A flat coil having 40 turns, each one of cross-sectional area 12.0 cm2, is oriented with its plane perpendicular to a uniform magnetic field
The field varies steadily from 0.00 T to 1.20 T in 20.0 ms. What emf is induced in the coil during this time?
2.88 V
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The electric potential at a distance d from a point charge is V. At a distance d’, the potential is 2V. What is the ratio of electric field at d’ to that at d?
A. 4 B. more information is necessary C. 2 D. 1?2 E. 1?4
Imagine another solar system, with a star more massive than the Sun. Suppose a planet with the same mass as Earth orbits at a distance of 1 AU from the star. How would the planet's year (orbital period) compare to Earth's year?
A) The planet's year would be shorter than Earth's. B) The planet's year would be longer than Earth's. C) The planet's year would be the same as Earth's. D) An orbit at a distance of 1 AU would not be possible around a star more massive than the Sun.
If a cast iron has the designation 60-40-18, the yield strength is equal to _________psi.
Fill in the blank(s) with the appropriate word(s).
RC Circuits: The capacitor shown in the circuit in the figure is initially uncharged when the switch S is suddenly closed, and the battery is ideal. After one time constant has gone by, find (a) the current through the resistor and (b) the charge on the capacitor. Assume that the numbers shown are all accurate to two significant figures.
What will be an ideal response?