Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

In a series circuit, the already existing lightbulb dims when another light bulb is added. True or false?

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a series circuit, adding another bulb increases total resistance, which decreases current through the circuit. Since each bulb's brightness depends on current, the existing bulb dims because it now receives less current with the same source voltage.

Multiple choice general knowledge science & technology

Which one of the following could be used to represent the units of conductance(G)?

  1. Inverted Greek letter Omega

  2. Mho

  3. Siemens

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Conductance (G) is measured in siemens (S), historically called 'mho' (ohm spelled backward), and symbolized by an inverted omega (℧). All three representations - inverted omega, mho, and siemens - are valid ways to denote conductance units.

Multiple choice general knowledge science & technology

Rehearsal resembles... ?

  1. autobiographical stories

  2. encoding

  3. echoic memory

  4. "re-hearing" something
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rehearsal in cognitive psychology means repeatedly 're-hearing' or mentally reviewing information to strengthen memory consolidation. The term comes from theater practice where actors re-hear lines through repetition. It's not encoding (initial learning), echoic memory (brief sensory echo), or autobiographical recall.

Multiple choice general knowledge science & technology

What law is described by the following equation: Voltage(v) = Current(i) x Resistance(R).

  1. Kirchhoff's Current Law

  2. Ohm's Law

  3. Kirchhoff's Voltage Law

  4. Law of Superposition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ohm's Law states that voltage across a conductor equals current through it multiplied by resistance (V = I × R). Kirchhoff's laws deal with current junctions and voltage loops, while superposition is for analyzing circuits with multiple sources.

Multiple choice general knowledge science & technology

Which one of the following equations could be used to calculate the power absorbed by a resistor?

  1. Power(p) = Current squared(i?) x Resistance(R)

  2. Power(p) = Voltage squared(v?) / Resistance(R)

  3. Power(p) = Voltage(v) x Current(i)

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All three formulas correctly calculate power dissipated by a resistor: P = I²R (from P = VI and V = IR), P = V²/R (substituting I = V/R), and P = VI (definition of power). They're mathematically equivalent through Ohm's Law.

Multiple choice general knowledge science & technology

A drawback of the yes/no method of recognition testing is that... ?

  1. it forces people to make a choice

  2. it eliminates the effects of experience

  3. different people require different levels of confidence before saying "yes"

  4. it makes recognition into a matter of probabilities
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The yes/no method of recognition testing has a significant drawback: different individuals have different confidence thresholds for saying 'yes.' Some people need high certainty before recognizing something, while others are more liberal. This variability makes it difficult to standardize results across participants.

Multiple choice general knowledge science & technology

What are "two types of mental imagery" pointed out by researchers?

  1. "internal" and "external"

  2. "pictures" versus "space"

  3. color versus black and white

  4. "higher" and "lower"
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Researchers distinguish between 'pictures' and 'space' as two fundamental types of mental imagery. Picture-like imagery involves visual representations, while spatial imagery involves understanding spatial relationships and dimensions without necessarily forming a visual picture.

Multiple choice general knowledge science & technology

A person with a low set-point eats a very rich meal. What normally happens next?

  1. body temperature falls

  2. the set point is raised for a day or two

  3. extreme sleepiness

  4. body temperature rises
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When a person with a low set-point eats a very rich meal, their body temperature rises as part of the thermic effect of food. The body increases metabolic rate to digest the rich food, generating heat as a byproduct. This temporary increase helps process the caloric intake.

Multiple choice general knowledge science & technology

What are two primary symptoms of the antisocial personality?

  1. amorality and impulsiveness

  2. anger and aggression

  3. guilt and pride

  4. hatred of society and willingness to take action against it
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Antisocial personality disorder is primarily characterized by amorality (lack of moral judgment) and impulsiveness (acting without thinking). While anger and aggression may be present, they are not the defining characteristics. The core issue is the absence of conscience and poor impulse control.