A balloon rubbed against a pair of jeans gains a charge of -6x10^-6 C. If the balloon is moved to a distance of 0.25 m away from the jeans, what is the size and direction of the electric force between the balloon and jeans ?

5.184 N

Explanation:

Given

The charge on the balloon is

distance between balloon and jeans is

After rubbing jeans must acquire the same opposite charge i.e.

The electrostatic force between them

nature of force will be attractive i.e. Jeans will try to pull the balloon

0.55x745.7j and a calculator

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27