Three charges are placed at the vertices of an equilateral triangle of side ‘$a$’ as shown in the following figure. The force experienced by the charge placed at the vertex $A$ in a direction normal to $BC$ is
Three charges are placed at the vertices of an equilateral triangle of side ‘$a$’ as shown in the following figure. The force experienced by the charge placed at the vertex $A$ in a direction normal to $BC$ is
- [AIIMS 2003]
- A
${Q^2}/(4\pi {\varepsilon _0}{a^2})$
- B
$ - {Q^2}/(4\pi {\varepsilon _0}{a^2})$
- C
Zero
- D
${Q^2}/(2\pi {\varepsilon _0}{a^2})$
Similar Questions
Positive point charges are placed at the vertices of a star shape as shown in the figure. Direction of the electrostatic force on a negative point charge at the centre $O$ of the star is
Positive point charges are placed at the vertices of a star shape as shown in the figure. Direction of the electrostatic force on a negative point charge at the centre $O$ of the star is
- [KVPY 2017]
What is the force (in $N$) between two small charged spheres having charges of $2 \times 10^{-7} \;C$ and $3 \times 10^{-7} \;C$ placed $30\; cm$ apart in air?
What is the force (in $N$) between two small charged spheres having charges of $2 \times 10^{-7} \;C$ and $3 \times 10^{-7} \;C$ placed $30\; cm$ apart in air?
Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is $r.$ Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become
Two pith balls carrying equal charges are suspended from a common point by strings of equal length, the equilibrium separation between them is $r.$ Now the strings are rigidly clamped at half the height. The equilibrium separation between the balls now become
- [AIPMT 2013]
Why Coulomb’s law is associated with Newton’s $3^{rd}$ law ?
Why Coulomb’s law is associated with Newton’s $3^{rd}$ law ?
Explain the superposition principle for static electric forces and write its general equation.
Explain the superposition principle for static electric forces and write its general equation.