Voltage must decrease by a factor of 3 to reduce the current in the resistor by a factor of 3
Answer: Option A
<u>Explanation:</u>
According to ohms law, the voltage passed in a circuit will be directly proportional to the current flow in the circuit. So the resistance of the resistor will act as proportionality constant in ohms law. Let us consider V as original voltage producing a current I in resistor of resistance R. Then according to ohms law:
Now the revised current flow in the circuit is reduced by a factor of 3, So the new current is in the same resistance R, then the new voltage will be
So, the voltage must be reduced by a factor of 3 to reduce the current in the resistor by a factor of 3.
Y → Z → X → W
Explanation:
W = 6
X = 5
Y = 1
Z = 3
A convenient scale for expressing the level of acidity or alkalinity of aqueous solutions is the pH or pOH scale.
- The pH of a solution is the negative logarithm to base 10 of the hydrogen ion concentration of the solution.
- The pH scale ranges from 1 to 14 in which case 1 is the lower limit and 14 is the upper limit.
- An acidic solution has a pH value less than 7
- Neutral solutions have pH of 7
- Bases have pH greater than 7
Learn more:
Acidity brainly.com/question/5121777
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Answer:
It is used in MRI because it does not damage cells
Radio waves are used for space research because they have very long wavelengths
Explanation:
Many parts of the electromagnetic spectrum are applied in clinical diagnosis and treatment of illnesses. However, these highly ionizing radiation damage cells and its dosage must be carefully managed to avoid creating radiation related health problems for the patients.
Radio waves can be used in MRI without issues because the energy of the radiation is not sufficient to cause damage to cells but is sufficient to provide images for the sake of medical diagnosis.
Secondly, radio waves have long wavelength. This property is suitable for long range
communication. Hence it can be used in space research
Answer:
The maximum temperature is 90.06° C
Explanation:
Given that
t= 0.1 mm
Heat generation
Heat transfer coefficient
Here one side(left side) of the wall is insulated so the all heat will goes in to right side .
The maximum temperature will at the left side.
Lets take maximum temperature is T
Total heat flux ,q
So the total thermal resistance per unit area
R=0.002 K/W
We know that
q=ΔT/R
30=(T-90)/0.002
T=90.06° C
The maximum temperature is 90.06° C