Measuring Current, Voltage, and Resistance

Which symbols are used for the units of current and of resistance?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

The resistance of a component in a circuit is found using an ammeter and a voltmeter. How are the ammeter and the voltmeter connected?

• the voltmeter and ammeter in parallel with the component

• the voltmeter and ammeter in series with the component

• the voltmeter in parallel with the component and the ammeter in series with the component

• the voltmeter in series with the component and the ammeter in parallel with the component

A student uses a length of wire as a resistor. He makes a second resistor from the same material. To be certain of making a second resistor of higher resistance, he should use a piece of wire that is:

• longer and thicker.

• longer and thinner.

• shorter and thicker.

• shorter and thinner.

Current has units: 

• kilowatt·hour 

• ampere 

• coulomb 

• volt 

The correct units of measurement for voltage, current and resistance are

• voltage (V)

  current (A)

  resistance (Ω)

• voltage (A)

  current (V)

  resistance (Ω)

• voltage (V)

  current (A)

  resistance (R)

• voltage (V)

  current (I)

  resistance (R)

The correctly matched instruments for measuring voltage current and resistance are

• voltage = voltmeter

  current = ammeter

  resistance = ohm meter

• voltage = voltmeter

  current = current meter

  resistance = ohm meter

• voltage = voltmeter

  current = current meter

  resistance = resistance meter

• voltage = ohm meter

  current = ammeter

  resistance = resistance meter

The symbols in the diagram represent

• an ammeter, a voltmeter and an Ohm meter.

• an analogue meter, a voltmeter and an Ohm meter.

• an ammeter, a variable meter and an Ohm meter.

• an ammeter, a voltmeter and a motor.

Voltage is best described as

• the amount of energy supplied t a circuit.

• the number of electrons moving through a circuit per second.

• a measure of how difficult it is for electrons to move through as circuit.

• the changing direction of electrons in a circuit.

Current is best described as

• the amount of energy supplied t a circuit.

• the number of electrons moving through a circuit per second.

• a measure of how difficult it is for electrons to move through as circuit.

• the changing direction of electrons in a circuit.

The symbols in the diagram represent

• a resistor, a light globe & an open switch.

• a resistor, a voltmeter & an open switch.

• a wire, a light globe & an open switch.

• a resistor, a light globe & a closed switch.