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Details

MCAT
Electricity
14
Science
Post-Graduate
08/20/2013

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Cards

Term
Resistance in a circuit is generally measured in units of ____.
Definition
W
Term
What is the expression of Ohm's Law?
Definition
I = V/R
Term
An operating lamp draws a current of .4 ampere. The amount of charge passing through the lamp in 10 seconds is?
Definition
5.0 C
Term
An electric dryer consumes 6.0 x 106 joules of energy when operating at 220 volts for 30 minutes. During operation the dryer draws a current of approximately?
Definition
15 A
Term
When 8.0 electronvolt photons strike a photo emissive surface, the maximum kinetic energy of ejected photoelectrons is 6.0 electronvolts. The work function of the photo emissive surface is?
Definition
2.0 eV
Term
A high resistance is connected in series with the internal coil of a galvanometer to make?
Definition
A voltmeter
Term
In a transformer, two coils are wound around a common iron core. To operate properly the transformer requires?
Definition
An alternating current source connecting to the primary coil
Term
What device can be used to increase voltage from a source of direct current?
Definition
Induction coil
Term
The transformer on a power pole steps down the voltage from 10,800 volts to 120 volts. If the secondary coil contains 360 turns, how many turns are found on the primary coil?
Definition
32,400
Term
An electric motor draws 150 amperes of current while operating at 240 volts. What is the power rating of this motor?
Definition
3.6 x 10
Term
What is the potential difference across a 2.0 ohm resistor that draws 2.0 coulombs of charge per second?
Definition
4.0 V
Term
If a 15-ohm resistor is connected in parallel with a 30 ohm-resistor, the equivalent resistance is?
Definition
10W
Term
A metal wire has length L and cross-sectional area A. The resistance of the wire is directly proportional to
Definition
L/A
Term
A wire carries a current of 2.0 amperes. How many electrons pass a given point in this wire in 1.0 second?
Definition
1.3 x 10^19
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