A 0.97 V potential difference is maintained across a 1 m length of tungsten wire that has a cross-sectional area of 0.86 mm2 . What is the current in the wire? The resistivity of the tungsten is 5.6 × 10−8 Ω · m . Answer in units of A.

The current throught the wire has a value of 15 A.

Explanation:

We can use Ohm's second law to find the resistance of the wire and then use his first law to find the current in it.

Ohm's second law is given by:

R = (p*l)/A

Where R is the resistance of the wire, A is the area of the cross-sectional, l is the length of the wire and p is the resistivity of the material.

R = [1*5.6*10^(-8)]/(0.86*10^(-6)) = 6.51*10^(-2) Ohms

Ohm's first law is given by:

I = V/R

Where I is the current through the wire, V is the voltage drop across it's terminals and R is it's resistance. We have:

I = 0.97/[6.51*10^(-2)] = 0.15*10^(2) A = 15 A

The current throught the wire has a value of 15 A.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement