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James2911
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New poster has been reminded to use the Homework Help Template when posting schoolwork questions, and to post only one question per thread.
Hi. I have three questionns to ask.
(b) R/30^1/2
(C) R/50^1/2
(d) R/150^1/2
2. A charge +2q moves vertically upwards with speed v, a second charge q moves horizontally to the right with the same speed v, and a third charge +q moves horizontal to the right with the same speed v. The point P is located a perpendicular distance a away from each charge as shown in the figure. The magnetic field at P is ..
Here’s the diagram:
q > v

 ^ v
 
 
. P o +2q



o> v (+q)
Answer is :
Out of the page with magnitude u(naught) 4qv/4pia^2

 (current flowing thru here is 3I)


> x
 (current flowing in +x is I)

The answer is x=3y
Since the above 2 diagrams might not be clear, I am uploading screenshots for the same.1. I tried the first question thinking as a Bionomial expression, and getting x = .794R which is not even in the option.
2.I've always solved problems in which only a wire is involved, either square, triangle, straight shapes. But not charges. Do we apply Biot Savart law here? I am able to determine the direction of the magnetic field via knocking rule but have completely no idea about the magnitude.
3. I am guessing, since we want it to be zero, we will place it on X axis first, so that the field due to itself is zero and then at a distance of 3y it will be zero from the yaxis as well or so.
Any help would be appreciated!
 A very close point on the axis foo a current carrying circular coil (x<<<R) of radius R, the value of magnetic field decreases by a fraction of 5% with respect to the center value. The position of the point from the center of the coil is:
(b) R/30^1/2
(C) R/50^1/2
(d) R/150^1/2
2. A charge +2q moves vertically upwards with speed v, a second charge q moves horizontally to the right with the same speed v, and a third charge +q moves horizontal to the right with the same speed v. The point P is located a perpendicular distance a away from each charge as shown in the figure. The magnetic field at P is ..
Here’s the diagram:
q > v

 ^ v
 
 
. P o +2q



o> v (+q)
Answer is :
Out of the page with magnitude u(naught) 4qv/4pia^2
 The equation of line on which magnetic field is zero due to system of two perpendicular infinitely long current carryng straight wire is :

 (current flowing thru here is 3I)


> x
 (current flowing in +x is I)

The answer is x=3y
Since the above 2 diagrams might not be clear, I am uploading screenshots for the same.1. I tried the first question thinking as a Bionomial expression, and getting x = .794R which is not even in the option.
2.I've always solved problems in which only a wire is involved, either square, triangle, straight shapes. But not charges. Do we apply Biot Savart law here? I am able to determine the direction of the magnetic field via knocking rule but have completely no idea about the magnitude.
3. I am guessing, since we want it to be zero, we will place it on X axis first, so that the field due to itself is zero and then at a distance of 3y it will be zero from the yaxis as well or so.
Any help would be appreciated!
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