What number of turns on the secondary is needed to reduce the voltage from 120 V to 9.0 V if there are 40 turns on the primary of a step down transformer?
A. 3
B. 9
C. 18
D. 120
E. 530
A. 3
Physics & Space Science
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The universe was two minutes old when ________ started to form from deuterium fusion
Fill in the blank(s) with correct word
Physics & Space Science
Compared to the energy put into a laser, the energy of the laser beam is
A) usually much more. B) much less. C) the same. D) none of the above
Physics & Space Science
A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length. Which of the following describes the image?
A. real and inverted B. real and upright C. virtual and inverted D. virtual and upright E. not possible to determine
Physics & Space Science
A star system may undergo two or more nova outbursts
Indicate whether the statement is true or false
Physics & Space Science