TOP 10 Thumb Rules for financial planning Everyone Should Know

What do you understand by the term “electromagnetic induction”? A motor works on the principle of electromagnetic induction. A generator works on the principle of electromagnetic induction.

As the current flows through the coil, the magnetic field lines ae produced. These field lines sustains till the current continues to flow through the coil of electromagnet. When you wrap your right hand around the solenoid with your fingers in the direction of the conventional current, your thumb points in the direction of the magnetic north pole. The Direction of the circular magnetic field lines are given by Maxwell’s right hand grip rule. There are specific situations where right-hands grip rule does apply. → Maxwell’s right hand thumb rule is also known as Maxwell’s corkscrew rule.

An emergency, like an illness or job loss, is unhealthy enough, but not being prepared financially can solely make things worse. A good rule of thumb is to have sufficient put apart in savings to cowl three to 6 months of important expenses. Think of emergency fund contributions as an everyday bill each month, until there may be sufficient constructed up. Fleming’s left-hand rule for electrical motors is considered one of a pair of visual mnemonics, the opposite being Fleming’s right-hand rule .

The direction of the magnetic field in the wire B is anticlockwise. → Clockwise would be the direction of magnetic field in wire A. → Soft iron core is used in the electromagnets because it loses all its magnetism when the current through the coil stops flowing. While in case of steel, there is still some magnetism even after the current stops flowing through the coil of electromagnet. I) Increasing the current flowing through the coil of solenoid. A) For this face of the coil, the current is flowing in the clockwise direction, so it acts as South-Pole.

It can be used to determine the direction of current in a generator’s windings. Direction of the forefinger in the Fleming’s left hand rule represents the magnetic field. → The magnetic field produced by a current carrying solenoid is similar to that produced by a bar magnet. In the simple electric motor right hand gripping rule thumb represents of figure given below, the coil rotates anticlockwise as seen by the eye from the position X when current flows in the coil. The function of commutator rings is to reverse the direction of current flowing through the coil every time the coil just passes the vertical position during a revolution.

A freely suspended magnet points in the north-south direction because earth behaves as a magnet with its south pole in the geographical north and the north pole in the geographical south. Now move the needle to a new position such that its south pole occupies the position previously occupied by its north pole. Because the strength of magnetic field produced by the cable is quite weak. If two streams of electrons or protons are moving with velocity ‘v’ in parallel and same directions, there will be both electric repulsive force and magnetic attractive force. Since electric force predominates the magnetic force, there will be repulsion. In a statement of Fleming’s left-hand rule, the thumb represents the force experienced by the conductor.

The direction of rotation of a D.C. motor is determined by :

The direction of this magnetic field can be obtained by Ampere’s swimming rule. → The part of the electric motor which remain fixed is brush and the part which rotate with the coil is commutator. → Commutator is used to reverse the direction of current in the coil of a motor.

Magnetic field lines inside a current-carrying solenoid are in the form of parallel straight lines. This indicates that the magnetic field inside the solenoid is uniform. The magnetic field produced by a current-carrying solenoid is similar to the magnetic field produced by a bar magnet. If the current around the face of the circular wire flows in the anti-clockwise direction, then that face of the circular wire will be North pole (N-pole).

• The course of the induced magnetic field is usually remembered by Maxwell’s corkscrew rule.
• Excellent article Hemant – You have compiled some of the well known thumb rules (e.g. asset allocatio) as well as some not so well known yet useful rules.
• But whether the “rule of thumb” was accepted as regulation was a separate matter.
• Try combining Rule of 72 with this rule – you will get some amazing numbers.
• If the mains supply is at 230 V, calculate the maximum number of 36 W tube-lights that can be safely used in this circuit.

If a person comes in contact with a live wire, we will switch off the main switch immediately so as to cut off the electricity supply.. Short-circuiting due to damanged wiring or overloading of the circuit can cause electrical fire in a building. An earthing wire is used to save us from the risk of electric shock in case the live wire touches the metal case of the electric appliance.

Introduction to Fleming’s Left Hand Rule and Fleming’s Right Hand Rule

Here are some of my suggestions/perspectives for the 10 rules you ha mentioned. As you have already said in the beginning the rules are for lazy and simpletons, and real gains come after real pains, and I totally agree with this. Still if some one will bother to scroll down up to this point, s/he may get a little extra insight. This was a sheer pleasure to read, right from the cute pic on the top to the rules in the end. Very impressive rules of 72, 70 and 10/5/3, never thought it would be this simple to understand. Usually articles/blogs like these are very complicated, you have done an excellent job to simplify and communicate these, Thanks Sirji.

Questioni) left hand rule ii) right hsnd rule iii) right hand thumb ru… ♠ This rule is used to seek out the direction of magnetic area strains via a rod , Circular loop, Circular coil, and Solenoid. This phrase has been used because the 1600s and the origin is often attributed to domestic violence, nevertheless, there isn’t a proof of the idea.

→ A solenoid is a long coil containing a large number of close turns of insulated copper wire. Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet. Pure copper wire cannot be used as a fuse wire because it has a high melting point due to which it will not melt easily when a short circuit takes place. Name one device which works on the phenomenon of electromagnetic induction. Generator is in the way the two ends of the generator coil are linked to the outer circuit.

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The English phrase rule of thumb refers to a principle with broad application that’s not intended to be strictly correct or dependable for every scenario. It refers to an simply discovered and simply utilized process or normal, primarily based on practical experience somewhat than principle. This utilization of the phrase may be traced back to the seventeenth century and has been related to numerous trades where quantities had been measured by comparability to the width or length of a thumb.

Loan/Liability/Home Rules of Thumb

A galvanometer can be converted into an ammeter by connecting a low resistance into its parallel. Magnetic field inside a toroid is constant and is always tangential to the circular closed path. They are used to res present magnetic B field in a region. Magnetic field is directly proportional to the current passing through the wire and it is inversely proportional to the distance from the wire. → Commutator is the other name for the split ring which is used in the coil of a motor.

In some literature this rule is discussed as if it was a separate rule from the one described in the section above, but it results from the same principles. The right hand rule is a way to predict the direction of a force in a magnetic field. To predict the behavior of positive charges, use your right hand. The direction of induced current produced in a straight conductor moving in a magnetic field is given by Fleming’s right hand rule. This rule is used to determine the direction of magnetic field around a straight current carrying conductor. We take a thick insulated copper wire and fix it in such a way that the portion AB of the wire is in the north-south direction as shown in fig.

Electromagnetism: Fleming’s Left hand Rule, Right Hand Rule, Maxwell’s Right hand thumb/grip rule with statements and uses

So the generation of the magnetic fields can be credited to a magnet! Now we also know that a magnetic field can also be created by an electric current in a conductor. The RIGHT-HAND THUMB RULE of Maxwell helps to find the direction of the magnetic field produced by a straight current-carrying conductor. Here the cause is the current that flows through a straight conductor and the result is the creation of a magnetic field. The right hand grip rule is a conference derived from the proper-hand rule convention for vectors.

A sample dimension that’s too giant will end in losing time and money. It can be unethical to choose too large a sample dimension. There isn’t any certain rule of thumb to determine the sample measurement. In a televised information evaluation about domestic violence in 1994, even commentator Cokie Roberts noted the misunderstanding. The ‘rule of thumb’ has been mentioned to derive from the idea that English legislation allowed a man to beat his spouse with a stick so long as it is was no thicker than his thumb.

The difference between AC and DC is that DC flows in one direction only while AC reverses direction after equal intervals of time. State two ways in which the current induced in the coil of a generator could be increased. The current to the coil must be reversed twice during each rotation so that the coil keeps rotating continuously in the same direction.