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

= 27Ω

Explanation:

The voltage of a device =  Resistance × Current

                                         V=RI

Making R the subject of the formula we have R= V/I  

Thus resistance = Voltage/ Current

V= 81 V

I = 3 A

Using these values in the formula for resistance we can then find the resistance of the device as follows.

R = 81 V/ 3 A

= 27Ω

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

i think its 100.

hope this !