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4 years ago

How much voltage must be applied across a 0.20 Ω wire in order to create a 30 A current? (Please show work for it too)

Physics

2 answers:

tester [92]4 years ago

7 0

Answer:

6 V

Explanation:

By ohm's law :

V = IR

V = 0.2 × 30 = 6 V

fredd [130]4 years ago

7 0

Answer:

V=6V

Explanation:

Use the equation I=V/R and solve for V then use V=IR plug in the numbers.

V=IR

V=30(0.2)

V=6V

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A solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. If this solenoid carries a current of 12 A, what is the mag

spin [16.1K]

Answer:

The magnitude of the magnetic field inside the solenoid is 1.5 × 10⁻²T

Explanation:

Given that,

Length = 40 cm

Radius = 0.040 cm

Number of turns = 400

Current = 12 A

We need to calculate the magnetic field

Using formula of magnetic field inside the solenoid

$B =\mu nIB =\mu\dfrac{N}{l}I$

Where, $\dfrac{N}{l}$ =Number of turns per unit length

I = current

B = magnetic field

Put the value into the formula

$B =4\pi\times10^{-7}\times\dfrac{400}{40\times10^{-2}}\times12B = 1.5\times10^{-2}\ T$

Hence, The magnitude of the magnetic field inside the solenoid is 1.5 × 10⁻²T

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3 years ago

Which is an example of a chemical change?

KonstantinChe [14]

Which is an example of a chemical change?

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

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4 years ago

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Trevor skis down a hill at a speed of 25 m/s. Friction slows him down to a

Burka [1]

Answer:

A. Diagram A

Explanation:

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3 years ago

What happens when infrared hits a shiny surface

saw5 [17]