The magnitude of the magnetic field 8.0 cm from a straight wire carrying a current of 6.0 A is

A)

1.5 × 10-3 T.
B)

1.5 × 10-5 T.
C)

3.0 × 10-3 T.
D)

3.0 ? × 10-4 T.
E)

3.0 × 10-5 T.


B

Physics & Space Science

You might also like to view...

Resistors in Combination: Each of the resistors shown in the figure has a resistance of 180.0 ?. What is the equivalent resistance between points a and b of this combination?

A. 450.0 ? B. 720.0 ? C. 540.0 ? D. 180.0 ?

Physics & Space Science

The kinetic energy of a planet is maximum when it is

A) closest to the Sun. B) farthest from the Sun. C) least accelerating. D) none of the above

Physics & Space Science

A long 0.6-m-OD 347 stainless steel (k = 14 W/(m K)) cylindrical billet at 16°C room temperature is placed in an oven where the temperature is 260°C. If the average heat transfer coefficient is 170 W/(m2 K), (a) estimate the time required for the center temperature to increase to 232°C by using the appropriate chart and (b) determine the instantaneous surface heat flux when the center temperature is 232°C.

GIVEN
• A long cylindrical billet placed in an oven
• Billet outside diameter = 0.6 m
• Thermal conductivity (k) = 14 W/(m K)
• Initial temperature (Ti) = 16°C
• Oven temperature (T?) = 260°C
• The average heat transfer coefficient h c= 170 W/(m2 K)
• Center temperature increases to 232°C
FIND
(a) The time required using the appropriate chart (b) The instantaneous surface heat fluxes when the center temperature is 232°C
ASSUMPTIONS
• Radial conduction only in billet
• Uniform and constant properties
SKETCH

Physics & Space Science

Which of the following elements in your body is formed in stars?

A. calcium B. carbon C. oxygen D. iron E. All of these choices are correct.

Physics & Space Science