Conservation of energy explains that energy can only be transferred between different forms of energy
An insulator which is also called a 'dielectric'.
Star 1 - 4 hours right ascension
Star 2 - 3 hours right ascension
Subtracting hours right ascension
4 hours right ascension - 3 hours right ascension = 1 hours right ascension.
Thus,
star 1 will rise 1 hour before star 2
The truck would of went 150 miles
Answer:
The rate of change of magnetic field is 2.23 T/s.
Explanation:
Given that,
Dimension of rectangular coil is 7.2 cm by 3.7 cm.
Number of turns in the coil, N = 104
Resistance of the coil, R = 12.4 ohms
Current, I = 0.05 A
We need to find the rate of change of magnetic field in the coil. The induced emf is given by the rate of change of magnetic flux. So,
![\epsilon=-\dfrac{d\phi}{dt}](https://tex.z-dn.net/?f=%5Cepsilon%3D-%5Cdfrac%7Bd%5Cphi%7D%7Bdt%7D)
Ohm's law is :
![\epsilon=IR](https://tex.z-dn.net/?f=%5Cepsilon%3DIR)
So,
![IR=-\dfrac{d\phi}{dt}\\\\IR=-\dfrac{d(NBA)}{dt}\\\\IR=-NA\dfrac{dB}{dt}\\\\\dfrac{dB}{dt}=\dfrac{IR}{NA}\\\\\dfrac{dB}{dt}=\dfrac{0.05\times 12.4}{104\times 7.2\times 10^{-2}\times 3.7\times 10^{-2}}\\\\\dfrac{dB}{dt}=2.23\ T/s](https://tex.z-dn.net/?f=IR%3D-%5Cdfrac%7Bd%5Cphi%7D%7Bdt%7D%5C%5C%5C%5CIR%3D-%5Cdfrac%7Bd%28NBA%29%7D%7Bdt%7D%5C%5C%5C%5CIR%3D-NA%5Cdfrac%7BdB%7D%7Bdt%7D%5C%5C%5C%5C%5Cdfrac%7BdB%7D%7Bdt%7D%3D%5Cdfrac%7BIR%7D%7BNA%7D%5C%5C%5C%5C%5Cdfrac%7BdB%7D%7Bdt%7D%3D%5Cdfrac%7B0.05%5Ctimes%2012.4%7D%7B104%5Ctimes%207.2%5Ctimes%2010%5E%7B-2%7D%5Ctimes%203.7%5Ctimes%2010%5E%7B-2%7D%7D%5C%5C%5C%5C%5Cdfrac%7BdB%7D%7Bdt%7D%3D2.23%5C%20T%2Fs)
So, the rate of change of magnetic field is 2.23 T/s.