BITSAT PYQs for Electric Field with Solutions: Practice BITSAT Previous Year Questions

1.

Which one of the following graphs represents the variation of electric field with distance $r$ from the center of a charged spherical conductor of radius $R$?

2.

The displacement of a charge $Q$ in the electric field $E=e_{1} 1+e_{2} j+e_{3} k$ is $r=a i+b j$. The work done is

• $Q (ae_1 + be_2)$
• $Q \, \overline {{ae_1 } ^2 + {be_2 }^2}$
• $Q(e_1 + e_2)\,\, \overline{a^2 + b^2}$
• $Q \overline{e_1^2 + e_2^2} \,\,a + b$

3.

An electric line of force in the $xy$ plane is given by equation $x^2 + y^2 = 1$. A particle with unit positive charge, initially at rest at the point $x = 1, y = 0$ in the $xy$ plane

• not move at all
• will move along straight line
• will move along the circular line of force
• information is insufficient to draw any conclusion

4.

The magnitude of electric field intensity $E$, such that an electron placed in it would experience an electrical force equal to its weight, is given by

• $m\,g\,e$
• $\frac{mg}{e}$
• $\frac{e}{mg}$
• $\frac{e^2}{m^2} g $

5.

Electric field in a certain region is given by \( \vec{E} = \left( \frac{A}{x^2} \hat{i} + \frac{B}{y^3} \hat{j} \right) \). The SI unit of A and B are:

• Nm\(^3\)C\(^{-1}\); Nm\(^2\)C\(^{-1}\) 
   

• Nm\(^2\)C\(^{-1}\); Nm\(^3\)C\(^{-1}\) 
   

• Nm\(^3\)C; Nm\(^2\)C
  
• Nm\(^2\)C; Nm\(^3\)C