How to Visualize Electric Fields

Q.

Consider the situation shown in figure. What are the signs of $q_{1}and{q}_2$?

1. Both positive

2. both negative

3. $q_1$ is positive and $q_2$ is negative

4. $q_1$ is negative and $q_2$ is positive

Q. The gravitational field in a region is given by E=(2i+3j)N/kg.The equation of the line on which no work is done by the gravitational when the particle is moved

Q. why tension is a non conservative force

Q. a thin rod is bent to form a semicircle.the mass of rod is M. what will be the gravitational potential at the centre of the circl

Q. In a region, electric potential varies with position $x$ as $V=4x^2$. The magnitude of electric field at $x=2\text{m}$ is

1. $16\text{V/m}$
2. $9\text{V/m}$
3. $32\text{V/m}$
4. $2\text{V/m}$

Q. The work done in moving a particle from (1, 1) to (2, 3) in a plane in force field with potential U=k(x+y) is

Q. Electric potential in a region is varying according to the relation $V=\frac{3x^2}{2}-\frac{y^2}{4}$ , where $x$ and $y$ are in $\text{meter}$ and $V$ is in $\text{volt}$. Electric field intensity in $\text{N/C}$ at a point $(1\text{m},2\text{m})$ is

1. $-6\hat{i}+2\hat{j}$
2. $3\hat{i}-\hat{j}$
3. $-3\hat{i}+\hat{j}$
4. $6\hat{i}-2\hat{j}$

Q.

If the lines are drawn in proportion to the charge, what is the ratio $\frac{q_1}{q_2}$?

1. $\frac{3}{8}$

2. $3$

3. $\frac{1}{6}$

4. cannot be said

Q. Three positive charges of equal value q are placed at the vertices of an equilateral triangle. The resulting lines of force should be sketched as in

1. 
2. 
3. 
4. 

Q.

In the given electric field line representation, can we say that the electric field at point B is zero because there are no electric field lines passing through B?

1. Yes

2. No

Q. The wrong statement about electric lines of force is

1. These originate from positive charge and end on negative charge
2. They do not intersect each other at a point
3. They have the same form for a point charge and a sphere
4. They have physical existence

Q. The gravitational field in a region is given by, {\overline E=(α^ i+3^ j)N/kg . Work done by gravitational field is zero, when a particle is moved along line {3y+4x=5 . Value of α is

Q. a particle is moved on a line 4y+3x=5 in the gravitational field given by i = 3 i + 4 j work done in moving the particle through 10m on the line is

Q. 7.The gravitational field in a region is given by E=(2i+3j)N/kg.The equation of the line on which no work is done by the gravitational when the particle is moved