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4 years ago

Which term describes the rate at which electric energy is used?

Physics

2 answers:

nika2105 [10]4 years ago

6 0

Answer: Option B) Power

Explanation:

Power is the rate at which energy is expended per unit time. Hence, the rate at which electric energy is used is simply called electrical power.

Mathematically, the relationship between energy and power is:

Power = (Electrical energy /Time)

Hence, power consumption or electrical energy used in homes is rated in kilowatt per hour (kWh).

dem82 [27]4 years ago

3 0

Answer:

B.power

Explanation:

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A solid conducting sphere has net positive charge and radius r = 0.800 m . At a point 1.20 m from the center of the sphere, the

Serga [27]

here we have to calculate the net positive charge present on he surface of the conducting sphere.

as the sphere is a conducting one the,the charge will be stored on its surface.

though the charge is present at the surface,still it will behave just like the total charge is concentrated at the centre of the sphere.

the electric field at outside of the sphere is E= $\frac{1}{4\pi\epsilon} \frac{q}{r^2}$

as E= $\frac{-dv}{dr}$

so V= $\frac{1}{4\pi\epsilon} \frac{q}{r}$

here V=27 volt,radius of sphere is 0.800 m and the point at which the potential is considered is at 1.20 m from th centre of the sphere.hence the point is at the outside of the sphere .

hence we have 27= $\frac{1}{4\pi\epsilon} \frac{q}{1.20}$

q=27× $\frac{1}{9*10^{9} }* 1.20$ coulomb

=3.6× $10^{-9}$ coulomb [ans]

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4 years ago

If the mass of an object is 300kg and the applied force is 3900N, calculate the acceleration

Scilla [17]

F = ma
3900 = 300a
a = 3900÷300
a = 13m/s/s

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3 years ago