Consider a step-up transformer (the output voltage is greater than the input voltage). What happens to the current in the output side compared to the input side?
What will be an ideal response?
As was discussed in the answer to question 26, the output current would be less
than the input current in order to maintain the same magnetic field in the piece of iron (the
iron core) in the transformer. Alternatively, we noted in this chapter that
(VI)output = (VI)input.
Therefore, an increased output voltage (compared to the input voltage) means a reduced
output current (compared to the input current) in order to keep the product the same.
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(a) Electron current flow (b) Electronic (c) Ionic (d) Orientational
Earthquake P waves are
a. neither longitudinal nor transverse. b. transverse. c. longitudinal. d. sometimes longitudinal and sometimes transverse.
A 6.0-kg object moving 5.0 m/s collides with and sticks to a 2.0-kg object. After the collision the composite object is moving 2.0 m/s in a direction opposite to the initial direction of motion of the 6.0-kg object. Determine the speed of the 2.0-kg object before the collision
a. 15 m/s b. 7.0 m/s c. 8.0 m/s d. 23 m/s e. 11 m/s
The internal energy of an ideal gas is changed by adding heat Q to the system and also by doing work W on the gas. What is the change in internal energy of the gas?
A) 4.186Q - W B) Q - 4.186W C) W - Q D) Q + W E) Q - W