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Svetlanka [38]
3 years ago
7

The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of posi

tive charge is often called the __________ model. (Points : 1)
electron cloud

raisin bread

molecular

nuclear
Physics
2 answers:
kirza4 [7]3 years ago
8 0
Electrons trapped in a mass of positive charge is often called the raisin bread model
irina [24]3 years ago
5 0
That type of model was called the raisin bread model, founded by JJ Thompson.
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Resistor is made of a very thin metal wire that is 3.2 mm long, with a diameter of 0.4 mm. What is the electric field inside thi
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Complete question:

Resistor is made of a very thin metal wire that is 3.2 mm long, with a diameter of 0.4 mm. What is the electric field inside this metal resistor? If the potential difference due to electric field between the two ends of the resistor is 10 V.

Answer:

The electric field inside this metal resistor is 3125 V/m

Explanation:

Given;

length of the wire, L = 3.2 mm = 3.2 x 10⁻³ m

diameter of the wire, d = 0.4 mm = 0.4 x 10⁻³ m

the potential difference due to electric field between the two ends of the resistor, V = 10 V

The electric field inside this metal resistor is given by;

ΔV = EL

where;

ΔV is change in electric potential

E = ΔV / L

E = 10 / (3.2 x 10⁻³ )

E = 3125 V/m

Therefore, the electric field inside this metal resistor is 3125 V/m

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