How can you determine the direction of field lines?
A magnetic field line is the path along which a free north-pole tends to move. The direction of a magnetic field at a point is determined by placing a small compass needle. The N – pole of compass indicates the direction of magnetic field at that point.
How can we determine the direction of magnetic field?
The right hand rule states that: to determine the direction of the magnetic force on a positive moving charge, point your right thumb in the direction of the velocity (v), your index finger in the direction of the magnetic field (B), and your middle finger will point in the direction of the the resulting magnetic force …
How can we produce a permanent magnet by using solenoid?
Answer. When a material is placed inside a coil carrying current ( may be solenoid) it will get magnetised. A bunch of nails or an iron rod placed along the axis of the coil can be magnetised by the current allowed to pass through the coil. Once the current is put-off the magnet field will lost.
What is the direction of magnetic flux?
The general direction for the magnetic flux flow is from the North ( N ) to the South ( S ) pole. In addition, these magnetic lines form closed loops that leave at the north pole of the magnet and enter at the south pole. Magnetic poles are always in pairs.
What is the direction of the magnetic field around a bar magnet?
The lines of magnetic field from a bar magnet form closed lines. By convention, the field direction is taken to be outward from the North pole and in to the South pole of the magnet. Permanent magnets can be made from ferromagnetic materials.
How can you use a compass needle to determine the direction of a magnetic field?
Magnetic fields
- place the plotting compass near the magnet on a piece of paper.
- mark the direction the compass needle points.
- move the plotting compass to many different positions in the magnetic field, marking the needle direction each time.
- join the points to show the field lines.
Where exactly does a compass point?
north
Where does a compass needle always point?
Why does a compass always point to the North?
A magnetic compass points to the earth’s magnetic poles, which are not the same as earth’s geographic poles. When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole.
Which direction do the paperclips point?
Earth’s south magnetic pole is near Earth’s geographic north. Earth’s magnetic north pole is near Earth’s geographic south. That’s why the north pole of a compass points toward north because that’s where Earth’s south magnetic pole is located and they attract.
Will a paperclip float in soapy water?
When you initially drop the paper clip into the bowl of water, it sinks, as the paperclip is too dense. Adding the dish soap breaks the bonds between the water molecules, thus breaking the surface tension and causing the paper clip to sink.
What happens if you bend a paperclip?
When you bend the paper clip back and forth, you’re creating strain in this lattice, pushing some of the atoms closer together while others get pulled further apart.
Can you harden a paperclip?
Firstly, bending the paper clip back and forth produces an effect on the metal known as work hardening. As you do more work on the metal, it becomes harder and more brittle. Eventually, it will become so brittle that it will snap, and this is why you can snap a cheap spoon simply by bending it back and forth.
What happen to materials when bent?
Answer: When stretched or bent too much, some materials will continue to deform but permanently hold their bent shape instead of springing back. The bending movement can cause the molecular structure of it to either bend, stretch, get brittle or break.
Why can you bend a paperclip only a few times before it breaks?
Typically the 180-degree bend breaks the paper clip in less than half the number of bends due to the greater stress on the bending point. If serrated paper clips are available, the serrations give a point for cracks to start, so the clips will typically break sooner.
What happened to the copper wire when bent?
Answer: If a wire is bent to form loops, it acts as an inductor. Each loop of the inductor exhibits a capacitance effect with the next loop. So, explicitly, the resistance of the wire doesn’t change when you bend it.
What happened to paper clip soft electric wire when bent?
It undergoes plastic deformation as the discontinuities in the crystal structure of the metal slip and rearrange. After repeated bending, the discontinuities become so tangled that they can’t slip any more – the metal is said to work harden.
How can you change the shape of a paperclip?
Answer. Explanation: through bending the paper clip changes it shape and it’s size.
What happens to solid when Bent pressed?
Answer: When solid materials are bent, pressed, or hammered experience a physical change. Examples of physical change include changes in size, shape, and state. The processes that cause physical changes are cutting, bending, dissolving, freezing, boiling, and melting.
Is it important to know if the material can be bent pressed hammered or cut?
No. when materials are bent, pressed, etc., those are just physical changes and the materials may change.
Why do you think the materials can be bent?
Answer. Answer: Elasticity describes a material’s tendency to return to its original size and shape when a distorting force is removed. As opposed to materials that exhibit plasticity (where the change in shape is not reversible), an elastic material will return to its previous configuration when the stress is removed.
Are solid materials can be bent?
Explanation: Solid materials can be bent. When materials are bent, new material is formed. Only the physical appearance of a material is changed when it is cut.
Can all solid materials can be bent?
* Solids have a definite shape and can be bent.
What metal can be bent without breaking?
The property usually applies to the family groups 1 to 12 on the modern periodic table of elements. It is the ability of a solid to bend or be hammered into other shapes without breaking. Examples of malleable metals are gold, iron, aluminum, copper, silver, and lead. Gold and silver are highly malleable.