Standard Books Physics Electric Charges and Fields Class 12 Questions

A cup contains 250 g of water. Find the total positive charge present in the cup of water.

The number of electrons that must be removed from an electrically neutral silver dollar to give it a charge of +2.4 C is

Figure shows the electric field lines around three point charges A, B and C. Which of the following charges are positive?

In the previous question, in which charge has the largest magnitude?

A non-uniform electric field is represented by the diagram. At which of the following points the electric field is greatest in magnitude?

Which of the following curves represent electric field lines correctly?

Which of the following statements is not true about electric field lines?

A sphere encloses an electric dipole within it. The total flux across the sphere is

The total flux through the faces of the cube with side of length a, if a charge q is placed at corner A of the cube is

An electric dipole is placed at an angle of 30° with an electric field of intensity 2 × 10⁵ N C⁻¹. It experiences a torque equal to 4 N m. The charge on the dipole if the dipole length is 2 cm is

Assertion: In a uniform electric field electrons move in the opposite direction of electric field. Reason: This is because of the negative charge of an electron.

A metallic solid sphere is placed in a uniform electric field. Which path, the lines of force follow as shown in figure?