technostream quize round 1

Charge in motion is called...

• Retentivity

• Conductance

• Current

• Resistance

• Current

The unit of potential difference is the

• Farad

• Watt

• Siemens

• Volt

Suppose you double the voltage in a simple DC circuit, and cut the resistance in half. The current will become

• Half as great

• Twice as great

• The same as it was before

• Four times as great

The DC voltage in a circuit is 550mV and the current is 7.2mA. What is the resistance?

• 38 ohms

• 76 ohms

• 40 ohms

• 84 ohms

A material that has extremely high electrical resistance is known as

• A semiconductor

• A paraconductor

• A resistor

• An insulator

The length of time between a point in one cycle and the same point in the next cycle of an AC wave is the

• Frequency

• Magnitude

• Amplitude

• Period

A capacitor stores electrical energy as

• Current

• Voltage

• A magnetic field

• An electric field

What is current in a circuit with a potential difference of 240V and a resistance of 75 ohms?

• 3.0 A

• 3.5 A

• 2.8 A

• 3.2A

When electrical current flows in a DC circuit, it flows from

• Positive to negative

• The switch to the resistor

• The inductor to the capacitor

• Negative to positive

A parallel circuit consists of four 16 ohm resistors. What is the total resistance?

• 32 ohms

• 64 ohms

• 2 ohms

• 4 ohms