Answer:
The potential difference across iron wire is 133.95 V
Solution:
As per the question:
Length, l = 2.97 m
Diameter. d = 0.88 mm =
Voltage, V = 157 V
Now,
We know that the resistivity of iron,
Resistivity of copper,
Now,
The potential difference across the iron wire:
V' =
V' =
Answer:
5.69 m/s.
Explanation:
The given data is as follows.
Magnetic field strength (B) = 0.65 T
Speed (v) = 4.2 m/s
Induced emf (E) = ?
Formula for emf induced at the ends of the rod of length L which is moving with a speed of v is as follows.
E = BvL
Putting the given values into the formula as follows.
.
When magnetic field is changed to
Now, we assume that the speed be to get the emf
Then,
we can conclude that the speed v of the rod be adjusted to reestablish the emf induced between the ends of the rod at its initial value is 5.69 m/s.
A grandfather paradox is a situation where individual travels to the past and then introduces a change which affects or contradicts the present.
<h3>What is a grandfather paradox?</h3>
A paradox is a situation or statement which involves two contradictions.
A grandfather paradox is a situation which is defined by the ability of an individual to travel to a time in the past usually before the birth of their grandfather and then introduces a change which affects or contradicts the present. For example, killing the grandfather to prevent their birth.
In conclusion, a grandfather paradox is is an event which contradicts the present as a result of a change done to the past.
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The y component of the vector is 37.7 N and the angle between the vectors is 26.2⁰.
<h3>Y-component of the vector</h3>
The y component of the vector will be determined from the resultant vector and the x component of the vector.
R² = Y² + X²
Y² = R² - X²
Where;
- Y is the y-component of the vector
- X is the x component of the vector
- R is the resultant vector
Y² = 85.2² - 76.4²
Y² = 1,422.08
Y = √1,422.08
Y = 37.7 N
<h3>Angle between the vectors</h3>
θ = arc tan (Y/X)
θ = arc tan (37.7/76.4)
θ = 26.2⁰
Thus, the y component of the vector is 37.7 N and the angle between the vectors is 26.2⁰.
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