Explore topic-wise MCQs in Engineering.

If a transistor operates at the middle of the dc load line, a decrease in the current gain will move the Q point:

If a 2 mV signal produces a 2 V output, what is the voltage gain?

The symbol h_fe is the same as:

Current gain in a transistor is inversely proportional to collector current.

In a common-base (C-B) amplifier, the output is 180 degrees out of phase with the input.

A bipolar transistor has three leads: the base, collector, and emitter.

The polarity of V_BE is such that it reverse biases the base-emitter junction.

With a common-collector (C-C) amplifier the input is applied to the base and the output is taken from the emitter.

The voltage measured from the collector to the emitter is the sum of the base-emitter voltage plus the collector-base voltage.

An emitter-follower has a voltage gain that is __________.

Transistors are controlled to operate as a switch or to operate as a variable resistor.

If this circuit were used in a digital circuit, it would be a NOT gate.

A common-emitter (C-E) is so called because the emitter is connected to both the input and output signals.

When a transistor is operating as a variable resistor it has transistance.

The three bipolar transistor circuit configurations are common-base, common-emitter, and emitter-follower.

The voltage gain of a transistor is inversely proportional to the change in output current.

When troubleshooting a bipolar junction transistor using an ohmmeter, if one of the junctions reads low in both directions, the junction is shorted and the transistor is bad. If one of the junctions reads high in both directions, the junction is shorted and the transistor is good.

In a BJT, the collector current is approximately equal to the base current.

BJTs are "junction" transistors because they use current-carrying P-N junctions.

Most of the electrons in the base of an NPN transistor flow:

In a transistor, collector current is controlled by:

When using the excess-3 code a value of 3 is added to each column of decimal digits before it is converted to a 4-bit binary code.

ASCII codes are used strictly for representing the letters in the alphabet.

64 hexadecimal equals 100 decimal.

The addition 1 + 0 doesn't generate a carry bit; one does not exist.

If you borrow from a position that contains a 0, you must borrow from the more significant bit that contains a 1. All 0s up to that point become 1s, and the digit last borrowed from becomes a 0.

The __________ code is a nonweighted binary code.

With low-power transistor packages, the base terminal is usually the:

When a silicon diode is forward biased, what is V_BE for a C-E configuration?

What is the current gain for a common-base configuration where I_E = 4.2 mA and I_C = 4.0 mA?

The input resistance of the base of an emitter-follower is usually _________.

The phase difference between the input and output ac voltage signals of a common-emitter amplifier is __________.

In this analog amplifier the input is in phase with the output.

Base bias provides _________.

The voltage measured from the collector to the emitter is the sum of the voltage base-emitter plus the voltage collector-base.

This is a PNP transistor.

A transistor used in a digital circuit will have two operating states, which are cutoff and saturation.

What is the resultant binary of the decimal problem 49 + 1 = ?

The process of converting a decimal number to its binary equivalent is called binary conversion.

A BCD code that represents each digit of a decimal number by a binary number derived by adding 3 to its 4-bit true binary value is _________.

A binary code that progresses such that only one bit changes between two successive codes is _________.

The binary coded decimal (BCD) code is a system that represents each of the 10 decimal digits as a(n) ____________.

Decimal numbers can be converted into binary by dividing by two and recording the remainders.

In the gray code, each number is 3 greater than the binary representation of that number.

A binary number's value changes most drastically when the ____ is changed.

Base is the same as radix.

The most significant digit is the rightmost, largest-weight digit in a number.

For mutual inductance to occur, the two coils must be at right angles to each other.

A transformer that has 700 turns in the primary and 35 turns in the secondary has a turns ratio of 20:1.

Regardless of whether the transformer is step-up or step-down, power in the primary equals the power in the secondary if there is 100% efficiency.