Sunday, July 15, 2012

physics

An electric dryer consumes 6.0E6 joules of energy when operating at 220 volts for 30 minutes. During operation the dryer draws a current of approximately?

A. 10 A
*B. 15 A
C. 20 A
D. 25 A

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

A. .01 eV
B. 1.0 eV
*C. 2.0 eV
D. 3.0 eV

A high resistance is connected in series with the internal coil of a galvanometer to make?

A. An ammeter
B. A motor
C. A generator
*D. A voltmeter

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