A 243-turn circular coil of radius 30 cm is placed in a spatially uniform magnetic field with its axis parallel to the magnetic field lines. The magnetic field is changing temporally at a rate of -0.04 T/s i.e., dB/dt = -0.04 T/s. The resistance of the coil is 6.3 Ω. What is the magnitude of the current circulating through the coil? Neglect the effect of Earth’s magnetic field. Calculate your answer in the units of ampere (A). Write your answer in decimal form with two digits to the right of the decimal point (e.g. 5.32); do not write any units.简答题

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