Equivalent Resistance-8.51

In a series circuit which of the following is the same  throughout the circuit

• Resistance
• Voltage
• Current
• None of the above

Four unequal resistors are connected in series with each other. Which one of the following statements is correct about this combination?

• The equivalent resistance is equal to that of any one of the resistors.

• The equivalent resistance is equal to average of the four resistances.

• The equivalent resistance is less than that of the smallest resistor.

• The equivalent resistance is less than that of the largest resistor.

• The equivalent resistance is more than the largest resistance.

Does this diagram represent a series or parallel circuit?

• series circuit
• parallel circuit

In a parallel circuit if one of the light bulbs burns out the rest _________.

• stop the flow of electricity
•  can still light up
•  will go out
• of the light bulbs burn out also

Three resistors connected in parallel have individual values of 4.0, 6.0 and 10.0 W, respectively. If this combination is connected in series with a 12-V battery and a 2.0-Wresistor, what is the current in the 10-Wresistor?

• 0.59 A

• 1.0 A

• 11 A

• 16 A

Three resistors, with values of 2.0, 4.0 and 8.0 W, respectively, are connected in parallel. What is the overall resistance of this combination?

• 0.58 Ω

• 1.1 Ω

• 7.0 Ω

• 14.0 Ω

To complete a circuit the switch must be

• unattached
• open
• closed

Voltage is measured in __.

• volts.
• watts.
• coulombs. 

Resistance is measured in ___. 

• watts. 
• amps.
• ohms.

the tendency for a material to oppose the flow of electrons

• current
• circuit
• resistance
• difference