All categories

2 years ago

What is the power of an electric with a current of 0.5 A and a voltage of 120 V ? The formula for power is P =IV

Physics

2 answers:

erica [24]2 years ago

8 0

Answer:

60 W

Explanation: I took the quiz

zaharov [31]2 years ago

7 0

Answer:

60Watts

Explanation:

Given parameters:

Current = 0.5A

Voltage = 120V

Unknown

Power = ?

Solution:

The power in the electric circuit is the product of current and voltage;

P = IV

Insert the given parameters and solve;

P = 0.5 x 120

P = 60Watts

You might be interested in

A long, straight, horizontal wire carries a left-to-right current of 40 A. If the wire is placed in a uniform magnetic field of

Drupady [299]

Answer:

$4.5\times 10^{-5} T$

Explanation:

We are given that

Current in wire=40 A

Magnetic field= $B_1=3.5\times 10^{-5}$ T( vertically downward)

We have to find the resultant magnitude of the magnetic field 29 cm above the wire and 29 cm below the wire.

According to Bio-Savart law, the magnetic field exerted by the wire at distance R is given by

$B_{wire}=B_2=\frac{\mu_0I}{2\pi R}$

We have R=29 cm= $\frac{29}{100}=0.29 m$

1 m=100 cm

Substitute the values in the given formula

$B_2=\frac{4\pi\times 10^{-7}\times 40}{2\times \pi\times 0.29}=\frac{2\times 40\times 10^{-7}}{0.29}=2.76\times 10^{-5} T$

The resultant magnetic field is given by

$B=\sqrt{B^2_1+B^2_2}$

Substitute the values then we get

$B=\sqrt{(3.5\times 10^{-5})^2+(2.76\times 10^{-5})^2}$

$B=4.5\times 10^{-5} T$

The resultant magnitude of magnetic field is same above and below the wire as it is at same distance.

The resultant magnitude of the magnetic field 29 cm below the wire= $4.5\times 10^{-5} T$

Hence, the resultant magnitude of the magnetic field 29 cm above the wire= $4.5\times 10^{-5} T$

7 0

2 years ago

A 55.0-g piece of copper wire is heated, and the temperature of the wire changes from 19.0°C to 86.0°C. The amount of heat absor

Alinara [238K]

The specific heat of a metal or any element or compound can be determined using the formula Cp = delta H / delta T / mass. delta pertains to change. That is change in enthalpy and change in temperature. From the given data, Cp is equal to 343 cal per (86-19) c per 55 grams. This is equal to 0.093 cal / g deg. Celsius

4 0

2 years ago

Which of the following rivers flows north in eastern Florida?

Zarrin [17]

St. John’s

_________

o0o0o0o0o0

6 0

1 year ago

Will mark brainliest! Please help!

djverab [1.8K]

Answer:

30 seconds

Explanation:

A = A02^-(t/hl)

--> ln(A/A0) = -(t/hl)ln2

solving for hl,

hl = -t x ln2 /ln(A/A0)

= -(60 min)xln2/ln(50/200)

= 0.5 min or 30 seconds

3 0

2 years ago

crushing chalk into powder is and irreversible change. is this example a physical or chemical change?Why?

MA_775_DIABLO [31]

Answer:

It is a example of physical change

5 0

2 years ago