lesson 4 DC Motors and Generators
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| A ? motor is a DC motor that has the field wiring connected in parallel with the armature. | show 🗑
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| show | armature
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| show | Shunt
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| show | 250% / 300%
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| With a(n) ? shunt field, the speed can be regulated by varying the field current, the armature current, or both | show 🗑
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| show | stabilizing field
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| true/false DC compound motors have shared characteristics of series motors and shunt motors. | show 🗑
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| show | compound
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| show | DC cumulative-compounded motor
and DC differential-compounded motor
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| true/false DC permanent-magnet motors use magnets and coils of wire for the field windings. | show 🗑
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| show | series
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| A DC ? -wound generator provides a source of positive and zero voltage regulation to the load. | show 🗑
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| show | generator
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| ? voltage regulation occurs when the countervoltage at no load is greater than the terminal voltage at full load. | show 🗑
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| show | 75A
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| The field windings in a ? -wound generator consist of a few turns of low-resistance wire because the large load current flows through them. | show 🗑
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| show | prime mover
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| True/false In a compound-wound generator, the series field is normally stronger than the shunt field. | show 🗑
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| show | 120 volts
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| A motor connected to 280 volts has a resistance of 7 ohms. When the motor accelerates to full speed, the counter voltage is 245 volts; the total voltage in the motor is 35 volts and the current drawn is ? . | show 🗑
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| show | true
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| show | brushes
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| A(n) ? connects a brush to either the positive or negative terminal of the DC source. | show 🗑
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| show | commutator
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| The ? rule gives the direction of motion for current-carrying wire interacting with a stationary magnetic field. | show 🗑
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| The neutral plane is ? to the field flux when there is no current in the armature. | show 🗑
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| show | armature
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| show | false
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| show | permanent-magnet
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