Welcome to your 2365 602 Electrical Science
1.
A circuit dissipates 3kW at a power factor of 0.7 when connected to a 230V a.c. supply. The current flowing in the circuit will be?
2.
Which ONE of the following statements is true?
3.
Which of the following devices are used to provide temperature control when heating spaces
4.
A force of 15 Newtons causes a mass to accelerate at 5ms², what is the quantity of the mass?
5.
Which one of the following has the lowest resistivity?
6.
An immersion heater uses the heating method of?
7.
Which Electronic component would be used in a domestic central heating digital thermostat?
8.
What would be the effect on magnetic flux for the two equal, current-carrying conductors shown?
9.
A single phase lighting circuit has fifteen 150W fluorescent lights to be installed, what is the design current of the circuit
10.
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is increased, the voltage induced across the coil will?
11.
50 meters of cable has resistance of 8.64Ω, what is the resistance if the length is 100 meters?
12.
Which of the following devices does not use the magnetic effect of electric current?
13.
A cooker has 4 x 1.5 kW hot plates, a 2 kW grill and a 3.5 kW oven. If the cooker is supplied from a 230 V ac supply, what is the maximum current drawn by the cooker?
14.
If a lever has a force in the middle between the fulcrum and the load, it is known as a?
15.
A 2 kW, 230 V immersion heater will draw a current of?
16.
In the diagram which best represents the Meter labelled as 'B'
17.
Transpose the formula R = pL/a to find p?
18.
Which in the diagram shows the correct rotation of the magnetic field?
19.
The electrical energy supplied by a lead-acid battery is produced by?
20.
What force is used to push electrons around a circuit?
22.
Which of the following statements describes the frequency of a waveform?
24.
Refer to the figure shown. What does value 'A' indicate?
25.
What is the SI unit of measurement symbol for Current?
26.
What is the SI unit of measurement symbol for Magnetic flux?
27.
What is the SI unit of measurement for Frequency?
28.
Which best describes the lever in the diagram?
29.
Which best describes the lever in the diagram?
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