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Unformatted text preview: Physics 54% @W @DTZ 7 Name ﬁéﬁ ﬁﬁmw .i’:
Circle the best answer: ﬁe; @ﬁgﬁeeé
g emit 1) A current I flows in a wire in the plane of the page and is increasing. Loops l and 2
are in the positions shown. The induced current is: a) clockwise in loops 1 and 2. b) counterclockwise in loops 1 and 2. clockwise in loop 1 and counterclockwise in loop 2. d) counterclockwise in loop 1 and clockwise in loop 2. 2) Two identical transformers have a primary winding with 10 turns and a secondary
winding with 100 turns. A 10 V battery is connected to the primary of one
transformer. A 10 V AC power source is connected to the other. The secondary produces 100 V for both the DC and AC conﬁgurations.
up; The secondary voltage is 0 using the DC case and 100 V for the AC case. 0 The secondary voltage is 100 V for the DC case and 0 for the AC case.
d) The secondary voltage is 1 volt for both the DC and AC conﬁgurations. 3) I pull a square wire loop of width 0.4 m out of a uniform magnetic ﬁeld B at a
speed v = 5 m/s as shown. The uniform magnetic ﬁeld with B = 3 T is conﬁned
to the region shown and points into the page. The right hand side of the loop is
outside of the magnetic ﬁeld as shown. a) Does the current flow clockwise or counterclockwise in the rectangular
loop? Explain. b) How large is the induced EMF? 0) llf the wire has a net resistance of 2 Q, find the magnitude and direction of
the force on the loop due to B when right side is outside of the ﬁeld. It ejoreeesakﬁ m Mejaﬂiesig et ﬁweﬂ
iii ﬂeefftg’g efﬁngge ikgéﬂ‘ﬁfj g? ...
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- Spring '09