Neco 2021 Physics Question 6

Practice objective / multiple choice question 6 from the 2021 Neco Physics examination.

Neco 2021 Physics Objective / Multiple Choice Hard Difficulty
Question 6 NECO • 2021 • PHYSICS • objective

A single rectangular coil of area \( A = 0.01\ \text{m}^2 \) and resistance \( R = 5\ \Omega \) rotates in a uniform magnetic field of magnitude \( B = 0.20\ \text{T} \). The coil starts from rest and rotates with a constant angular acceleration \( \alpha = 2\ \text{rad\ s}^{-2} \) about an axis perpendicular to the field. Determine (a) the magnitude of the induced emf at \( t = 3\ \text{s} \), (b) the instantaneous current at that instant, and (c) the total charge that has passed through the circuit from \( t = 0 \) to \( t = 3\ \text{s} \).

Answer Options

A. 5.0 mV, 1.1×10⁻⁴ A, 6.5×10⁻⁴ C
B. 5.2 mV, 1.0×10⁻⁴ A, 8.0×10⁻⁴ C
C. 4.5 mV, 9.0×10⁻⁴ A, 7.0×10⁻⁴ C
Correct Answer D. 4.94 mV, 9.9×10⁻⁴ A, 7.6×10⁻⁴ C
Correct Answer
D
Correct Option:
4.94 mV, 9.9×10⁻⁴ A, 7.6×10⁻⁴ C

About This Question

This is Neco 2021 Physics Question 6. It is one of the objective questions from the 2021 Neco Physics examination.

Difficulty level: Hard .

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