Answer:
The resulting magnetic field is 5.021 x 10⁻⁵ T
Explanation:
Given;
current in the lightening bolt, I = 11800 A
distance from the bolt, r = 47 m
permeability of free space, μ₀ = 1.25664 × 10⁻⁶ T· m/A
Assume lightening bolt as long straight conductor, then the resulting magnetic field will be calculated as follows;
where;
B is the resulting magnetic field
I is the current in the bolt
r is the distance from the bolt
Substitute the given values and calculate B
Thus, the resulting magnetic field is 5.021 x 10⁻⁵ T
It show how people work and what's they should for there living
Voltage - An electromotive force or potential difference expressed in volts.
Current - A flow of electricity which results from the ordered directional movement of electrically charged particles.
Answer: The correct answer is "The switch is closed, completing the circuit".
Explanation:
Electromagnet: It is a temporary magnet. When the iron rod is wounded by the coils and the current is passed through it then it becomes magnetized and behave like a temporary magnet as long as the current flows through it.
When you push the button of a doorbell then the circuit completes and the current starts flowing through the circuit. The electromagnet is activated.
It causes a buzzer to go off. The hammer strikes the bars which creates sound.
Therefore, the correct answer is "The switch is closed, completing the circuit".
Friction resists motion.
Friction is a contact force.
<span>Friction is caused by microscopic bumps and ridges on surfaces.
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