- Exam
- JEE Advanced
- Year
- 2014
- Paper
- Paper 2
- Subject
- Physics
- Chapter
- Electrostatics
JEE Advanced 2014 · Paper 2 · Physics · Electrostatics
Four charges Q _ 1 , Q _ 2 , Q _ 3 and Q _ 4 of same magnitude are...
Four charges and of same magnitude are fixed along the x axis at and , respectively. A positive charge q is placed on the positive y axis at a distance . Four options of the signs of these charges are given in List I. The direction of the forces on the charge q is given in List II. Match List I with List II and select the correct answer using the code given below the lists.
| List I | List II | ||
| A. | all positive | ||
| B. | positive; negative | Q. | |
| C. | positive; negative | ||
| D. | positive; negative |
Options
- Aa-r;b-p;c-q;d-s;
- Ba-q;b-s;c-r;d-p;
- Ca-s;b-q;c-r;d-p;
- Da-r;b-p;c-s;d-q;
Correct answer
D. a-r;b-p;c-s;d-q;
Step-by-step solution
P: By and and F is in +y
Q: By and and F is in +ve x.
R: By and , F is in +ve y
By and , F is in -ve y
But later has more magnitude, since its closer to (0, b). Therefore net force is in - y
S: By and , F is in +ve x and by and , F is in -x, but later is more in magnitude, since its closer to (0, b). Therefore net force is in -ve x.