Electric Charge MCQ Level - 2 - Physics MCQ

The correct answer is: can never be negative

The correct answer is: It will execute SHM

Electric flux has SI units of volt metres (V m), or, equivalently, newton metres squared per coulomb (N m² C⁻¹). Thus, the SI base units of electric flux are kg·m³·s⁻³·A⁻¹

a) Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions in the atmosphere or ground temporarily equalize themselves, causing the instantaneous release of as much as one gigajoule of energy.

b) The charge at the bottom of the clouds and those induced on the top of the roofs of buildings form a very strong electric field.

c) Lightning causes thunder, a sound from the shock wave which develops as gases in the vicinity of the discharge experience a sudden increase in pressure. 

The correct answer is: Positively charged and at earth potential

1 and 3 are the preventive measures to stay safe from lightning

For finding the net charge we will add all the charges on all spheres. 

= +5C + (-2C) + (+3C) + (-4C) + (2C)

The correct answer is: +4C

The correct answer is: After some time, Q is still neutral

The correct answer is: Such that the potential energy of the system is minimised