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Jgs19
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Hey I'm a new time member but I hope to use this forum for my college Physics 2 class, anyways:
1. Question: Two charges are D = 2.5 m apart and lie on the x-axis. What must be the magnitude of the charge on the right one, Q2, (in C) so that the electric field is zero at x = 1.75 meters. Let Q1 be at the origin and have a charge 17 C.
2. Equations I'm using.
E(total)=E1+E2...
E=k*q/r^2
3. My attempt:
E1=(8.99E9)(17C) / (1.75^2) = 4.990E10
E2= k*Q / (1.75^2)
E(total) = E1 + E2
0 = E1+E2
-E1=E2
Q= (-4.990E10)(1.75^2) / (8.99E9)
Q= -16.9987
I've just learned electrical fields / coulombs law, for a problem like this I just need some explanation on what I'm doing wrong. I thing what the biggest problem is and confusing this is it initially is 2.5m apart but they want you to find it at 1.75m, I'm going to keep working but I feel like the 2.5 is relevant and I'm not using it. Thanks in advance.
1. Question: Two charges are D = 2.5 m apart and lie on the x-axis. What must be the magnitude of the charge on the right one, Q2, (in C) so that the electric field is zero at x = 1.75 meters. Let Q1 be at the origin and have a charge 17 C.
2. Equations I'm using.
E(total)=E1+E2...
E=k*q/r^2
3. My attempt:
E1=(8.99E9)(17C) / (1.75^2) = 4.990E10
E2= k*Q / (1.75^2)
E(total) = E1 + E2
0 = E1+E2
-E1=E2
Q= (-4.990E10)(1.75^2) / (8.99E9)
Q= -16.9987
I've just learned electrical fields / coulombs law, for a problem like this I just need some explanation on what I'm doing wrong. I thing what the biggest problem is and confusing this is it initially is 2.5m apart but they want you to find it at 1.75m, I'm going to keep working but I feel like the 2.5 is relevant and I'm not using it. Thanks in advance.