The strength of the magnetic field is indicated by the closeness of the field lines.
Read the following statements and choose the correct option:
Statement A: Oersted, a Danish physicist first noticed the magnetic effect of electric current.
Statement B: The strength of the magnetic field is indicated by the closeness of the field lines.
PhysicsGrade-10
Physics
Which of the following correctly describes the magnetic field near a long straight wire?
Which of the following correctly describes the magnetic field near a long straight wire?
PhysicsGrade-10
Physics
Who has stated the Right-hand Thumb Rule?
Who has stated the Right-hand Thumb Rule?
PhysicsGrade-10
Physics
If we keep a magnetic needle near a current-carrying conductor, it:
If we keep a magnetic needle near a current-carrying conductor, it:
PhysicsGrade-10
