1 microphone = (presumably) 10⁻⁶ phone
1 phone = (presumably) 10⁶ microphones
(10⁻¹) phone = (presumably) (10⁻¹) x (10⁶ microphones)
= 10⁵ microphones.
Explanation:
It is given that, the field near a typical pulsed-field machine rises from 0 T to 2.5 T in 200 μs
Change in magnetic field, 
Change in time, 
Diameter, d = 2.3 cm
Radius, r = 0.0115 m
Emf is induced in the ring as the field changes. It is given by :




E = 5.19 volts
So, the emf induced in the ring is 5.19 volts. Hence, this is the required solution.
<span>The correct answer is C. divergent. Divergent boundaries are something like lines found between two tectonic plates. These constructive boundaries, or extensional boundaries, are formed and exist between two tectonic plates that move away from each other. Convergent would thus be where they meet. This is all according to the tectonic theory.</span>
Answer: 5Hz
Explanation: Frequency = Wave speed divided by wavelength.