The rapid change of an electric field induces

A) a stronger electric field.
B) a magnetic field.
C) both of these
D) none of the above


Answer: B

Physics & Space Science

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Electric Field of Point-Charges: Four tiny charged particles (two having a charge +Q and two having a charge -Q) are distributed on the x- and y-axes as shown in the figure. Each charge is equidistant from the origin. In which direction is the net electric field at the point P on the y-axis?

A. directly up (in the +y direction) B. directly left (-x direction) C. upwards and towards the left D. upwards and towards the right E. The net field is zero, so there is no direction.

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What evidence led astronomers to conclude that the Oort cloud is a spherical distribution of comets?

A) the observation that comets enter the solar system from random directions B) direct observation of comets orbiting the sun in the Oort cloud C) Astronomers did not draw that conclusion; the Oort cloud is shaped like a flat ring in the same plane as the planets. D) observations of comets getting flung out by Jupiter's gravity in random directions

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How can a large asteroid impact in one spot on Earth affect the climate of the entire Earth?

A) The impact releases greenhouse gases that immediately make Earth warmer. B) The impact blasts a hole through Earth's mantle, allowing hot metal from the core to rise up and heat the world. C) The impact blasts debris into Earth's atmosphere that blocks sunlight, making Earth's surface cooler. D) The impact tears a hole in Earth's atmosphere, allowing heat energy to escape and thereby cooling our planet.

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Why do other systems have planetary types that don't fall neatly into the terrestrial and jovian categories that we identify in our solar system?

What will be an ideal response?

Physics & Space Science