Phys 2 - Exam 2

The official SI unit for magnetic flux is the weber (Wb). 1 Wb is equivalent to:

1 T⋅⋅m2

For the situation above, if the charge is +6.00 x 10−−9 C travelling at 1200 m/s and the magnetic field has a magnitude of 1.5 T, what is the magnitude of the magnetic force?

1.08 x 10−−5 N

A single rectangular loop of wire with a width of .0500 m and a height of .0300 m lies in the plane of the page. If a uniform magnetic filed of 2.50 T points out of the page in this region, what is the magnetic flux through the rectangular loop?

3.75 x 10−−3 T⋅⋅m2

For the same situation as in question 1, if 9.0 V is applied across A and B, how much energy is stored on the equivalent capacitor?

3.8 x 10−−4 J

In the diagram below, C1 = 15 μμF and C2 = 25 μμ F. What is the equivalent capacitance of these two capacitors?

40 μμF

For the same situation as in question 6, if 9.0 V is applied across A and B, what is the charge on C1?

8.5 x 10−−5 C

For the same situation as in question 1, if 9.0 V is applied across A and B, what is the charge on C1 and C2 respectively?

84 μC and 84 μC

For the same situation as in question 4, if 9.0 V is applied across A and B, what is the voltage on C1 and C2 respectively?

9.0 V and 9.0 V

If, in the situation described in question 4 above, the magnetic field increases steadily to 5.0 T over a span of 4.0 seconds (while pointing out of the page the whole time), what will be the induced emf in the rectangular coil during this time?

9.4 x 10−−4 V

In the diagram below, C1 = 15 μμF and C2 = 25 μμF (μμ means 10−−6). What is the equivalent capacitance of these two capacitors?

9.4 μF

In the diagram below, C1 = 15 μμF, C2 = 25 μμF, C3 = 35 μμF, and C4 = 45 μμF. What is the equivalent capacitance of this network of capacitors?

9.5 μμF

You are using a bar magnet and a coil of wire to generate an emf (voltage) in the coil. Rank the following scenarios in order of increasing emf generated: A) holding a relatively strong magnet motionless near the coil B) holding a relatively weak magnet relatively far from the coil and moving it quickly C) holding a relatively weak magnet near the coil and moving it quickly D) holding a relatively weak magnet motionless near the coil

A = D < B < C

True/False: In the situation described in question 1 above, the direction of the induced emf will depend on things like which pole of the magnet is facing the coil, and in which direction you move the magnet relative to the coil.

TRUE

If the speed of the particle described in question 2 is doubled, what will happen to the magnitude of the magnetic force?

it will double

A positive charge is traveling upward in the plane of the page (toward the top of the page). A magnetic field in the region points leftward in the plane of the page. In which direction will the magnetic force on the moving charge point?

out of the page

In a different situation, everything is the same as in question 1, except that the particle is traveling to the left in the plane of the page instead of upward. What is the direction of the magnetic force on the particle in this new situation?

the force will be zero

If, in the situation described in question 4 above, the magnetic field stays constant at 2.5 T, but the rectangular loop rotates over a span of 4.0 seconds while staying in the plane of the page, so that its width becomes .0300 m and its height becomes 0.0500 m (in other words it rotates so that its long dimension becomes vertical instead of horizontal) , what will be the induced emf in the rectangular coil during this time?

zero