This preview shows pages 1–3. Sign up to view the full content.
1. The four wire loops shown have edge lengths of either
L
, 2
L
, or 3
L
.
They will
move with the same speed into a region of uniform magnetic field
,
B
directed
into the page.
Rank them according to the maximum magnitude of the induced
emf, least to greatest.
A) 3 and 4 tie, then 1 and 2 tie
B) 1, 2, 3, 4
C) 1, then 2 and 3 tie, then 4
D) 1 and 2 tie, then 3 and 4 tie
E) 4, 2, 3, 1
2. A current
i
flows through an inductor
L
in the direction from point
b
toward
point
a
. There is zero resistance in the wires of the inductor. If the current is
decreasing
,
A) The answer depends on the value of the inductance
L.
B) the potential is greater at point
a
than at point
b.
C) the potential is less at point
a
than at point
b
.
D) the answer depends on the magnitude of
di/dt
compared to the magnitude
of
i.
3. The illustration shows total internal reflection taking place in apeice of glass.
The index of refraction of this glass:
A) at most 1.15
B) at least 2.0
C) at most 2.0
D) at least 1.15
E) cannot be calculated from the given data
Version 1
Page 1
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document4. An
LC
circuit has a capacitance of 30
μ
F and an inductance of 15 mH. At time
t
= 0 the charge on the capacitor is 10
C and the current is 20 mA. The
maximum current at any time thereafter is:
A) 20 mA
B) 42 mA
C) 18 mA
D) 25 mA
E) 35 mA
5. When light travels from medium X to medium Y as shown:
A) both the speed and the frequency increase
B) both the speed and the wavelength decrease
C) both the wavelength and the frequency are unchanged
D) both the speed and the frequency decrease
E) both the speed and the wavelength increase
6. Immediately after switch S in the circuit shown is closed, the current through
This is the end of the preview. Sign up
to
access the rest of the document.
 Spring '07
 Haglund
 Physics

Click to edit the document details