Problem

$\bullet$$\bullet$ Base pairing in DNA, I. The tw…

04:47

Problem 23 Medium Difficulty

$\bullet$$\bullet$ Three charges are at the
corners of an isosceles trian-
gle as shown in Figure 17.42 .
The $\pm 5.00 \mu C$ charges form
a dipole. (a) Find the magni-
tude and direction of the net
force that the $-10.0 \mu \mathrm{C}$
charge exerts on the dipole.
(b) For an axis perpendicular
to the line connecting the two
charges of the dipole at its
midpoint and perpendicular
to the plane of the paper, find the magnitude and direction of
the torque exerted on the dipole by the $-10.0 \mu C$ charge.

Answer

a) $F_{\text { net }}=1688 \mathrm{N}$ , From $+5$ to $-5$ .
b) $\tau=22.3 \mathrm{N}$ , counterclockwise.

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Physics 102 Electricity and Magnetism

College Physics

Chapter 17

Electric Charge and Electric Field

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Video Transcript

Oh, in this problem, it is given that there are two charges. Last five micro columns and minus five. My group columns. These charges are making our die pull. And there is a car charge minus 10 micro columns, which is forming. And I so silly strangled with this that ball thes sites off the triangle are given its 0.2 meter, 0.2 meters and the distance between the two charges. He's given us 0.3 meters from the trigonometry. We can find this distance as zero point 013 meters and this Angan Rita, as Rita calls too, for be it 16 Big grease. No. The Net Force on minus 10. Micro columns do do. Plus five micro columns is attractive. And the words plus five micro columns This is that and the force on minus stand Micro Coghlan's by minus five micro columns is in this direction because this is a repulsive force. Uh, having the same magnitude as the previous force. No, these 24 sets. Can we do? I did in Judah components as, uh, cost rita. Uh, cost Rita. These two components will cancel out each other. And the Net Force on minus 10. Micro column will be aboard as to f sign. Rita, this is the net Force on the minus stand micro Coolum Judge So the net force can be read unless f sign Rita. Now, stop shooting that given values. We can die too, into the electrostatic force, which is 19 to 10 to the power nine in tow, 5 to 10 to the power minus six. Which is the magnitude off the charts off that I pull in tow. Then my curriculum charge in tow. Sign What be it 16 dignities. Why distance between the two charges? 0.2 s square. This will give us the net force by the die pull on minus stand micro Coolum Charge is equal to 1687 0.7 Newton's and the Force on my list and my group Coolum charge by the double is in the upwards to addiction now from the Newtons. Tylo! If the apple is acting the net force on minus 10 Micro Coolum charge in the upwards direction. Then my nest and micro Coolum child will exert an equal and opposite force on the Dapple Testa net force on Dybul is in downwards direction, having thus save magnitude as 16 87.7 Newtons, The force on the dappled by the minus 10 micro Coolum charges in the downward direction having the magnitude 16 87.7 mutants. Now for the second part of the question were to find that door exerted by them. Understand, Micro Coolum, charge on the double. How is return is the net force under the apple which is 16. 87 0.7 in Judah perpendicular distance between the force and uh, excess, which is 0.13 meters as excesses perpendicular. So the plane off the paper. So this stark really come s 20 for 1.93 new done meters in the clockwise direction.

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