Current and Resistance

If you make a wire thicker, what will be the effect?

• The resistivity of the wire will increase

• The resistance of the wire will increase

• The resistivity of the wire will decrease

• The resistance of the wire will decrease

• Nothing will change

The resistance of a material

• depends on its resistivity and the geometric properties of the material.

• does not depend on its resistivity or the geometric properties of the material.

• depends on its resistivity but not the geometric properties of the material.

• does not depend on its resistivity but on the geometric properties of the material.

Which of the following are a result of the resistance to current?

• Electric potential energy to be converted to other energy forms.

• A reduction in current.

• The wire to heat up.

• All of the above.

Which of the following statements are true?

• Voltage will not exist without any current

• Batteries are the source charges in a current

• Currents will not exist without any voltage

• Current travels through wires near light speeds

If a light bulb burns out in a series circuit, the total current

• remains unchanged

• becomes zero

• is increased a little

• is decreased a little

In a parallel circuit, if one connection is broken, all of the connections stop working.

• True.

• False.

Resistivity is measured in ___.

• W

• A

• Ω

• Ω-m

A battery supplies a 0.015 A current to a small radio. How long should the radio stay on so that 4.80 C passes through each of the following parts of the circuit through the battery 

• 300 s

• 310 s

• 320 s

• 330 s

An electrical device of 37.2 Ω resistance performs best when the current is 3.62 A. How much voltage should be applied?

• 131.66 V

• 132.66 V

• 133.66 V

• 134.66 V

The speed at which an electron moves in an electric field in a conductor is the

• speed of light.

• average collision speed.

• drift velocity.

• average electron speed.