Two charges are separated by 3 meters and fixed in place, +1nC on the right and
ID: 2271598 • Letter: T
Question
Two charges are separated by 3 meters and fixed in place, +1nC on the right and -4nC on the left. If I were to move a third charge along the axis connecting them, where would this new particle experience no net force?
To the right of both fixed charges
Between the two fixed charges
To the left of both fixed charges
The equilibrium point depends on the sign and magnitude of the the mobile third charge.
Observing a small "test" charge (q=+3pC) near the surface of the Earth I note that it experiences a downwards force, leading me to conclude that the Earth's electric field is directed downwards.
If I instead measure the Earth's field using an equal-but-opposite test charge (q=-3pC), my observation and measurement will be:
A downwards force on the negative test charge, and a downwards electric field due to the Earth.
An upwards force on the negative test charge, and a downwards electric field due to the Earth.
An upwards force on the negative test chage, and an upwards electric field due to the Earth.
An downwards force on the negative test chage, and an upwards electric field due to the Earth.
To the right of both fixed charges
Between the two fixed charges
To the left of both fixed charges
The equilibrium point depends on the sign and magnitude of the the mobile third charge.
Explanation / Answer
1)
Between the two fixed charges
2)
An upwards force on the negative test charge, and a downwards electric field due to the Earth.
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