The resistance of a conductor is dependent upon:

When an increase in temperature causes a decrease in resistance, the resistor is said to have a:

An increase in the size of a cable supplying a fixed load will cause the voltage drop in that cable to:

The length and temperature of a given wire is kept the same while its CSA is doubled.

The resistance of this wire:

To measure the voltage across a load, a voltmeter should be connected in:

Which of the following is a typical application of a

series circuit in the Electrotechnology Industry?

A parallel circuit has two resistors of equal value. The total resistance will be _________ the value of each individual resistor.

If three resistors of 5Ω are connected in parallel, what will the total resistance be?

If four identical resistors are connected in parallel and have a total resistance of 25 Ω. What is the resistance of each individual resistor?

Which two of the following are typical applications of a parallel circuit in the Electrotechnology Industry?

Which of the following are examples of a series-parallel circuit?

Four resistors R₁ to R₄ of 100Ω are connected in parallel to a 10V supply. They have power ratings of 1/4W, 1/2W, 1W, and 2W respectively. The resistor which will get the hottest is:

Four resistors R₁ to R₄ of 100Ω are connected in parallel to a 10V supply. They have power ratings of 1/4W, 1/2W, 1W, and 2W respectively. The resistor which will heat up the least is:

A resistor is operated above its maximum wattage:

Which of the following apply?

The resistance of a conductor is affected by which of the following?

Which one of the materials listed below has the lowest resistance?

Which of the following cables has the lowest voltage drop?

 $\frac{R_1}{R_2}=\frac{L_1\times A_2}{L_2\times A_1}$ 
100 metres of 2.5mm2 cable has resistance of 0.66Ω.

Calculate the resistance of 65 metres of 1.5mm2 of the same type of cable at the same temperature.

(Hint: requires transposition of equation)

$$R_h=R_c\left(1+\alpha\Delta t\right)$$  

The tungsten filament in an incandescent lamp has a resistance of 99Ω at 25ºC. What will be the resistance at a temperature of 1900ºC when the lamp is switched on?

The temperature co-efficient of tungsten is 0.0045 per ºC

For the drawing shown, the voltage across R₁ is:

For the drawing shown, the voltage across R₄ is:

For the drawing shown, the voltage difference ?V between the two arrow heads is:

For the drawing shown, the current flowing through R₃ and R₄ is:

When an analogue needle moves to its furthest point, this is called:

Measuring instruments are specified by their accuracy, resolution and:

What do ammeters use to allow them to measure high currents?

Voltmeters typically have a resistance that is:

Which device is suitable for measuring the insulation resistance of an electrical installation?

Earth continuity and insulation resistance tests should only be carried out on circuits that are:

Which of the following instruments can be used to measure resistance in the field?

A continuity test can be used in an electrical installation to test for:

What is the minimum Category Rating for a multimeter used to test the supply voltage of a domestic installation at the switchboard?

When using an IR Tester to measure insulation resistance of an electrical circuit, the circuit must be:

When performing an electrical isolation immediately after 'testing dead', it is important to:

When using an analogue meter, care

must be taken to avoid 'parallax error'.

This occurs when:

Which meter would be most suitable to measure current without interrupting the circuit?

Which of the following is a non-contact voltage measuring instrument?

To minimise loading effects, digital multimeters (DMMs) have input resistances/Impedances of _________ on voltage ranges.

Proximity sensing measuring instruments i.e. Volt-sticks, are sensitive to induced voltages.

Volt-sticks work by:

Measuring instruments are specified by their accuracy, resolution and:

When a value to be measured is unknown, you

should set the meter to its _________ range.

Connecting a d. c. analogue voltmeter with reverse polarity will cause:

When using a meter to measure 180V, the best range to select is the:

The sensitivity of analogue voltmeters is stated in Ω/V.

What is the resistance of a meter with a sensitivity of 1000Ω/V on a 100V range?

What are the lower and upper limits of a meter reading of 200V which has an accuracy of ±2% of Full Scale Deflection (FSD)?

AS/NZS 3000 requires continuity testing of the of

the main earthing conductor.

Its resistance must be:

The IR test voltage for a 230V AC circuits is:

A 1MΩ resistor can be used to check the accuracy of an IR tester.

What is the reading on the IR Tester shown?

(Look carefully at the information on the scale)

In the image shown, the ammeter reads 40mA

and the voltmeter reads 20V.

What is the value of the resistor?

The CSA and temperature of a given wire is kept the same while its length is doubled.

The resistance of this wire: