Generating a maximum emf
Twenty loops of wire having a radius of 7.5 cm rotates around a diameter in the uniform magnetic field of 1.6 T. To generate a maximum emf of around 20.0 V, it must rotate at:
(i) 0
(ii) 2.7 rad/s
(iii) 5.6 rad/s
(iv) 35 rad/s
(v) 71 rad/s
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A dipole having dipole moment of 1.5 nC*m is oriented at 30 degrees to an electric field, 4.0*10^6 N/C. (i) Find out the torque on the dipole? (ii) Determine how much work is needed to rotate the dipole till it is parallel to the field.
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Two independent random samples of size n1 = 24 and n2 = 20 are taken from the two normal populations. The sample means are x1-bar = 220 and x2-bar = 240. The variances are sigma1^2 = 15 and sigma2^2 = 18. Find the following:
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