Question

The current in an inductor

Select one:

a. is in phase with the voltage

b. lags behind the voltage by 90 degrees

c. leads the voltage by 90 degrees

The current in an resistor

Select one:

a. leads the voltage by 90 degrees

b. lags behind the voltage by 90 degrees

c. is in phase with the voltage

What is an AC circuit?

Select one:

a. A circuit in which the applied voltage is constant as a function of time

b. A circuit in an Air Conditioning unit

c. A circuit in which the applied voltage changes as a function of time

d. A circuit in which the current flows in a single direction

If a ray of light is incident on a plane mirror (flat) at an angle of 30⁰ from the surface normal, what is the angle from the normal for the reflected ray?

Select one:

a. 40⁰

b. 30⁰

c. 15⁰

d. 65⁰

If a ray of light makes a 30⁰ from the normal incident from air (n=1) into glass (n=1.5) what is the angle of the refracted ray from the normal?

Select one:

a. 19.5⁰

b. 30⁰

c. 48.6⁰

d. 76⁰

Answer 1

b. Lags behind the voltage by 90 degrees

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c. Is in phase with the voltage

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c. A circuit in which applied voltage changes as a function of time.

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b. 30^o

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a. 19.5^o