Answer:
0.35 T
Explanation:
Side, a = 0.132 m, e = 27.1 mV = 0.0271 V, dA / dt = 0.0785 m^2 / s
Use the Faraday's law of electromagnetic induction
e = rate of change of magnetic flux
Let b be the strength of magnetic field.
e = dФ / dt
e = d ( B A) / dt
e = B x dA / dt
0.0271 = B x 0.0785
B = 0.35 T
Explanation:
Given that,
Potential difference, V = 412 V
Magnitude of magnetic field, B = 188 mT
(a) The potential energy of electron is balanced by its kinetic energy as :
v is speed of the electron
(b) When the charged particle moves in magnetic field, it will move in circular path. The radius of the circular path is given by :
Hence, this is the required solution.
Answer: rotational force
Explanation:
Torque is the twisting force which cause rotation and the axis of rotation is the point at which the object rotates.
Torque is a rotational force as it leads to the rotation of an object about an axis. Force simply means a pull or push. When an unbalanced ball acts on a force, the ball, the ball will be moved towards the linear motion.
Then, the unbalanced force that is acting in the ball produces torque which causes the ball's rotational motion.
Answer:
Option D
The system gains heat and has work done on it by the surroundings.
Explanation:
Considering that any system that processes anything leads to an increment in the energy within the system. This implies that the system has to absorb more heat either from the surrounding or external sources and the work done on the surrounding, Therefore, option D is correct by saying that the system gains heat and has work done on it by the surroundings.
