Electricity d AAognetism
ReviewTest, June 2OO9
l.lome
This yeor there were 17 credits of 85 possibleor about zo%of te.st
l7 A distance of 1.0 rneter separatesthe centers of
trryosmall charged qpheres. The spheres exert
gravitationalforce F* and electostatic force on
{
eaehother. If the distaneebetween the spheres'
centers is increased to 9.0 meters, the
gravitational force and elechostatic force.
respectively,may be represented.as
F
D
(l) -nt*o;l
(3) sl and3e
(z)
(4) 9Feand9F,
'
**u*
:
:
'
22 When two ring magnetsarg glaged on a pencil'
B'
magnet A rem-ainsiuqpended above magnet
"s iito*tt below
'
18 The electricd resistanceof a metallic
conductor
is inverselyproportional to its
(l) temperature
(3) cross-sectionalarea
(4) resistivity
(2) Iendh
19 In a sirnple electric circui!
a 24ohm resistor is
connected acrossa 6.0_voltbattery.
What is the
curr€nt in the circuit?
(l) r.oe
(2) a.zst
(3) r+oa
(4) +.0e,
20 An operating100_.-watt
lamp is connectedto a
120-voltoutlit. Whatis tt u ti-t"f "i""t
- - i""l ";;;gf
usedby the lamp in 60.s""orrdrf
(l) 0.60I
(3) 0.0x td I
( 2) 1. 7 1
(4) r.2 x ld
i
2I A beam of electrons is directed into the electric
{ield between two oppositely chaqged parallel
plates, as shown in the diagram beb;
+
+
+
+
+
+
+
Electronbeam
The electrostatic force exerted on the electrons
by the electric fteld is directed
(1) into rhe pase
(2) out of thi iase
p**g thdbittom_of
thepage
lll
(4) tos,ar6 thr top
"f th" p";J
Which staternent describes iire gravitational
force and the magneticforce acting on magnetA
due to magnetB?
(f ) The gravitational force is attractirre and the
*"gttleti" force is rePulsive.
(2) T$ gavitational force is repulsive and the
magnetic force is attractive.
(3) Bodr the gravitational force and the magnetic force are attractive.
(a) Both the gravitational force and the magnetic force are rePulsive'
31 An alpha particle consistsof two promm and trryo
neudons.^Whatis the chargeof an alphapartide?
(3) 6.40 x lo-re C
(1) 1.25 x 10rsC
(4) 3-20 x lo-re C
(2) 2.00c
46 A 3.0-ohm resistor and a 6.0-ohm resistor are
connected in series in an operating electric
circuit. If the current thr""gh the 3.0-ohm
resistor is 4.0 amperes,what is the potential
differenceacrossthe 6.0-ohmresistor?
(1) 8.0v
(3) L2V
(4) 24V
(2)z.ov
47 Which combination of resistors has *re srnallnt
equivalent resistance?
t l ) #
2A
(2)
gL EV
Resistance
Resistance
t1)
t3)
2{2
ELEL
2A
#
45 A constant potential difference is applied across
a variable resistor held at constant temperature.
Which grryh best represents the relationship
between the resistance of the variable resistor
and the current &rough it?
L-^^A--J
2d2
Resistance
Resistance
(2)
(4)
1 A
(3)
fl.-^^tu--J
-1
1 Q
( 4 ) W
1 A
53 Two oppositely charged parallel metal plates,
1.00 centimeter apart, exert a force iith a
magnitude of 3.60 x 10-15newton on an electron
placed between the plates. Calculate the
ryagnitude of the eleckic fteld strength between
the plates._ [!how all work, inJluding the
equationand substitutionwith units.l Iz]-
l Q
54 On the diagram in your (uwu)erbooHa,sketch
a bastfour electric fteld lines with arowheads
that represent the electric {ield around a
negativelychargedconductingsphere. Ir]
55 In the qpace in your ansuer booHet, draw a
diagram of an operating circuit that includes:
. a battery as a source of potential difference
. trrv resistorsin parallel with each other
o an axrmeter that readsthe total curent in the
circuit [z]
56 Calculate the resistance of a goO.-watt toaster
o,peratingat 120-volts.[Show all work, including
the equation and substitution with units.] tz)
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17
16
15
14
13
12
11
10
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7
6
5
4
e
2
100.0
94.1
88.2
82.4
76.5
70.6
64.7
58.8
52.9
47.1
41.2
35.3
29.4
23.5
17.6
11.8
85.0
80.0
75.C
70.c
65.C
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.c
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100.0
85.0 lao
17
16
15
14
13
12
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5to''E
94.1
88.2
82.4
80.0
75.0
76.5
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
10.0
10
70.6
64.7
58.8
g
52.9
8
7
6
47.1
41.2
11
4
35.3
29.4
23.4
3
2
11 . 8
5
17.e
9t
14
70.o 8 1
8o
76
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