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chubhunter [2.5K]
3 years ago
13

A current of 0.2 A flows through an electric bell having a resistance of 65 ohms. What must be the applied voltage in the circui

t?
Physics
1 answer:
Zolol [24]3 years ago
5 0

Now we know by Ohm's law that


Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.


Introducing the constant of proportionality, the resistance,the Ohm's law can be mathematically represented as


V=I x R


Where V is the voltage measured in volts


I is the current measured in amperes


R is the resistance measured in ohms



Given:


I = 0.2 A


R= 65 ohms


Now substituting the values in Ohm's law we get


V = I x R


V = 0.2 x 65



V = 13 volts


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6 0
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Complete Question

When you ascend or descend a great deal when driving in a car yours ears "pop," which means that the pressure behind the eardrum is being equalized to that outside. If this did not happen, what would be the approximate force on an eardrum of area .50 cm2 if a change in altitude of 950 m takes place?

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=>    F    = \rho * g *  \Delta d  *  A

Here \rho is the density of dry air with value  \rho =  1.29 \ kg /m^3

So

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