A conducting coil of 1850 turns is connected to a galvanometer, and the total resistance of the circuit is 30 Ω. The area of each turn is 4.00 × 10-4 m2. This coil is moved from a region where the magnetic field is zero into a region where it is nonzero, the normal to the coil being kept parallel to the magnetic field. The amount of charge that is induced to flow around the circuit is measured to be 8.0 × 10-3 C. Find the magnitude of the magnetic field.
Answers
Answer:
0.324 T
Explanation:
Parameters given:
Number of turns, N = 1850
Resistance, R = 30Ω
Area of each turn, A =
Charge in the circuit, q =
The induced EMF in the coil is given as:
EMF is also given in terms of current, I, and resistance, R, as:
V = IR =
=>
Charge, q, is the product of current and time. Hence:
It = q
=>
Hence, magnetic field, B, will be:
The magnitude of magnetic field, |B| will be |-0.324| = 0.324 T
Related Questions
Gravitational potential energy is a form of potential energyA.) caused by gravity alone. B.) caused by gravity and that depends on an object's position and mass. C.) caused by gravity and that depends on an object's mass, but not its position. D.) caused by gravity and that depends on an object's position, but not its mass.
A long coaxial cable consists of an inner cylindrical conductor with radius a and an outer coaxial cylinder with inner radius b and outer radius c. The outer cylinder is mounted on insulating supports and has no net charge. The inner cylinder has a uniform positive charge per unit length λCalculate the electric field (a) At any point between the cylinders a distance r from the axis and (b) At any point outside the outer cylinder. (c) Graph the magnitude of the electric field as a function of the distance r from the axis of the cable, from r = 0 to r = 2c. (d) Find the charge per unit length on the inner surface and on the outer surface of the outer cylinder.
An explosion that destroys a massive star is called a A. nebula. B. supernova. C. black hole. D. vacuum.
A coin is placed in an empty beaker. When a transparent liquid is poured into the beaker, the apparent depth of the coin is found to be 40% less than the real depth. What is the refractive index of the liquid? The options for the answer are 0.4 / 0.6 / 1.2 / 1.7
Answers
Answer:
Explanation:
The moment of inertia is the integral of the product of the squared distance by the mass differential. Is the mass equivalent in the rotational motion
a) True. When the moment of inertia is increased, more force is needed to reach acceleration, so it is more difficult to change the angular velocity that depends proportionally on the acceleration
b) True. The moment of inertia is part of the kinetic energy, which is composed of a linear and an angular part. Therefore, when applying the energy conservation theorem, the potential energy is transformed into kinetic energy, the rotational part increases with the moment of inertia, so there is less energy left for the linear part and consequently it falls slower
c) True. The moment of inertial proportional to the angular acceleration, when the acceleration decreases as well. Therefore, a smaller force can achieve the value of acceleration and the change in angular velocity. Consequently, less force is needed is easier
Final answer:
d. The lower the moment of inertia, the slower something will roll down an incline - this is the option that is NOT true. Objects with lower moments of inertia roll down inclines faster, not slower because they resist changes to their rotation less.
The correct statement that is NOT true among the provided options is: d.
Explanation:
The correct statement that is NOT true among the provided options is: d. The lower the moment of inertia, the slower something will roll down an incline.
The moment of inertia, often denoted by 'I', is essentially the rotational equivalent of mass for linear motion. It is a property of a body that measures its resistance to angular acceleration, which is its change in angular velocity.
- a. True - The higher the moment of inertia, the greater the resistance to changes in angular velocity, because a body with a larger moment of inertia (mass concentrated farther from the axis of rotation) requires more torque to change its rotational speed.
- b. True - The higher the moment of inertia, the slower something will roll down an incline. This is because an object with a greater moment of inertia will resist rolling down the incline more than one with a lower moment of inertia.
- c. True - The lower the moment of inertia, the easier it is to change the angular velocity, as there is less mass resisting the change in rotation.
However, the claim in statement d is not correct as per the principles of rotational motion in physics. An object with a lower moment of inertia would actually roll down an incline faster, not slower, given the same amount of gravitational potential energy, since it has less resistance to changes in its rotational motion.
Learn more about Moment of Inertia here:
#SPJ3
Answers
B. Hold and feed the infant while you supervise the activity of the older children.
C. Have the older two children continue the project on their own while you feed the infant in a separate room.
D. Prop the infant's bottle in the crib so he or she can eat while you continue to help the older children
Answers
Answer: B. Hold and feed the infant while you supervise the activity of the older children.
Explanation: On one side, a two-month-old is too young to understand that he has to wait until you finish with your other activities so you are free to feed him. His needs are urgent. Of course he is also too young to take the bottle on his own. These are the reason why options A and D are incorrect. On the other side, the other two children also need your supervision. You have to take care of them and leave them alone is not a good option. This is why option C is incorrect. Taking all these things into account I find option B as the best answer.
Answers
Answer: D. relatively inexpensive and readily available
Fossil fuels are non-renewable sources of energy these resources formed by the geological processes occurring in the earth. It takes millions of years for their formation. These includes coal, petroleum, and natural gas. Unfortunately, the distribution of these resources is not even in the regions of the world but efforts have been done by the humans to make them available everywhere. They are relatively inexpensive and readily available this contributes to the majority of the world's energy use.
In short, Your Answer would be Option D
Hope this helps!
Answers
Answer:
When the masses drop, they move with the same angular velocity as you before hitting the ground. i.e., they leave your hand with their angular momentum. So, in one view, you can think the mass decreases, which means the moment of inertia also decreases. Therefore, the angular velocity should increase.