The internal resistances of an ideal voltmeter and an ideal ammeter are, respectively (ideal meaning the behavior of the system is not changed when using the meter):
a. zero and infinite.
c. zero and zero.
b. infinite and zero.
d. infinite and infinite.
[Ques. 2] The Greenland ice sheet can be one km thick. Estimate the pressure underneath the ice where it is 0.80 km deep. (The density of ice is 918 kg/m3.)
a. 9.0 105 Pa (9 atm)
c. 7.2 106 Pa (72 atm)
b. 2.5 106 Pa (25 atm)
d. 9.0 106 Pa (90 atm)
[Ques. 3] In an RC circuit using two capacitors in series with two resistors, which of the following combinations would give the greatest time constant?
a. both capacitors in parallel placed in series with both resistors in parallel
b. both capacitors in series placed in series with both resistors in series
c. both capacitors in series placed in series with both resistors in parallel
d. both capacitors in parallel placed in series with both resistors in series
[Ques. 4] A stonecutter's chisel has an edge area of 0.40 cm2 . If the chisel is struck with a force of 45 N, what is the pressure exerted on the stone?
a. 1.1 106 Pa
c. 5.5 104 Pa
b. 1.1 105 Pa
d. 1.1 103 Pa
[Ques. 5] Using a resistor and two different value capacitors, which of the following combinations in an RC circuit would give the greatest time constant?
a. the resistor in series with both capacitors in series with each other
b. the resistor in series with the lower value capacitor
c. the resistor in series with the larger value capacitor
d. the resistor in series with both capacitors in parallel with each other
[Ques. 6] The pressure inside a commercial airliner is maintained at 1.00 atm (105 Pa). What is the net outward force exerted on a 1.0 m 2.0 m cabin door if the outside pressure is 0.40 atm?
a. 120,000 N
c. 1200 N
b. 12,000 N
d. 120 N
[Ques. 7] Using a capacitor and two different value resistors, which of the following combinations in an RC circuit would give the greatest time constant?
a. the capacitor in series with both resistors in parallel with each other
b. the capacitor in series with both resistors in series with each other
c. the capacitor in series with the higher value resistor
d. the capacitor in series with the lower value resistor
[Ques. 8] The quantity pressure expressed in terms of the fundamental quantities (mass, length, time) is equivalent to:
a. MLT-1.
c. M2L-1T-3.
b. ML-1T-2.
d. a dimensionless quantity.
[Ques. 9] Three resistors, each with resistance R1, are in parallel in a circuit. They are replaced by one equivalent resistor, R. Compare this resistor to the first resistor of the initial circuit. Which of the following statements is true?
a. The current through R equals the current through R1.
b. R is greater than R1.
c. The power given off by R equals the power given off by R1.
d. The voltage across R equals the voltage across R1.
[Ques. 10] The standard kilogram is a platinum-iridium cylinder 39.0 mm in height and 39.0 mm in diameter. What is the density of the material?
a. 21.5 g/cm3
c. 13.6 g/cm3
b. 19.3 g/cm3
d. 10.7 g/cm3
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