Question

1). Physics ). . Place a positive and negative charge on the same y value, with different x-values.How does the field behave?. Does the field ever point only in the x or y

direction? Where does that occur in relation to the point charge?.

2). Open Charges and field simulation ( https://goo.gl/fHg5tj). Once the simulation opens, check the box next to Grid and next to values.

3). Place a single positive point charge in the simulation, and use an E-field sensor ( yellow balls) to measure the magnitute and direction of the electric field. How does the field change as you move away from the charge?

4).Now place a negative charge in the grid. How does the E-field change? What is similar and different to its behavior with the positive charge?

Answer 1

1)

when the both positive and negative charges are placed so that both having same y value and different x value  

the field is the sum of the two charges fields at every point

but the field lies along x or y directions along the line joining the two charges only that too along x direction

because we know that the electric field lines are radially either inward or out ward for the -ve and +ve charges so the field lines for the combination of two charges will be in all directions (radial) starting ffrom +ve charge and ends at -ve charge like loops .

2) The box show the potential at that point if it is at -ve charge sides shows the potential at that point and if it is +ve charge side it shows the +ve potential and becomes zero at farther distance from the charges

3)Positive point charge and

the sensorindicating the electtric field strength at different points from the charge

the direction is radially out ward and showing the magnitude also

when the sensor is near the charge showing the arrow with larger magnitude and radially outward when the sensor is farther distance from the charge the arrow becomes smaller and smaller become zero at infinity

4) same way as that of +ve charge , but the direction of the arrow mark is radially inward

when the sensor is near the charge showing the arrow with larger magnitude and radially inward when the sensor is farther distance from the charge the arrow becomes smaller and smaller become zero at infinity