Physics and Astronomy Labs/Upcoming Test (a)

< Physics and Astronomy Labs

For the next Astronomy test on March 18, 2015

Questions not on this list will be on the next astronomy test

March 18 lab portion

1. If an electron's charge equals 2 in some units, and if r is the number of electrons per second, then the the current, I, equals

I=2r
I=(1/2)r
I=4r
I=r

2. If an electron's charge equals 1/2 in some units, and if r is the number of electrons per second, then the the current, I, equals

I=(1/2)r
I=2r
I=4r
I=r

3. In the gravitational analogy to electrostatics and electricity, what is the analog to charge? (Here, m is mass, h is height, and g is gravitational acceleration. Also, the formula for gravitational potential energy is mgh)

m
mg
mgh
gh

4. If the breakdown field for air is typically 60kv/inch (i.e. 60,000 volts per inch). What does that say about the voltage associated with a two inch spark?

120 kV
60 kV
30 kV
240 kV

5. If the breakdown field for air is typically 60kv/inch (i.e. 60,000 volts per inch). What does that say about the electric field associated with a two inch spark?

120 kV/inch
60 kV/inch
30 kV/inch
240 kV/inch

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partition for testmakers

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