Power & Voltage Drops

The voltage drop across the parallel resistors shown in the figure is?

• 17.3 volts
• 20.7 volts
• 62.1 volts
• 100 volts

What is the total resistance of the circuit in the figure?

• 15.32 ohms
• 24.17 ohms
• 70.41 ohms
• 120.12 ohms

What does power mean?

• Joules transferred per second
• Electron flow per second
• Speed of electrons
• Electron energy

Power is defined as voltage times amperage. The equations is ___.

• P=I x V
• V+ P = I
• I x P = V

What is the unit of power?

• Ohms

• Volts
• Amps
• Watts

According to Kirchhoff's voltage law, the total voltage drop in a circuit is equal to the? 

• voltage of the power source
• total resistance in the circuit
• current divided by resistance
• total current in the circuit

The total voltage in a circuit with voltage drops of 15V, 25V, and 20V is?

• 20V
• 60V
• 120V
• 180V

There are four resistors in a circuit with an applied voltage of 120V. The voltage drops across three resistors is 15V each. What is the voltage drop across the fourth resistor?

• 15V
• 45V
• 75V
• 120V

What is the voltage drop for each resistor?

• 9 V: all resistors have the same voltage in a parallel circuit
• 9V: there is only one resistor in this circuit
• Trick question! They all have different voltages!
• Trick question! They all have the same current!

What is the function of a fuse?

• To burn a wire.
• To replace a copper wire.
• To protect an electrical appliance.
• To make a complete circuit.