A property of a magnet is that it will always point in the north and south direction, when

A property of a magnet is that it will always point in the north and south direction, when

a) submerged in oil
b) charged with electricity
c) it is demagnetized
d) in the presence of iron filings
e) freely suspended in the air





Answer: E

When magnetic flux lines travel and meet in opposing directions the result can be

When magnetic flux lines travel and meet in opposing directions the result can be

a) generator action
b) electromagnetism
c) solenoid action
d) motor action
e) reluctance






Answer: D

When using Fleming's Left Hand Rule, the second finger represents:

When using Fleming's Left Hand Rule, the second finger represents:

a. Magnetic flux direction, for generators
b. Conductor motion direction, for motors
c. Conductor motion direction, for generators
d. Flux direction, for motors
e. Direction of current flow, for motors.




Answer: E

When using Fleming's Left Hand Rule, the thumb represents:

When using Fleming's Left Hand Rule, the thumb represents:

a. Magnetic flux direction, for generators
b. Conductor motion direction, for motors
c. Conductor motion direction, for generators
d. Flux direction, for motors
e. Direction of current flow, for motors.





Answer: B

The major difference between an AC and a DC generator is that a AC generator has:

The major difference between an AC and a DC generator is that a AC generator has:

a. A rotor
b. A commutator
c. Slip rings
d. A field
e. A stator





Answer: C

In right hand rule, the second finger points to:

In right hand rule, the second finger points to:

a. Direction of motion
b. Direction of magnetic lines of force
c. Direction of induced current flow

Answer: C

In right hand rule, the index finger points to:

In right hand rule, the index finger points to:

a. Direction of motion
b. Direction of magnetic lines of force
c. Direction of induced current flow






Answer: B

In right hand rule, the thumb points to:

In right hand rule, the thumb points to:

a. Direction of motion
b. Direction of magnetic lines of force
c. Direction of induced current flow






Answer: A

The galvanometer is?

The galvanometer is?

a. A sensitive current measuring device
b. A sensitive voltage measuring device
c. A sensitive resistance measuring device
d. All of the above





Answer: A

In a solenoid valve, the valve is open when?

In a solenoid valve, the valve is open when?

a. Current flow has stopped
b. Magnetic flux is increased





Answer: B

The strength of the magnetic flux about an electromagnet is:

The strength of the magnetic flux about an electromagnet is:

a. Proportional to the current flowing through the coil
b. Proportional to the number of turns in the coil
c. Proportional the permeability of the core
d. A and B
e. All of the above

Answer: E

The purpose of a rectifier is to:

The purpose of a rectifier is to:

a. Increase electrical voltage
b. Decrease electrical voltage
c. Change AC voltage to DC voltage
d. Produce a constant voltage to a pulsating voltage






Answer: C

The minimum voltage generated by a single loop DC generator occurs when the conductor is traveling relative to the magnetic lines of force at an angle of:

The minimum voltage generated by a single loop DC generator occurs when the conductor is traveling relative to the magnetic lines of force at an angle of:

a. 45°
b. 90°
c. 120°
d. 180°
e. 270°





Answer: D

Magnetite is also known as:

Magnetite is also known as:

a. Iron ore
b. Non ferrous metal
c. Lodestone
d. Hematite
e. Limonite





Answer: C

If a material has a low reluctance, it has a high

If a material has a low reluctance, it has a high

a. Permeability
b. Conductivity
c. Fluctuation
d. Magnetism
e. Capacitance




Answer: A

The major difference between an AC and a DC generator is that a DC generator has:

The major difference between an AC and a DC generator is that a DC generator has:

a. A rotor
b. A commutator
c. Slip rings
d. A field
e. A stator




Answer: B

When using Fleming's Left Hand Rule, the index finger represents:

When using Fleming's Left Hand Rule, the index finger represents:

a. Magnetic flux direction, for generators
b. Conductor motion direction, for motors
c. Conductor motion direction, for generators
d. Flux direction, for motors
e. Direction of current flow, for motors.








Answer: D

Magnetic flux can be said to be:

Magnetic flux can be said to be:

a. Lines of force within a magnet and flowing N to S
b. Lines of force outside a magnet and flowing N to S
c. A magnetic field
d. Lines of force flowing S to N outside a magnet
e. Lines of force flowing in a magnet






Answer: B

A current carrying conductor being moved by a magnetic field is the principle known as:

A current carrying conductor being moved by a magnetic field is the principle known as:

a. Magnetic flux
b. Electrolysis
c. Hydro-electrics
d. Generator action
e. Motor action






Answer: E

Iron and steel may be magnetized by rubbing the metal with a:

Iron and steel may be magnetized by rubbing the metal with a:

a. Stainless steel
b. Steel wool
c. Brass rod
d. Magnet
e. An iron filing compound







Answer: D