A conductor 1 cm in length is parallel to z-axis and rotates at a radius of 25 cm at 1200 rev/min as shown in Fig. Find the induced voltage if the radial field is given by 
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. The angular velocity of the rod is
ω = 
rad/s
= 40 π rad/s
Hence
v = r ω = 0.25 × 40 π m/s
= 10 π m/s
Induced electric field is
E = 
= 
= 5 π 
V/m
The induced amf is E = 
= 
5 π 
= – 5 × 10 –2 π V
The lower end of the conductor is positive w.r.t. the upper end (use Fleming's right hand rule).
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