Problems from "The MCAT Physics Book" 4. An electrical resistor is installed in a container of water to heat it. The resistor dissipates heat at a rate of 2.0 W, and the container holds 10 kg of water. How long would it take to raise the temperature of the water 5 C? (Note. The specific heat of water is 4.2 x 10' J/kg 'C, and I W is 1 J/s.) Four 6-V batteries are connected in series in order to power lights A and B. The resistance of light A is 40 and the resistance of light B is 20 Ω. A B A.2.4 x 10 seconds. B.4.2 x 10' seconds. C. 1.05 x 10' seconds. D. 4.2 x 10' seconds. In the circuit shown, use the following: R₁ = 20 2, R₁ = 30 2, R₁ = 40 2, AV= 18 V. 10. How does the current through light bulb A compare with the current through light bulb B? A. The current through light bulb A is less. B. The current through light bulb A is the same. C. The current through light bulb A is greater. D. None of the above is true. 11. What is the potential difference between points C and D? A. 6 volts C. 18 volts D. 24 volts B. 12 volts R₁ AV R₁ R3 P 5. What is the current flowing through resistor 2? A.0.2 A B. 0.4 A C.0.6 A D. 1.2 A 6. How does the current flowing through the wire at point P compare with the current flowing at Q? A. The current at P is less. B. The current at P is the same. C.The current at P is greater. D. The answer depends on whether one considers positive current or negative current. CS Scanned with CamScanner 12. How does the voltage drop across light A compare to the drop across light B? A. The voltage drop for A is less than that for B by a factor of 4. B. The voltage drop for A is less than that for B by a factor of 2. C. The voltage drop for A is the same as that for B. D. The voltage drop for A is greater than that for B by a factor of 2. 13. What is the current through the wire at point C? A.0.1 A B. 0.2 A C.0.4 A D. 1.8 A
Problems from "The MCAT Physics Book" 4. An electrical resistor is installed in a container of water to heat it. The resistor dissipates heat at a rate of 2.0 W, and the container holds 10 kg of water. How long would it take to raise the temperature of the water 5 C? (Note. The specific heat of water is 4.2 x 10' J/kg 'C, and I W is 1 J/s.) Four 6-V batteries are connected in series in order to power lights A and B. The resistance of light A is 40 and the resistance of light B is 20 Ω. A B A.2.4 x 10 seconds. B.4.2 x 10' seconds. C. 1.05 x 10' seconds. D. 4.2 x 10' seconds. In the circuit shown, use the following: R₁ = 20 2, R₁ = 30 2, R₁ = 40 2, AV= 18 V. 10. How does the current through light bulb A compare with the current through light bulb B? A. The current through light bulb A is less. B. The current through light bulb A is the same. C. The current through light bulb A is greater. D. None of the above is true. 11. What is the potential difference between points C and D? A. 6 volts C. 18 volts D. 24 volts B. 12 volts R₁ AV R₁ R3 P 5. What is the current flowing through resistor 2? A.0.2 A B. 0.4 A C.0.6 A D. 1.2 A 6. How does the current flowing through the wire at point P compare with the current flowing at Q? A. The current at P is less. B. The current at P is the same. C.The current at P is greater. D. The answer depends on whether one considers positive current or negative current. CS Scanned with CamScanner 12. How does the voltage drop across light A compare to the drop across light B? A. The voltage drop for A is less than that for B by a factor of 4. B. The voltage drop for A is less than that for B by a factor of 2. C. The voltage drop for A is the same as that for B. D. The voltage drop for A is greater than that for B by a factor of 2. 13. What is the current through the wire at point C? A.0.1 A B. 0.2 A C.0.4 A D. 1.8 A
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter20: Electric Current, Resistance, And Ohm's Law
Section: Chapter Questions
Problem 68PE: Integrated Concepts (a) What is the cost of heating a hot tub containing 1500 kg of water from...
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Transcribed Image Text:Problems from "The MCAT Physics Book"
4. An electrical resistor is installed in a
container of water to heat it. The resistor
dissipates heat at a rate of 2.0 W, and the
container holds 10 kg of water. How long
would it take to raise the temperature of the
water 5 C? (Note. The specific heat of water
is 4.2 x 10' J/kg 'C, and I W is 1 J/s.)
Four 6-V batteries are connected in series in
order to power lights A and B. The resistance of
light A is 40 and the resistance of light B is 20
Ω.
A
B
A.2.4 x 10 seconds.
B.4.2 x 10' seconds.
C. 1.05 x 10' seconds.
D. 4.2 x 10' seconds.
In the circuit shown, use the following:
R₁ = 20 2,
R₁ = 30 2,
R₁ = 40 2,
AV= 18 V.
10. How does the current through light bulb A
compare with the current through light bulb
B?
A. The current through light bulb A is less.
B. The current through light bulb A is the
same.
C. The current through light bulb A is
greater.
D. None of the above is true.
11. What is the potential difference between
points C and D?
A. 6 volts
C. 18 volts
D. 24 volts
B. 12 volts
R₁
AV
R₁
R3
P
5. What is the current flowing through resistor
2?
A.0.2 A
B. 0.4 A
C.0.6 A
D. 1.2 A
6. How does the current flowing through the
wire at point P compare with the current
flowing at Q?
A. The current at P is less.
B. The current at P is the same.
C.The current at P is greater.
D. The answer depends on whether one
considers positive current or negative
current.
CS Scanned with CamScanner
12. How does the voltage drop across light A
compare to the drop across light B?
A. The voltage drop for A is less than that
for B by a factor of 4.
B. The voltage drop for A is less than that for
B by a factor of 2.
C. The voltage drop for A is the same as that
for B.
D. The voltage drop for A is greater than that
for B by a factor of 2.
13. What is the current through the wire at point
C?
A.0.1 A
B. 0.2 A
C.0.4 A
D. 1.8 A
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