A battery is connected to a wire, and makes a current in the wire. Which of the following changes would not affect the magnitude of the resistance? (There may be more than one correct choice, select all) using a battery with a higher-rated voltage. increasing the temperature of the wire. reducing the length of the wire by half and doubling cross sectional area of the wire. keeping the wire the same length, but making it thinner. making the wire into a coil, but keeping its dimensions the same. increasing the length of the wire.
A battery is connected to a wire, and makes a current in the wire. Which of the following changes would not affect the magnitude of the resistance? (There may be more than one correct choice, select all) using a battery with a higher-rated voltage. increasing the temperature of the wire. reducing the length of the wire by half and doubling cross sectional area of the wire. keeping the wire the same length, but making it thinner. making the wire into a coil, but keeping its dimensions the same. increasing the length of the wire.
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Transcribed Image Text:A battery is connected to a wire, and makes a current in the wire. Which of the following changes
would not affect the magnitude of the resistance? (There may be more than one correct choice,
select all)
using a battery with a higher-rated voltage.
increasing the temperature of the wire.
reducing the length of the wire by half and doubling cross sectional area of the wire.
keeping the wire the same length, but making it thinner.
making the wire into a coil, but keeping its dimensions the same.
increasing the length of the wire.
Expert Solution
Step 1
1)From V = IR
If voltage increases resistance also increases .
2)From R = R0[1 + (T - T0)]
If temperature increases resistance changes.
3) from R= p = rho(resistivity) l=length. A = area of cross section
If length reducing half and area doubling then R becomes 1/4th
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