An ideal solenoid of radius a has n turns per unit length and current I. The magnetic flux ?B through any circular area of radius a inside the solenoid, centered on and perpendicular to the solenoid axis, is

a.

.



b.

c

Physics & Space Science

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Quasars are____

a. spiral galaxies with unusually luminous nuclei b. elliptical galaxies with very broad emission lines c. explained by the double-exhaust model d. extremely luminous objects with high redshifts e. glowing green gases due to excitation from energy from an active core

Physics & Space Science

Temperature Scales: The temperature in your classroom is closest to

A. 68 K. B. 68°C. C. 50°C. D. 295 K.

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If Q = 16 nC, a = 3.0 m, and b = 4.0 m, what is the magnitude of the electric field at point P?

A. 33 N/C B. 31 N/C C. 24 N/C D. 19 N/C E. 13 N/C

Physics & Space Science

A car is moving with a constant speed along a circular track. The car is therefore not accelerating

Indicate whether the statement is true or false

Physics & Space Science