SATHEE: Electro Magnetic Induction And Alternating Currents Question 442

Electro Magnetic Induction And Alternating Currents Question 442

Question: A rectangular coil of 300 turns has an average area of average area of $25 c m \times 10 c m .$ The coil rotates with a speed of 50 cps in a uniform magnetic field of strength $4 \times 10^{- 2} T$ about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt) [KCET 2004]

Options:

A) $3000 π$

B) $300 π$

C) $30 π$

D) $3 π$

Show Answer

Answer:

Correct Answer: C

Solution:

Peak value of $e m f = e_{0} = ω N B A = 2 π ν N B A$ $= 2 π \times 50 \times 300 \times 4 \times 10^{- 2} \times (25 \times 10^{- 2} \times 10 \times 10^{- 2})$ $= 30 π v o l t$

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Electro Magnetic Induction And Alternating Currents Question 442

Question: A rectangular coil of 300 turns has an average area of average area of 25 cm×10 cm. The coil rotates with a speed of 50 cps in a uniform magnetic field of strength 4×10−2T about an axis perpendicular of the field. The peak value of the induced e.m.f. is (in volt) [KCET 2004]

Options:

Answer:

Solution:

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