When a solenoid is activated, the force that moves the plunger is – McqOptions

MCQOPTIONS

1.	When a solenoid is activated, the force that moves the plunger is
A.	an electromagnetic field
B.	a permanent magnetic field
C.	varying voltage
D.	a steady current
Answer» B. a permanent magnetic field

Discussion

No Comment Found

Related MCQs

<p>A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is</p>
<p>A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is</p>
<p>If the rms current through a 6.8 k<img src="/_files/images/electrical-engineering/omega.gif"> resistor is 8 mA, the rms voltage drop across the resistor is</p>
<p>The average half-cycle value of a sine wave with a 40 V peak is</p>
<p>A square wave has a period of 60 <img src="/_files/images/electrical-engineering/mu.gif">s. The first odd harmonic is</p>
<p>A 12 k<img src="/_files/images/electrical-engineering/omega.gif"> resistor is in series with a 0.02 <img src="/_files/images/electrical-engineering/mu.gif">F capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as <b>I</b> = 0.3<img src="/_files/images/electrical-engineering/angle.gif">0 mA, what is the source voltage expressed in polar form?</p>
<p>A 6 kHz sinusoidal voltage is applied to a series <i>RC</i> circuit. The frequency of the voltage across the resistor is</p>
<p>For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is</p>
<p>What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?</p>
<p>In a parallel <i>RC</i> circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is</p>