Current Electricity

This is an example of a _______ circuit

• open
• series
• parallel
• square

In a circuit, if the voltage is increased and the resistance stays the same, current will ____.

• Increase, because voltage and current are directly proportional.

• Decrease, because voltage and current are directly proportional.

• Decrease, because voltage and current are indirectly proportional.

• Increase, because voltage and current are indirectly proportional.

If the voltage stays the same and resistance is increased, current will ________.

• Increase, because current is indirectly proportional to resistance.

• Decrease, because current is indirectly proportional to resistance.

• Increase, because current is directly proportional to resistance.

• Decrease, because current is directly proportional to resistance.

Find total resistance
total current
and the voltage through resistor 3.

• 60 Ohms, 0.4 A,  8 V
• 60 Ohms, 2.5 A,  4 V
• 90 Ohms, 2.5 A, 24 V
• 60 Ohms, 0.4 A, 24 V

What is the power of a 3V light bulb with 20 A running through it?

• 0.15W
• 6W
• 60W
• 6.67W

A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms?

• 375 Amps
• 50 Amps
• 15 Amps
• 0.07 Amps

Two resistors are connected to a source of voltage as shown in the diagram below. At which position should an ammeter be placed to measure the current passing only through resistor R1?

• 1
• 2
• 3
• 4

Where should an ammeter be located to correctly measure the total current and where should a voltmeter be located to correctly measure the total voltage?

• ammeter at 3 and voltmeter at 4
• ammeter at 1 and voltmeter at 4 
• ammeter at 2 and voltmeter at 3 
• ammeter at 1 and voltmeter at 2

Resistors R1 and R2, connected in parallel, If the smallest resistance is 12 ohms, which of the following is not possible for the total resistance of the circuit?

• 10 ohms

• 14 ohms

• 5 ohms

• 8 ohms

An electric circuit contains an operating heating element and a lit lamp. Which statement best explains why the lamp remains lit when the heating element is removed from the circuit? 

• The lamp has less resistance than the heating element.
• The lamp has more resistance than the heating element
• The lamp and heating element were connected in parallel.
• The lamp and heating element were connected in series.