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TA: Tomoyuki Nakayama
Thursday, July 1, 2010
PHY 2048: Physic 2, Discussion Section 8701
Quiz 5 (Homework Sets #8 & #9)
Name:
UFID:
Formula sheets are not allowed. Calculators are allowed. Do not store equations in your calculator.
You need to show all of your work for full credit.
________________________________________________________________________________
In the figure below right, a 200turn coil of radius 2.0 cm and resistance 5.0
Ω
is coaxial with a
solenoid of 250 turns/cm and diameter 3.0 cm. The solenoid current increases from zero to 3.0 A in
time interval
Δ
t
= 15 ms. The direction of the current is shown in the figure.
a) What are the magnitude and direction of the magnetic
field inside the solenoid at the end of time interval
Δ
t
?
(To show the direction, draw an arrow in the figure.)
At the end of
Δ
t, the current is I = 3 A. The number of
turns per unit length of the solenoid is n = 25000 turns/m
in SI unit. The magnitude of the magnetic field inside of
the solenoid is
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 Summer '08
 Any
 Physics, Work

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