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3 years ago

Define the unit of current. Name the device which is used to measure

Physics

1 answer:

Free_Kalibri [48]3 years ago

3 0

Answer:

The ampere, symbol A, is the SI unit of electric current. It is defined by taking the fixed numerical value of the elementary charge e to be 1.602 176 634 x 10-19 when expressed in the unit C, which is equal to A s, where the second is defined in terms of ΔνCs.

the device used to measure current in a circuit is ammeter

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The product of 14 and a cubed

olya-2409 [2.1K]

Answer:

14 × a^3

Explanation:

Product means multiplication

Cubed means to the power of 3

6 0

4 years ago

Read 2 more answers

On a 100m straight track, Zak runs to the 80m mark in 15s. He then runs back to the 20m in 10s. He then runs to the 100m mark in

drek231 [11]

Answer:

The total distance traveled by Zak is 250 m and total displacement is

70 m

Explanation:

Distance is a scalar quantity that represents how much ground an

object has covered during its motion

Displacement is a vector quantity that represents how far out of place

an object is, means the change in its position

Displacement = final position - initial position

The straight track is 100 m

Zak runs to the 80 m mark

That means he runs forward from zero to 80

Then his distance = 80 m

His displacement = + 80 m

He then runs back to the 20 m

That means that he runs back from 80 m to 20 m

Then his distance = 80 - 20 = 60 m

His displacement = 20 - 80 = -60 m

He then runs to the 100 m mark

That means he runs forward from 20 m to 100 m

Then his distance = 100 - 20 = 80 m

His displacement = 100 - 20 = + 80 m

Finally he runs to the 70 m mark

That means he runs back from 100 m to 70 m

Then his distance = 100 - 70 = 30 m

His displacement = 70 - 100 = - 30 m

His total distance is the sum of all distances he runs

The total distance = 80 + 60 + 80 + 30 = 250 m

His total displacements is the sum of all displacements he runs

The total displacement = (+80) + (-60) + (+80) + (-30) = + 70 m

The total distance traveled by Zak is 250 m and total displacement is

70 m

3 0

3 years ago

If you have 12 atoms of hydrogen before a chemical reaction how many atoms of hydrogen will be president after the chemical reac

kaheart [24]

If you have 12 atoms of hydrogen before a chemical reaction, the number of hydrogen atoms that will be present after the chemical reaction is 12 atoms.
The Law of Conservation of Mass (LOCOM) states that mass is neither created nor destroyed before and after any chemical reaction.
According to the Law of Conservation of Mass (LOCOM), a balanced chemical equation requires that the number of atoms on the reactant side must be equal to the number of atoms on the product side of any chemical reaction.
In this context, a chemical reaction having 12 atoms of hydrogen as reactants at the beginning, should also produce a total of 12 atoms of hydrogen as products at the end of the chemical reaction.

4 0

2 years ago

A ray of violet light has a wavelength of about 4.2×10−7 m. will exposure to violet light cause electrons to be emitted from ces

lesantik [10]

The wavelength of violet light is given as 4.2x10^-7 m and the speed of light is 3x10^8 m/sec

The equation relating between the frequency and the wavelength is as follows:
speed of light = wavelength x frequency

Substitute with the givens in the above equation to get the frequency of violet light as follows:
frequency = (3 x 10^8) / (4.2 x 10^-7) = 7.14285 x 10^14 Hz

The threshold frequency of cesium is 9.39x10^14 Hz.
Since the frequency of violet light is less than the threshold frequency of cesium, therefore, the exposure to violet light won't cause electrons to be emitted from cesium.

7 0

3 years ago

Now select the light bulb as the current indicator in the circuit. Move the magnet back and forth through the coil at different

nataly862011 [7]

Answer:

The magnitude of induced voltage varies with rate of change of magnetic field.

Explanation:

The experiment aims to demonstrate the principle of electromagnetic induction as shown by Michael Faraday. The intensity of the bulb is a physical indicator of the magnitude of induced voltage. A simple statement of Faraday's law of electromagnetic induction is that the induced voltage in a circuit is proportional to the rate of change over time of the magnetic flux through that circuit. This implies that, the faster the magnetic field changes, the greater will be the voltage in the circuit.

Moving the magnet at different rates implies changing the magnetic field hence the magnitude of induced voltage also changes accordingly. This change is indicated by changes in the brightness of the light bulb.

6 0

3 years ago