Answer to Question #25651 in Electric Circuits for dellu
Suhasini’s uncle is advised by his doctor to have an MRI scan on his chest. Her uncle did not know much about the details and the significance of this test. He also felt that it was too expensive and thought of postponing it.
When suhasini learnt about her uncle’s problems, she immediately decided to do something about it. She took the help of her family, friends and neighbours and arranged for the cost of the test. She also told her uncle that an MRI (Magnetic Reasonance Imaging) scan of his chest would enables the doctors to know the condition of his hearts lungs without causing any( test related) harm to him. This test was expensive because of its set up that needs strong magnetic field ( 0.5T to 3 T) and pulses of radio wave energy.
Her uncle was convinced and had the required MRI scan of his chest done. The resulting information greatly helped his doctors to treat him well.
(a) What according to you are the values displayed by suhasini and her family, friends and neighbours to help her uncle ?
(b) Assuming the MRI scan of his uncle’s chest was done by using a magnetic field of 1T . Find the maximum and minimum value of the force exerted by the magnetic field on a proton that was moving at a speed of 104 m/sec. State the condition under which this force has minimum value.
(a) Presence of mind High degree of general awareness Ability to take prompt decisions Concern for her uncle (Any two) Empathy: Helping and caring nature (b) Maximum force = qvB = 1.6 x 10^-19 x 10^4 x 1N = 1.6 x 10^-15 N Minimum force = zero