What is a continuous conducting path?
A continuous conducting path consisting of wires and other resistances (like electric bulb, etc.) and a switch, between the two terminals of a cell or a battery along which an electric current flows, is called a circuit. It is a continuous and closed loop or path of electric current.
What are a circuit’s two requirements?
In an electric circuit, all connections must be made and made by conducting materials capable of carrying charge. There must be a closed conducting loop from the positive to the negative terminal in order to establish a circuit and to have a current.
Can a compass be used to determine the direction of charge?
[b] A compass can be used to determine the exact direction that charge flows in a circuit. False. A compass can be used to determine relative direction but not absolute direction.
What does a compass tell you about what is happening in the wires?
We use a compass to tell us relative direction of the charge. Charge flows through the wire. What happens in the wires when the battery connections are reversed?
How does current affect a compass?
If you hold a compass near a wire through which current is flowing, the needle on the compass will be deflected. Since compasses work by pointing along magnetic field lines, this means that there must be a magnetic field near the wire through which the current is flowing.
Does current flow clockwise or counterclockwise?
In the given diagram, what is the direction of the magnetic field at a point ? Explanation: Current flows counterclockwise in this circuit. Using the right hand rule for the conventional current in the wire, the right thumb is pointed along the wire pointing to the left at the top of the circuit.
What happens when we bring a magnetic compass near a closed electric circuit?
What happens to the needle of a compass kept nearby when electric current is switched on in a wire?
The needle of a magnetic compass starts deflecting when it is kept nearby a wire through which electric current is flowing. Therefore, this magnetic needle and the magnetic field suffer attractions and repulsions and hence the needle gets deflected.
What happens when the compass is placed below the wire instead of on top of it?
Thus, when a magnetic compass is brought below the current carrying wire the compass needle show deflection in the north-south direction.
Why does the needle of the magnetic compass deflect when it is kept near an electric circuit?
When a magnet is brought close to it, the needle gets deflected. When an electric current passes through a wire, it behaves like a magnet. This magnetic effect of the electric current makes the compass needle deflect from the north-south direction.
What happens to the magnetic needle kept in a non uniform magnetic field?
It will experience force and torque both. Due to unequal forces acting on the poles, it will experience torque.
Does compass needle shows deflection in tap water?
We have tested the conduction of electricity through tap water. Let us now test the conduction of electricity through distilled water….Table 1 Good/Poor Conducting Liquids.
|Material||Compass Needle Shows Deflection Yes/No||Good Conductor/Poor Conductor|
|Tap Water||Yes No||Good Poor|
What is the reason behind the deflection of magnetic needle?
The deflection of the magnetic needle shows that electric current is flowing through the wires. The circuit is complete since the free ends of the tester are dipped into a solution. Also, the solution is a good conductor of electricity. So, the magnetic needle shows deflection.
What is deflection of needle?
This deflection can be defined as the deviation of the needle from its suspected straight insertion path. …
What is the SI unit of magnetic field?
What is electromagnetic induction class 10th?
The process of producing induced current in a closed circuit or in a coil by changing the magnetic field linked with the coil is known as electromagnetic induction. This process of producing induction current is known as electromagnetic induction.
What is Fleming’s left hand rule Class 10?
Answer: Fleming’s Left hand rule states that if we arrange our thumb, forefinger and middle finger of the left hand right angles to each other, then the thumb points towards the direction of the magnetic force, the forefinger points towards the direction of magnetic field and the middle finger points towards the …
What are the ways to induce current in a coil?
Answer: The different ways to induce current in a coil are as follows: (i) If a coil is moved rapidly between the two poles of a horse-shoe magnet, then an electric current is induced in the coil. (ii) If a magnet is moved relative to a coil, then an electric current is induced in the coil.
What are the three ways to induce current?
The three ways to induce a current are: 1. place it in a changing magnetic field; 2. change the area of the loop; 3….change the orientation of the loop with respect to the magnetic field.
- Move a bar magnet in the presence of a coil loop.
- 1) Move a bar magnet near a stationary coil.
What are the 2 ways to induce an electric current?
Electric current can be induced in a coil due to the relative motion between the coil and a magnetic field….Answer
- Inducing current on a coil by moving the coil in a magnetic field.
- Inducing current on a coil by by changing the magnetic field across it.
How do you induce current?
What is Induced Current?
- change the strength of the magnetic field.
- moving the conductor in and out of the field.
- altering the distance between the magnet and the conductor, or change the area of a loop located in a stable magnetic field.
Does Loop area affect the current flow?
The loop area effects the flow of current. So, if we decrease the loop area will are increasing the flow of current, while increasing the loop area will decrease the flow of current. . 4.
Why does coiling a wire increase current flow?
N Increasing the number of coils, which adds more field lines and makes the electromagnet stronger. This is the magnetic field around a piece of wire, compared to a magnetic field on a loop or solenoid it is weak. Turning coils around and passing a current through them will make a much stronger electromagnet.
Is it OK to coil power cables?
When an AC cable is tightly coiled the coil is subject to autotransformer effect which can cause an incorrect voltage applied to the equipment, and greater heat generation in the coil. Yes and no. If coiled very loosely so that air can circulate freely around the wiring to prevent heat build-up should be OK.
Does coiling a wire increase resistance?
If you coil a wire its resistance does not change. As that is purely down to the material that the wire is made out of and the diameter, temperature coefficient and the length of the wire. Coiling the wire will however will change the inductance of the wire.
Where is the strongest magnetic field in a coil?
The strongest external magnetic fields are near the poles. A magnetic north pole will attract the south pole of another magnet, and repel a north pole.