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Which effect occurs within an accelerometer operating in a freely falling elevator, due to the Einstein equivalence principle?

A)Registers identically zero acceleration
B)Measures only earth's gravitational acceleration
C)Detects fluctuating inertial accelerations
D)Shows constant upward acceleration

💡 Explanation

The accelerometer reads zero because gravitation effects are locally indistinguishable from acceleration; the equivalence principle causes the inertial and gravitational forces to cancel perfectly, therefore the sensor reports no acceleration, rather than indicating gravity or fluctuating values.

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