2 years ago

Why doesn't a transformer work with direct current? why is ac required?

1 answer:

4 0

The electric field depends not on the magnetic field, but change in magnetic field. if the magnetic field is constant. electric field will be zero.

More questions in the image.

Tamiku [17]

True, they represent the direction of motion

8 0

3 years ago

An air bubble underwater has the same pressure as that of the surrounding water. As the air bubble rises toward the surface (and

goldenfox [79]

Answer:

D Remains constant

Explanation:

3 0

3 years ago

A force of 20 N is exerted by an electric field on a test charge of 8.0 x 10² C at a point, P. What is the electric field streng

kenny6666 [7]

Answer:

the answer is equal to 1.6N/C

5 0

2 years ago

1. A 4-N force is used to move an object 2 m in 10 s. Which of the following is the power generated while moving the object?

guajiro [1.7K]

Power is the work done per unit time. Therefore,

$\begin{gathered} p=\frac{w}{t} \\ \text{where} \\ w=\text{work done} \\ t=\text{time} \end{gathered}$

Therefore,

$\begin{gathered} \text{work done=fd} \\ f=force=4N \\ d=\text{displacement}=2m \\ t=2\sec s \\ p=\frac{fd}{t}=\frac{4\times2}{10}=\frac{8}{10}=0.8watts \end{gathered}$

4 0

1 year ago

Based on its location on the periodic table, which element is a metal?

goldfiish [28.3K]

Sodium (Na) is a Alkali metal so that's the answer

6 0

2 years ago

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