Question:
State whether the following statements are true or false.- The field at the centre of a long circular coil carrying current will be parallel straight lines.
- A wire with a green insulation is usually the live wire of an electric supply.
State whether the following statements are true or false.
- The field at the centre of a long circular coil carrying current will be parallel straight lines.
- A wire with a green insulation is usually the live wire of an electric supply.
Updated On: Nov 6, 2023
Hide Solution
Verified By Collegedunia
Solution and Explanation
(a) True: A long circular coil is a long solenoid. The magnetic field lines inside the solenoid are parallel lines.
(b) False: Live wire has red insulation cover, whereas earth wire has green insulation colour in the domestic circuits.
Was this answer helpful?
0
0
Top Questions on Magnetic Field Due To A Current-Carrying Conductor
- There is a thin conducting wire carrying current. The value of magnetic field induction at any point on the conductor would be:
- CUET (UG) - 2023
- Physics
- Magnetic Field Due To A Current-Carrying Conductor
- Magnetic field \(|B|\) at a point \(P\) in the following network is:
- CUET (UG) - 2023
- Physics
- Magnetic Field Due To A Current-Carrying Conductor
Questions Asked in CBSE X exam
- Why could different persons have different notions of a country’s development? Explain with examples.
- CBSE Class X - 2024
- Development
- The graph of a polynomial intersects the y-axis at one point and the x-axis at two points. The number of zeroes of this polynomial are :
- CBSE Class X - 2024
- Polynomials
- It is our attitude towards a situation that makes it positive or negative. Do you agree with it? Express your views with reference to the poem, ‘Dust of Snow’.
- CBSE Class X - 2024
- Dust of Snow
- Study the data given below showing the focal length of three concave mirrors A, B and C and the respective distances of objects placed in front of the mirrors:
Case Mirror Focal Length (cm) Object Distance (cm) 1 A 20 45 2 B 15 30 3 C 30 20
(i) In which one of the above cases the mirror will form a diminished image of the object? Justify your answer.
(ii) List two properties of the image formed in case 2.
(iii) (A) What is the nature and size of the image formed by mirror C? Draw ray diagram to justify your answer.OR
(iii) (B) An object is placed at a distance of 18 cm from the pole of a concave mirror of focal length 12 cm. Find the position of the image formed in this case.- CBSE Class X - 2024
- Light - Reflection and Refraction
- The roots of the quadratic equation \(x^2 + x – p (p + 1) = 0 \)are :
- CBSE Class X - 2024
- Quadratic Equations
View More Questions
Concepts Used:
Magnetic Field
The magnetic field is a field created by moving electric charges. It is a force field that exerts a force on materials such as iron when they are placed in its vicinity. Magnetic fields do not require a medium to propagate; they can even propagate in a vacuum. Magnetic field also referred to as a vector field, describes the magnetic influence on moving electric charges, magnetic materials, and electric currents.
A magnetic field can be presented in two ways.
- Magnetic Field Vector: The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid. Each vector points in the direction that a compass would point and has length dependent on the strength of the magnetic force.
- Magnetic Field Lines: An alternative way to represent the information contained within a vector field is with the use of field lines. Here we dispense with the grid pattern and connect the vectors with smooth lines.
Properties of Magnetic Field Lines
- Magnetic field lines never cross each other
- The density of the field lines indicates the strength of the field
- Magnetic field lines always make closed-loops
- Magnetic field lines always emerge or start from the north pole and terminate at the south pole.