A conducting rod (length = 80 cm) rotates at a constant angular rate of 15 revolutions per second about a pivot at one end. A uniform field (B = 60 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod?
a. 2.7 V
b. 2.1 V
c. 2.4 V
d. 1.8 V
e. 3.3 V
d
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______________are molecules with many repeating units.
Fill in the blank(s) with the appropriate word(s).
When a binary system loses orbital energy, it emits _______________ radiation
Fill in the blank(s) with correct word
Which of the following statements are not falsi?able? Being falsi?able means that, in principle, it can be shown to be false by observations or experiments
A) Human beings were created by God. B) The Sun is at the center of the solar system. C) The observable universe contains about 100 billion galaxies. D) The Earth is at the center of the solar system. E) The chemical content of the universe is mostly hydrogen and helium.
A 50-turn circular coil (radius = 15 cm) with a total resistance of 4.0 ? is placed in a uniform magnetic field directed perpendicularly to the plane of the coil. The magnitude of this field varies with time according to B = A sin (?t), where A = 80 ?T and ? = 50? rad/s. What is the magnitude of the current induced in the coil at t = 20 ms?
a. 11 mA b. 18 mA c. 14 mA d. 22 mA e. zero