Electricity Review-Fall 2023

A glass rod is rubbed with silk and becomes positively charged. Which of the following is the most reasonable explanation?

• protons are added to the silk

• protons are removed from the silk

• the silk remains neutral

• electrons are removed from the rod

Tags

NGSS.MS-PS2-3

If a simple circuit has one resistor of 3 Ohms and a current of 3 Amps, how many volts is the power source?

Hint: Use Ohm's Law which states V=IR

• 3 Volts

• 6 Volts

• 9 Volts

• 19 Volts

According to Ohm's Law, if resistance remains constant and voltage increases, then the current will ______________.

Hint: Ohm's Law is V=IR

• decrease

• increase

• stay the same

• none of the above

______________ is the opposition to the flow of current in a circuit.

• Voltage

• Resistance

• Ampere

• Charge

Potential difference in electrical circuits is measure in

• coulonbs

• joules

• volts

• amperes

Which of the following is a true statement?

• insulators conduct electricity

• insulators increase electricity

• conductors conduct electricity

• conductors decrease electricity

There is a potential difference of 13 V across a resistor with 1.4 A of current in it. What is the resistance?

• 18.2 $\Omega$

• 0.107 $\Omega$

• 9.29 $\Omega$

• 18 V

• 0.0005 V

• 1800 V

• 180 V

When resistors are connected end to end in a circuit, they are said to be in series. The total resistance equals the sum of all the resistances. Suppose a string of lights has 25 bulbs. Each bulb has a resistance of 8.0 ?. If the string is plugged into a 120 V outlet, how much current is the entire set of lights?

• 0.07 A

• 15 A

• 0.6 A

• 375 A

If the two charges represented in the figure above were brought near each other, they would

• attract each other

• repel each other

• cause static discharge

• have no effect on each other

Tags

NGSS.MS-PS2-3