45 (a) A conducting bar that is l = 40 cm long can slide with negligible friction on two parallel conducting rails positioned at an incline of = 45°, as shown in figure (a). Initially, the bar is at rest in a magnetic field of magnitude B = 0.6 T. What is the speed of the bar after a time interval t?Write down an expression in terms g, and t. Show that the induced emf establishes a potential difference along the length of the bar that is given by AV = 5gBlt where g is the acceleration due to gravity, l is the length of the sliding conductor and B the magn assuming the speed of the bar is measured at the time t. field. For the above expression the induced emf is measured across the bar What is the magnitude of the induced emf after 1.5 s? d) Which end of the bar is at a lower potential, A or B? Give a reason for your answer
45 (a) A conducting bar that is l = 40 cm long can slide with negligible friction on two parallel conducting rails positioned at an incline of = 45°, as shown in figure (a). Initially, the bar is at rest in a magnetic field of magnitude B = 0.6 T. What is the speed of the bar after a time interval t?Write down an expression in terms g, and t. Show that the induced emf establishes a potential difference along the length of the bar that is given by AV = 5gBlt where g is the acceleration due to gravity, l is the length of the sliding conductor and B the magn assuming the speed of the bar is measured at the time t. field. For the above expression the induced emf is measured across the bar What is the magnitude of the induced emf after 1.5 s? d) Which end of the bar is at a lower potential, A or B? Give a reason for your answer
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(a)
A conducting bar that is l = 40 cm long can slide with negligible friction on two parallel conducting rails positioned at an incline of = 45°, as shown in figure (a). Initialy, the
bar is at rest in a magnetic field of magnitude B = 0.6 T.
What is the speed of the bar after a time interval t? Write down an expression in terms g, d and t.
Show that the induced emf establishes a potential difference along the length of the bar that is given by
AV = gBlt
where g is the acceleration due to gravity, l is the length of the sliding conductor and B the magnetic field. For the above expression the induced emf is measured across the bar
assuming the speed of the bar is measured at the time t.
(c) What is the magnitude of the induced emf after 1.5 s?
Which end of the bar is at a lower potential, A or B? Give a reason for your answer
(P)
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2021/11/26
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