1728 + Mcqs in Electronics Page 8 McqOptions

351.	If three resistors of 1.5 kilohms, 470 ohms, and 3300 ohms are in series with a 25-volt source, what is the total circuit current?
A.	210 mA
B.	5.2 mA
C.	4.7 mA
D.	.007 A
Answer» D. .007 A

Discussion

352.	A series circuit current:
A.	remains the same through each component
B.	is the same as the individual resistances
C.	is subtracted by each component
D.	varies through each component
Answer» B. is the same as the individual resistances

Discussion

353.	A short circuit has:
A.	too much resistance
B.	no conductance
C.	no resistance
D.	low current
Answer» D. low current

Discussion

354.	An 8-ohm resistor is in series with a lamp. The circuit current is 1 A. With 20 V applied, what voltage is being allowed for the lamp?
A.	4 V
B.	8 V
C.	12 V
D.	20 V
Answer» D. 20 V

Discussion

355.	What is the voltage at points B to D in the given circuit?
A.	+19.2 V
B.	+8.8 V
C.	+28 V
D.	19.2 V
Answer» B. +8.8 V

Discussion

356.	If series current doubles, then:
A.	resistance is halved
B.	voltage is doubled
C.	voltage is reduced
D.	resistance is doubled
Answer» B. voltage is doubled

Discussion

357.	What is wrong, if anything, with this circuit?
A.	R1 is open.
B.	R1 is shorted.
C.	R2 is open.
D.	R2 is shorted.
Answer» C. R2 is open.

Discussion

358.	While putting three 1.5 V batteries into a flashlight, you put one in backwards. The flashlight will be ______________.
A.	brighter than normal
B.	dimmer than normal
C.	off
D.	the same
Answer» C. off

Discussion

359.	Kirchhoff s voltage law states that:
A.	the sum of the voltage drops in a series circuit is equal to the total applied voltage
B.	the algebraic sum of the resistances is equal to the sum of the voltages
C.	the algebraic sum of the individual currents around a closed loop is zero
D.	the voltages developed across each element in a series circuit are identical
Answer» B. the algebraic sum of the resistances is equal to the sum of the voltages

Discussion

360.	What is the total power in the circuit?
A.	170 mW
B.	1.7 W
C.	17 W
D.	170 W
Answer» B. 1.7 W

Discussion

361.	With a total resistance of 3300 ohms and a 45 V source, if R3 is 1200 ohms, what will be its voltage drop?
A.	16.36 V
B.	32.72 V
C.	10.90 V
D.	15.00 V
Answer» B. 32.72 V

Discussion

362.	Calculate the voltage at point B in the given circuit.
A.	+10.48 V
B.	+0.94 V
C.	+2.6 V
D.	+3 V
Answer» B. +0.94 V

Discussion

363.	What are the minimum and maximum output voltages?
A.	0 V, 4 V
B.	0 V, 8 V
C.	0 V, 12 V
D.	0 V, 16 V
Answer» E.

Discussion

364.	If series resistors dissipate 16 mW, 107 mW, 146 mW, and 243 mW, what is the total power consumed by the circuit?
A.	128 mW
B.	269 mW
C.	512 mW
D.	1024 mW
Answer» D. 1024 mW

Discussion

365.	The voltage drop across a series resistor is proportional to what other value?
A.	total resistance
B.	its own resistance
C.	wattage rating
D.	the amount of time the circuit is on
Answer» C. wattage rating

Discussion

366.	If two resistors have the same voltage drop in a series circuit, it means:
A.	they are connected in parallel
B.	they are of unequal value
C.	the voltage has doubled
D.	they are of equal value
Answer» E.

Discussion

367.	A series circuit schematic is recognized because all the components are connected:
A.	diagonally across the page
B.	in a uniform vertical manner
C.	end to end in a "string"
D.	horizontally across the page
Answer» D. horizontally across the page

Discussion

368.	What determines the total resistance in a series circuit?
A.	the largest resistor
B.	the sum of the resistors
C.	the largest resistor minus the smaller
D.	the smallest resistor
Answer» C. the largest resistor minus the smaller

Discussion

369.	With a 900 V source, voltage is divided across 3 series resistors of 300 V, 280 V, and:
A.	30 V
B.	270 V
C.	320 V
D.	900 V
Answer» D. 900 V

Discussion

370.	How will an open resistor affect a series circuit?
A.	Current will flow around the open resistor.
B.	The open resistor will drop 0 V.
C.	Total resistance will decrease.
D.	No current will flow in the circuit.
Answer» E.

Discussion

371.	Resistance in a series circuit will:
A.	control the voltage
B.	double the current
C.	halve the power
D.	oppose current
Answer» E.

Discussion

372.	When a battery is connected to a series circuit, it delivers current based only upon:
A.	primary/secondary difference
B.	total resistance
C.	the polarity connections
D.	average resistance
Answer» C. the polarity connections

Discussion

373.	If R2 opens in the given circuit, what is the voltage at point B?
A.	+19.2 V
B.	+8.8 V
C.	+28 V
D.	19.2 V
Answer» D. 19.2 V

Discussion

374.	If 5 V and 16 V power supplies are connected in series-opposing, what is the total voltage?
A.	11 V
B.	16 V
C.	21 V
D.	80 V
Answer» B. 16 V

Discussion

375.	With 20 V applied, an 8-ohm resistor is in series with a lamp. When the lamp is removed, what voltage will be read across the lamp socket?
A.	0 V
B.	8 V
C.	12 V
D.	20 V
Answer» E.

Discussion

376.	In a series circuit, the voltage measured across a short will be:
A.	source voltage
B.	infinite voltage
C.	zero volts
D.	the normal voltage drop
Answer» D. the normal voltage drop

Discussion

377.	Given a series circuit containing resistors of different values, which statement is not true?
A.	The current through each resistor is the same.
B.	The sum of the voltage drops across each resistive element will be equal to source voltage.
C.	The total resistance is the sum of the value of the resistors.
D.	The voltage drop across each resistor is the same.
Answer» E.

Discussion

378.	A triac is different from an SCR because ________.
A.	it can handle large current flows
B.	it can handle large voltages
C.	the gate signal can turn off the current flow
D.	it allows current flow in both directions
Answer» E.

Discussion

379.	A thermistor's temperature characteristic is essentially _________.
A.	linear
B.	logarithmic
C.	nonlinear
D.	geometric
Answer» C. nonlinear

Discussion

380.	The three types of relative pressure measurement are ________.
A.	exact, reflective, and referenced
B.	absolute, exact, and differential
C.	absolute, gauge, and reflective
D.	absolute, gauge, and differential
Answer» E.

Discussion

381.	The two most common types of analog-to-digital converters discussed in this chapter were the ______.
A.	linear converter and the analog converter
B.	linear converter and the successive approximation converter
C.	flash converter and the analog converter
D.	flash converter and the successive approximation converter
Answer» E.

Discussion

382.	The voltage produced by a thermocouple is called the _________.
A.	hot junction voltage
B.	cold junction voltage
C.	Seebeck voltage
D.	Hooke voltage
Answer» D. Hooke voltage

Discussion

383.	The ________ are two types of acceleration transducers.
A.	LVDT and the piezoelectric
B.	magnetic and the piezoelectric
C.	RTD and the magnetic
D.	LVDT and the RTD
Answer» B. magnetic and the piezoelectric

Discussion

384.	The ______ is composed of a transformer with a movable core, a primary, and two secondaries.
A.	LVDT
B.	strain gauge
C.	accelerometer
D.	transformer displacement sensor
Answer» B. strain gauge

Discussion

385.	The gate of a TRIAC can turn it on to have current flow in either direction.
A.	True
B.	False
Answer» B. False

Discussion

386.	Thermocouple connections must be taken into account to ensure a high degree of accuracy.
A.	True
B.	False
Answer» B. False

Discussion

387.	Pressure transducers are devices that exhibit a change in resistance inversely proportional to a change in pressure.
A.	True
B.	False
Answer» C.

Discussion

388.	A basic sample-and-hold circuit consists of an analog switch, a capacitor, and an instrumentation amplifier.
A.	True
B.	False
Answer» C.

Discussion

389.	Noncontacting displacement transducers include optical and capacitive transducers.
A.	True
B.	False
Answer» B. False

Discussion

390.	The change in value of the analog signal during the sampling process produces what is called the quantization error.
A.	True
B.	False
Answer» B. False

Discussion

391.	SCRs are four-layer devices that are either fully conducting or not conducting.
A.	True
B.	False
Answer» B. False

Discussion

392.	The DIAC conducts in only one direction when gated on.
A.	True
B.	False
Answer» C.

Discussion

393.	A TRIAC will control AC voltage during the positive half cycle only.
A.	True
B.	False
Answer» C.

Discussion

394.	A TRIAC can be triggered or activated by either a positive or a negative input gate trigger.
A.	True
B.	False
Answer» B. False

Discussion

395.	A transducer does not convert energy from one form to another.
A.	True
B.	False
Answer» C.

Discussion

396.	A semiconductor using the hall effect will detect magnetic fields.
A.	True
B.	False
Answer» B. False

Discussion

397.	The silicon-controlled rectifier (SCR) is a three-layer device consisting of a gate, an anode, and a cathode.
A.	True
B.	False
Answer» C.

Discussion

398.	A DIAC is a bidirectional diode that has a symmetrical switching mode.
A.	True
B.	False
Answer» B. False

Discussion

399.	What is the power dissipated by R2, R4, and R6?
A.	P2 = 417 mW, P4 = 193 mW, P6 = 166 mW
B.	P2 = 407 mW, P4 = 183 mW, P6 = 156 mW
C.	P2 = 397 mW, P4 = 173 mW, P6 = 146 mW
D.	P2 = 387 mW, P4 = 163 mW, P6 = 136 mW
Answer» B. P2 = 407 mW, P4 = 183 mW, P6 = 156 mW

Discussion

400.	If the load in the given circuit is 120 k , what is the loaded output voltage?
A.	4.21 V
B.	15.79 V
C.	16 V
D.	19.67 V
Answer» C. 16 V

Discussion

Explore topic-wise MCQs in Engineering.

If three resistors of 1.5 kilohms, 470 ohms, and 3300 ohms are in series with a 25-volt source, what is the total circuit current?

A series circuit current:

A short circuit has:

An 8-ohm resistor is in series with a lamp. The circuit current is 1 A. With 20 V applied, what voltage is being allowed for the lamp?

What is the voltage at points B to D in the given circuit?

If series current doubles, then:

What is wrong, if anything, with this circuit?

While putting three 1.5 V batteries into a flashlight, you put one in backwards. The flashlight will be ______________.

Kirchhoff s voltage law states that:

What is the total power in the circuit?

With a total resistance of 3300 ohms and a 45 V source, if R3 is 1200 ohms, what will be its voltage drop?

Calculate the voltage at point B in the given circuit.

What are the minimum and maximum output voltages?

If series resistors dissipate 16 mW, 107 mW, 146 mW, and 243 mW, what is the total power consumed by the circuit?

The voltage drop across a series resistor is proportional to what other value?

If two resistors have the same voltage drop in a series circuit, it means:

A series circuit schematic is recognized because all the components are connected:

What determines the total resistance in a series circuit?

With a 900 V source, voltage is divided across 3 series resistors of 300 V, 280 V, and:

How will an open resistor affect a series circuit?

Resistance in a series circuit will:

When a battery is connected to a series circuit, it delivers current based only upon:

If R2 opens in the given circuit, what is the voltage at point B?

If 5 V and 16 V power supplies are connected in series-opposing, what is the total voltage?

With 20 V applied, an 8-ohm resistor is in series with a lamp. When the lamp is removed, what voltage will be read across the lamp socket?

In a series circuit, the voltage measured across a short will be:

Given a series circuit containing resistors of different values, which statement is not true?

A triac is different from an SCR because ________.

A thermistor's temperature characteristic is essentially _________.

The three types of relative pressure measurement are ________.

The two most common types of analog-to-digital converters discussed in this chapter were the ______.

The voltage produced by a thermocouple is called the _________.

The ________ are two types of acceleration transducers.

The ______ is composed of a transformer with a movable core, a primary, and two secondaries.

The gate of a TRIAC can turn it on to have current flow in either direction.

Thermocouple connections must be taken into account to ensure a high degree of accuracy.

Pressure transducers are devices that exhibit a change in resistance inversely proportional to a change in pressure.

A basic sample-and-hold circuit consists of an analog switch, a capacitor, and an instrumentation amplifier.

Noncontacting displacement transducers include optical and capacitive transducers.

The change in value of the analog signal during the sampling process produces what is called the quantization error.

SCRs are four-layer devices that are either fully conducting or not conducting.

The DIAC conducts in only one direction when gated on.

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

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

A transducer does not convert energy from one form to another.

A semiconductor using the hall effect will detect magnetic fields.

The silicon-controlled rectifier (SCR) is a three-layer device consisting of a gate, an anode, and a cathode.

A DIAC is a bidirectional diode that has a symmetrical switching mode.

What is the power dissipated by R2, R4, and R6?

If the load in the given circuit is 120 k , what is the loaded output voltage?