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You Are On Multi Choice Question Bank SET 1078

53901. A TRIAC will control AC voltage during the positive half cycle only.

53902. A TRIAC can be triggered or activated by either a positive or a negative input gate trigger.

53903. The TRIAC is equivalent to ________________.

53904. An optically coupled isolator is a device containing _________ in a single package.

53905. A TRIAC:

53906. When checking a good SCR or TRIAC with an ohmmeter it will:

53907. What does a hall effect sensor sense?

53908. What causes the piezoelectric effect?

53909. If the sky is seen from moon’s surface, it will appear?

53910. In the given circuit, what must the pulse width and time between pulses be to allow the capacitor to completely charge by the end of each pulse and to completely discharge between each pulse?

53911. The given circuit is an

53912. Which of the following is true for a capacitor?

53913. If the capacitor in an RC integrator shorts, the output

53914. What has the voltage across the resistor decayed to by the end of the pulse in the given circuit?

53915. How long will it take the capacitor in the given circuit to discharge?

53916. What is the voltage across the inductor in the given circuit on the falling edge of the first input pulse?

53917. A repetitive pulse with a 50% duty cycle is being applied to the input of an RC integrator. If one time constant is less than one-fifth the pulse width, the capacitor will be able to fully charge and discharge.

53918. The output of an RL differentiator is taken from across the inductor.

53919. The output voltage of an RC integrator will eventually equal the voltage of a single input pulse if the input pulse width is less than 5 time constants.

53920. The output of a differentiator could be considered a spike when the input pulse width is much longer than 5 time constants.

53921. The output of an RC differentiator is taken from across the capacitor.

53922. If the output of an RC integrator is zero volts, the capacitor might be open.

53923. During the steady-state condition of a differentiator, the average output voltage is zero volts.

53924. The voltage across a capacitor in an RC integrator circuit cannot change exponentially; it can change only instantaneously.

53925. The output voltage of a differentiator goes negative on the falling edge of the input pulse.

53926. If a repetitive-pulse waveform is applied to an RC integrator, the output waveshape depends on the relationship of the circuit time constant and the duty cycle of the input pulses.

53927. The steady-state condition of an integrator is reached after 5 time constants regardless of the number of input pulses that occur in that amount of time.

53928. A differentiator circuit can be used to convert a pulse input to a nearly constant dc output.

53929. The output voltage in the given circuit is _____ at the end of the second pulse.

53930. It takes ______ for the output voltage in the given circuit to reach its maximum value.

53931. For a capacitor to completely charge in an RC integrator, the pulse width must be _____ 5 time constants.

53932. The _____ is the time it takes for a capacitor to fully charge or discharge.

53933. After the rising edge of the input pulse occurs, it takes ______ for the voltage across the resistor to decrease to zero in the given circuit.

53934. The voltage across the capacitor in the given circuit is _______ at the beginning of the second pulse. Assume the capacitor is initially uncharged.

53935. If the pulse width were cut in half in the given circuit, the voltage across the resistor would be ______ at the end of the pulse.

53936. If the pulse source has an internal resistance of 80 in the given circuit, it will take ______ for the output voltage to decrease to zero.

53937. A(n) _____ will decrease the time constant in an RC integrator or differentiator.

53938. If the component positions were switched in the given circuit, the circuit would be an ______.

53939. What voltage will the capacitor charge up to in the given circuit for the single input pulse shown?

53940. If a periodic pulse waveform is applied to an RC differentiating circuit, which two conditions are possible?

53941. An RL integrator and an RC differentiator can act as what types of filters, respectively?

53942. In a repetitive-pulse RC integrator circuit, what would the steady-state voltage equal at the end of the fifth pulse? Assume a Vin of 20 V.

53943. What is a circuit that produces short-duration spikes?

53944. What is the secondary voltage in the given circuit?

53945. The transformer turns ratio determines

53946. Mutual induction is dependent on

53947. What is the current through the load in the given circuit?

53948. What is the power dissipated in the primary of the transformer in the given circuit?

53949. A special transformer used to convert unbalanced signals to balanced signals is the

53950. If the load doubled in value in the given circuit, what reflected resistance would the source see?

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