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Answer on Electromagnetism Question for kola

Question #55899
What is the self - inductance of an air-core solenoid, 1m long and 0.05m in diameter, if it has 1400 turns?

17 Which of the following is NOT correct?
A changing electric field can produce a changing magnetic field
A steady magnetic field produces a steady current
A changing magnetic field can produce a changing current
A changing magnetic field can produce a steady electric field

18 A rectangular coil of dimensions 20cm by 15cm lies with its plane parallel to a magnetic field of
. The coil, carrying a current of 10A experiences a torque of 4.5Nm in the field. How many loops has the coil?

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