Science Bowl Practice Questions

Physics - 6

34.

Short Answer: Five volts are applied across the plates of a parallel plate capacitor. The distance of
separation of the plates is .02 meters. What is the magnitude of the electric field inside the capacitor?

ANSWER: 250 VOLTS PER METER or 250 NEWTONS PER COULOMB

35.

Short Answer: Used normally, a 150-watt, 120 volt light bulb requires how many amps of current?

ANSWER: 1.25 AMPS

36.

Short Answer: If 10 joules of energy are required to move 5 coulombs of charge between two points,
the potential difference between the two points is equal to how many volts?

ANSWER: 2 VOLTS

37.

Multiple Choice: Induced electric currents can be explained using which of the following laws?

w) Gauss's Law
x) Faraday's Law
y) Ohm's Law
z) Ampere's Law

ANSWER: X -- FARADAY'S LAW

38.

Multiple Choice: For a negative point charge, the electric field vectors:

w) circle the charge
x) point radially in toward the charge
y) point radially away from the charge
z) cross at infinity

ANSWER: X -- POINT RADIALLY IN TOWARD THE CHARGE

39.

Multiple Choice: For an infinite sheet of positive charge, the electric field lines:

w) run parallel to the sheet of charge
x) are perpendicular to the sheet of charge and point in toward the sheet
y) are perpendicular to the sheet of charge and point away from the sheet
z) fall off as one over r squared

ANSWER: Y -- ARE PERPENDICULAR TO THE SHEET OF CHARGE AND POINT AWAY