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Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015C placed in air of permittivity [Take K as 9.0 x 109Nm2C-2]
Which of the following indicates the correct sequence of steps taken in charging a gold-leaf electroscope by indication?
I. Removing the ebonite rod
II. Bringing a negatively-charged ebonite rod close to the cap
III. Earthing the cap
IV. Disconnecting the earthing
Which of the following instruments can be used to compare the relative magnitude of similar charges on two given bodies?
A point charge of 1.0 x 10-7C experiences a force of 0.01N in a uniform electric field. Calculate the magnitude of the strength of the field
The potential difference between two points A and B situated at a distance d apart is V. Which of the following expresses the magnitude of the electric field intensity between the two points assuming the field is uniform?