PHYSICS HIGH SCHOOL

The expression that relates emf, potential, current, and resistance is Ohm's law.True or
False

Answers

Answer 1
Answer:

Answer:

This expression is True

Since the Ohm's Law "states that the current )I) through a material between two points is proportional to the voltage across the two points." and i defined by this formula:

V = IR

Where V represent the voltage and it's a value related to the emf and the potential

I represent the current

R represent the resistance.

And for this case we have an expression for this case relating the emf , potential, current and resistance

Explanation:

This expression is True

Since the Ohm's Law "states that the current )I) through a material between two points is proportional to the voltage across the two points." and i defined by this formula:

V = IR

Where V represent the voltage and it's a value related to the emf and the potential

I represent the current

R represent the resistance.

And for this case we have an expression for this case relating the emf , potential, current and resistance

Answer 2
Answer: Ohms law:
V = IR The relationship between electrical resistance, current, and voltage is defined by the mathematical relationship V= IR and is referred to as Ohm's law. In this equation "V" stands for voltage, measured in volts, "I" stands for current, measured in amperes, and "R" stands for resistance, measured in Ohms (Ω ).Common sources of voltage in circuits may be chemical cells (a battery is a combinations of cells) and generators. Sources of electrical resistance in circuits may include resistors, light bulb filaments, wire conductors and other electric devices. When solving Ohm's law problems you are expected to solve for any unknown variable.
Example: Determine the voltage of the circuit shown below in diagram "A".Diagram A In this circuit we are given the current from the ammeter .2A. We also can determine the resistance. Since this is a series circuit the total resistance is the sum of the resistances of L1 and L2, 70Ω . We set the problem up and solve it like this.
V=IR
V=.2A 70Ω
V= 14VThe answer is 14V

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Which term best describes the important pieces of information that scientists gather and record during an experiment?

Answers

Data. Anything a scientist measures or records for an experiment is considered data, very important information.

If frequency is kept constant, how are the velocity and wavelength of a wave related?

Answers

Answer;

Velocity and wavelength are directly proportional when frequency is kept constant.

Explanation;

  • Frequency of a wave is the number of complete oscillations made by a given wave in one second.
  • Wavelength on the other hand, is the distance between two successful crests or troughs in a transverse wave or two successful rarefactions or compressions in a longitudinal waves.
  • The speed of a wave is given by the product of the frequency of a wave and the wavelength.
  • Speed = Frequency × wavelength,
  • Therefore, if frequency is kept constant, then the speed of a wave is directly proportional to the wavelength, such that an increase in wavelength increases the speed of the wave and vice versa.

The effects of agriculture and industry can be more harmful with the further loss of wetlands.

Answers

Yes, it is true that the effects of agriculture and industry can be more harmful with the further loss of wetlands since industry usually requires large amounts of land. 

Answer:trueeeeeeeeee

Explanation:

Which of the following is explained by general relativity? A. How massive stellar objects can form a lens. B. Why moving muons decay more slowly than stationary ones
C. Why atomic clocks tick more slowly when in motion
D. Why no object can move faster than light through space-time

Answers

The correct answer is both c and d. In general relativity, it explains why atomic clocks tick more slowly when in motion and why no object can move faster than light through space-time. The theory of relativity was formulated by Albert Einstein. 

Green light has a lower frequency than blue light. Which color of light has a longer wavelength?

Answers

Although green light has a lower frequency than the blue light, but green light has the longer wavelength than the wavelength of blue light. The wavelength of green light is longer by a small margin than the wavelength of the blue light. Red light has the highest wavelength among all the available colors of light. Any color of light is nothing but an electromagnetic wave that enables us to see things around us. Humans mostly can see wavelengths between the Electromagnetic spectrum and the Ultra violet region.


Answer:

purple

Explanation:

During a thunder storm, movement of water molecules within clouds creates friction which causes the bottom of the clouds to become negatively charged. This means that the bottom of the cloud and the ground begin to act like parallel plates. Once the electric field between the clouds and the ground becomes larger than 3.0 x 10^6 N/C, lightning will strike. a. If the bottom of the cloud is 150 m above the ground, determine the electric potential difference between the ground and the cloud.

Answers

the distance between the charges, or so called infinite charge plates is 150 m, the magnitude of the electric field is 3 x 10^6 N/C and we need to find the voltage, or potential energy, the electric field magnitude is defined as:

E = V/d

therefore, the potential is:

V = E * d

so we have:

V = 3 x 10^6 * 150 = 450 x 10^6 J/C (or volts)

that is the electrical potential difference.
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