Welcome to your 2365 602 Electrical Science
1.
A crowbar is used to lift a load of 70kg. The fulcrum is 0.2m from the load and the force is applied at a point 1m from the other side of the fulcrum. The amount of effort required to lift the load will be equivalent to?
2.
What is the Quantity symbol for Area?
3.
How many Diodes are in a Bridge rectifier?
4.
The direction of the magnetic field produced by a current in a coil depends on the direction of the?
5.
What is the definition of 1 ampere ?
6.
What is the value of the total resistance in the diagram?
7.
If a motor’s input is 75 Watts and it’s output is 50 Watts, what is the efficiency of the motor?
8.
A rotating part of a machine which has teeth or cogs and helps to transmit torque is know as?
9.
A 6KW Cooker supplied by 230V, requires a design current of?
10.
An immersion heater uses the heating method of?
11.
A load of conduit has a mass of 137kg, what force will be required to lift it?
12.
Using OHMS Law at a constant voltage, if Current increase then resistance?
13.
What charge does an electron have?
14.
Large quantities of electric power are produced in generators or alternators by?
15.
An electric potential is generated by thermal means when?
16.
The diagram shows a simple motor, indicating the field poles and direction of current flow. In which one of the following directions would the conductor move?
17.
Which ONE of the following statements is true?
18.
Refer to the figure shown. What does value 'B' indicate?
20.
Which of the following devices does not use the magnetic effect of electric current?
21.
The voltage of the alternator is shown in the form of a?
22.
A length of copper wire has a resistance of 5Ω. What would be the resistance if the length of wire were halved and the cross sectional area doubled?
23.
What is the Quantity symbol for Current?
24.
If a single loop of wire connected to a commutator is rotated in a permanent magnetic field, the voltage measured at the commutator will be?
25.
What is the formula for mechanical power?
27.
What is the SI unit of measurement symbol for Magnetic Flux?
29.
What is the SI unit of measurement for Power?
30.
Which of the following electronic components are used to control or reduce current flow?
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