Question

In: Physics

1- A magnet created when there is a current through a coil of wire is considered...

1- A magnet created when there is a current through a coil of wire is considered

a. electromagnet.
b. a solenoid.
c. polarized.
d. all of the above

2- The radii of the paths that ions follow in a mass spectrometer can be used to calculate the charge on the ion.
a. True
b. False

3- The __________ difference between two points separated by a distance d in a uniform field is represented by the equation ΔV = Ed.

a. electrical
b. potential
c. equipotential
d. volt

(I think its option B)

4- Electricity sent over power lines needs


a. low voltage and high current.
b. low voltage and low current.
c. high voltage and high current.
d. high voltage and low current.

5-Three resistors, 20 Ω, 40 Ω, and 40 Ω, are connected in parallel across a 12.0 V battery. What is the equivalent resistance of the this circuit diagram?


a. 10 Ω
b. 20 Ω
c. 30 Ω
d. 40 Ω

6-Transformers can change __________ with fairly little waste of energy.

a. magnetic fields
b. power
c. resistances
d. voltages

7-The _________ is proportional to the strength of the magnetic field.

a. magnetic flux per unit area
b. amount of space taken up by the magnet
c. mass of the magnet
d. size of the magnet

Solutions

Expert Solution

genius_generous answered 2 years ago
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