Chemistry, Physics

[gaurav95]

Chem:- What is halide and  halogenation
Phy:-Where do we use left hand rule and Right hand rule(Flemming's)?Can somebody give me some e.g.s on that thx

[holtadit]

A halide ion is a a group 7 ion.

Like chloride Cl^- is a halide ion.


Halogenation is basically a substitution reaction between an alkane and any free radical halide.

For example methane reacts with chlorine free radical to form chloromethane and hydrogen chloride.

The essential condition is UV light.

[Snake]

Yea I want to know the same thing for Phy, I don't get it lol

[Ghost Of Highbury]

thuMb represents the motion
Forefinger represents the field
Central finger represents the current..
look at the capital letters...M F C ...motion,field,current..

Right hand rule is used to find the direction of the current in a generator.

Left Hand rule to find the direction of the motion of the wire in a motor.

[rahuldevnani93]

Left hand rule is applied when current causes motion

Right hand rule is applied when motion causes current...

[Snake]

Examples please?

[gaurav95]

thuMb represents the motion
Forefinger represents the field
Central finger represents the current..
look at the capital letters...M F C ...motion,field,current..

Right hand rule is used to find the direction of the current in a generator.

Left Hand rule to find the direction of the motion of the wire in a motor.

I am sorry to ask this qs but are you sure about your answer

[Ghost Of Highbury]

I am sorry to ask this qs but are you sure about your answer

yes, very sure

[holtadit]

Question 9 C   ii


Why does the wire move towards the thick rigid one ? PLEASE READ THE BELOW PARAGRAPHS FIRST

If the current is flowing down both wires there is a magnetic field going clockwise IN BOTH WIRES, hence shouldnt they deflect ?


OR is it a rule that mag fields that move in the same direction (clockwise/anticlcokwise) interact and hence cause an ATTRACTION

[Ghost Of Highbury]

Ok this is tricky, i have to use the image to explain, answer in next post.

[holtadit]

Ok this is tricky, i have to use the image to explain, answer in next post.

Thanks man. 

[Ghost Of Highbury]

Refer to the diagram attached herewith.

The orange line indicates the magnetic field. As u can see it is in a circular form, Now, here u have to use the flemming's left hand rule.

However, as the magnetic field is in circular form u have to choose one point to apply the Left hand rule. The red point marken on the line T3-T4 is that point. (Note - the red point shudve been on the wire (T3-T4), it didnt come up in the image, sry abt that)

Okay, so at that point, the magnetic field is pointing in the direction of the blue arrow (consider it as a tangent to the circle)

The brown arro indicates the current.

If u arrange ur left hand in this form u will see the movement of the wire is towards the thick rigid wire as ur thumb points towards it.

im not sure abt this, astar plz check. thanks

[holtadit]

Refer to the diagram attached herewith.

The orange line indicates the magnetic field. As u can see it is in a circular form, Now, here u have to use the flemming's left hand rule.

However, as the magnetic field is in circular form u have to choose one point to apply the Left hand rule. The red point marken on the line T3-T4 is that point. (Note - the red point shudve been on the wire (T3-T4), it didnt come up in the image, sry abt that)

Okay, so at that point, the magnetic field is pointing in the direction of the blue arrow (consider it as a tangent to the circle)

The brown arro indicates the current.

If u arrange ur left hand in this form u will see the movement of the wire is towards the thick rigid wire as ur thumb points towards it.

im not sure abt this, astar plz check. thanks

Dude, that was an A 1 explanation. Short and sweet, the way I like it. Thanks alot understood it completely . I'd +rep you but I have to spread the love 

[Ghost Of Highbury]

Thanks, dont worry abt the rep. Dude, one confusing thing here.

As  both the wires are conducting current, both will have their magnetic field, thus u may ask, y is the magnetic field of the thicker wire taken into consideration. I think this is because the thicker wire will have less resistance, and thus more current which makes the magnetic field stronger.

[The Golden Girl =D]

i didn't get the blue aroow thing