PHYS 204 Final UPDATED Questions and CORRECT Answers
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Course
PHYS 204
Institution
PHYS 204
PHYS 204 Final UPDATED Questions and
CORRECT Answers
What is an application of a Wheatstone bridge?
a) charge storage in capacitor
b) measure voltage in a voltmeter
c) sensor in a light switch
d) change frequency in a radio - CORRECT ANSWER- c) sensor in a light switch
In a Wheatstone Bridg...
PHYS 204 Final UPDATED Questions and
CORRECT Answers
What is an application of a Wheatstone bridge?
a) charge storage in capacitor
b) measure voltage in a voltmeter
c) sensor in a light switch
d) change frequency in a radio - CORRECT ANSWER- ✔✔c) sensor in a light switch
In a Wheatstone Bridge: what is the unknown resistor, Rx?
R = 6Ω
Ra = 4Ω
Rb = 2Ω
Ig = 0A
a) 12 Ω
b) 3 Ω
c) 4 Ω
d) 6 Ω - CORRECT ANSWER- ✔✔b) 3 Ω
If Ig is not zero in a Wheatstone bridge, meaning current is flowing through the
galvanometer, which of these is true?
a) Rx = R
b) Rx > R
c) R < Ra
d) Ra < Rb - CORRECT ANSWER- ✔✔b) Rx > R
According to the junction rule for the Wheatstone bridge, which of these must be true?
(reference picture of Wheatstone bridge in lab manual)
a) Ig = Ia + Ib
b) Ix = I + Ig
, c) I = Ia + Ib
d) Ib = Ig + Ia - CORRECT ANSWER- ✔✔d) Ib = Ig + Ia
If you increase the length of a wire in the Wheatstone bridge, what happens to the resistance?
a) decreases
b) increases
c) it remains the same
d) it depends on the resisitivity - CORRECT ANSWER- ✔✔b) increases
You have two wires, both are the same length and same diameter. However, one is copper
wire (p = 1.7E-8 Ωm) and the other is nickel-silver wire (p = 28E-8. Ωm). Which wire has the
greater resistance? - CORRECT ANSWER- ✔✔Nickel-silver wire
For the Wheatstone bridge, what element has the unknown resistance?
a) a slidewire
b) a resistor
c) a galvanometer
d) a spool of wire - CORRECT ANSWER- ✔✔d) a spool of wire
What does it say when the Wheatstone bridge is balanced?
a) There is no current running through the slide-wire.
b) The current running through the top of the bridge is equal to the current in the bottom (I =
Ia).
c) There is no current running through the top of the bridge (R and Ra).
d) There is no current running through the middle (Ig = 0). - CORRECT ANSWER- ✔✔d)
There is no current running through the middle (Ig = 0).
A balanced slide-wire Wheatstone bridge has the following properties: La = 40cm, Lb =
60cm, and R = 20Ω.
What is the unknown resistance, Rx? (refer to lab manual for equation) - CORRECT
ANSWER- ✔✔Rx = 30Ω
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