Welcome to your 2365 602 Electrical Science
1.
A piece of steel wire is to be cut by a pair of wire cutters. The wire is gripped 5mm from the fulcrum, whilst the pressure is applied to the handles 80mm from the fulcrum. Calculate the force that must be applied to the handles in order to cut the wire if it requires a direct cutting force of 160N?
2.
The direction of the magnetic field produced by a current in a coil depends on the direction of the?
3.
How many Diodes are in a Bridge rectifier?
5.
Large quantities of electric power are produced in generators or alternators by?
6.
What is the Quantity symbol for Potential Difference?
7.
Which of the following electronic components are used to control or reduce current flow?
8.
Current is described by the movement of free?
9.
Given the formula: Force (Newtons) = Mass (kg) x acceleration (m/s) 2 a body is accelerated at 2 m/sec when a force of 10 Newtons is applied to is the mass of the body will be:
10.
If a motor’s input is 75 Watts and it’s output is 50 Watts, what is the efficiency of the motor?
11.
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?
12.
What is the Quantity symbol for Mass?
13.
A d.c. motor takes 9.6 A from a 400 volt supply. Calculate the power input to the motor?
15.
What is the formula for energy?
16.
The force acting on a mass of 10kg is?
17.
Which one of the following is used to determine the voltage in a circuit?
18.
Which of the following statements describes the frequency of a waveform?
19.
The formula for power is?
20.
Which of the following devices are used to provide temperature control when heating spaces
21.
A length of a conductor has a resistance of 1Ω . If its cross sectional area was doubled its resistance would be?
22.
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?
23.
Which one of the following does NOT conduct electricity?
24.
The SI unit of time is the second. Express 0.00001 seconds in a suitable sub multiple?
25.
The magnetic effect of an electric current is put to use in a?
26.
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?
27.
When the resistance of an electrical circuit is increased and the voltage stays the same, then the?
28.
Which of the following devices does not use the magnetic effect of electric current?
29.
Which of the following meters uses a small current and voltage to determine its value?
30.
A single phase lighting circuit has fifteen 150W fluorescent lights to be installed, what is the design current of the circuit
Hi
How can we go back and check what answers were wrong ?
are these qustions similair to the real test ones ?