Voltage, Current & Resistance

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.

Resistance 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 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 difference between AC and DC is

• AC is current when electrons move backwards and forwards. and DC is current which only moves one way.

• AC is Always Current and is always on. DC is Direct Current and is switched on and off.

• DC is Digital Current and is only used on digital instruments. AC is Analogue Current and is used on older equipment.

• AC is current of a small size. DC is current of a large size.

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

• 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.

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.

A light globe can be represented by either of the diagrams shown in the picture.

• True

• False