Undergraduate

Q. If two resistors of 4Ω and 12Ω are connected in series, what is the total voltage across them if the current flowing is 2A? (2020)
  • A. 32V
  • B. 24V
  • C. 16V
  • D. 8V
Q. If two resistors of 4Ω and 6Ω are connected in parallel, what is the equivalent resistance? (2022)
  • A. 2.4Ω
  • B. 10Ω
  • C. 24Ω
  • D. 1.5Ω
Q. If two resistors of 4Ω and 6Ω are connected in series, what is the total resistance? (2023)
  • A. 10Ω
  • B. 24Ω
  • C. 2.4Ω
  • D. 12Ω
Q. If x = 3, what is the value of 2x^2 - 5x + 1? (2022)
  • A. -2
  • B. 0
  • C. 4
  • D. 6
Q. If x = 5, what is the value of 2x + 3? (2022)
  • A. 10
  • B. 13
  • C. 8
  • D. 15
Q. If x = 5, what is the value of 3x + 2? (2022)
  • A. 17
  • B. 15
  • C. 20
  • D. 18
Q. If you have 0.25 moles of sulfuric acid (H2SO4), what is its mass? (2023)
  • A. 49 g
  • B. 98 g
  • C. 25 g
  • D. 12.5 g
Q. If z = -2 + 2i, what is the value of |z|? (2019)
  • A. 2√2
  • B. 4
  • C. 2
  • D. √2
Q. If z = 1 + i, what is the value of z^2? (2022)
  • A. 2i
  • B. 1 + 2i
  • C. 2
  • D. 0
Q. If z = 1 + i, what is the value of z²? (2022)
  • A. 0
  • B. 2i
  • C. 2
  • D. 1 + 2i
Q. If z = 2 + 2i, what is |z|^2? (2021)
  • A. 8
  • B. 4
  • C. 2
  • D. 0
Q. If z = 2 - 3i, what is the conjugate of z? (2020)
  • A. 2 + 3i
  • B. 2 - 3i
  • C. -2 + 3i
  • D. -2 - 3i
Q. If z = 3 + 4i, what is the imaginary part of z? (2022) 2022
  • A. 3
  • B. 4
  • C. 7
  • D. 1
Q. If z = 3 + 4i, what is the value of z + z* (where z* is the conjugate of z)? (2017)
  • A. 6
  • B. 8
  • C. 12
  • D. 0
Q. If z = 3 + 4i, what is the value of z + z̅? (2022)
  • A. 6
  • B. 8
  • C. 7
  • D. 5
Q. If z = 4 + 3i, what is the real part of z? (2023)
  • A. 4
  • B. 3
  • C. 7
  • D. 1
Q. If z = 5 + 12i, what is the argument of z? (2022)
  • A. arctan(12/5)
  • B. arctan(5/12)
  • C. π/2
  • D. 0
Q. If \( B = \begin{pmatrix} 2 & 3 \\ 1 & 4 \end{pmatrix} \), what is \( |B| \)? (2022)
  • A. 5
  • B. 10
  • C. 1
  • D. 8
Q. In a buffer solution, which component resists changes in pH? (2020)
  • A. Strong acid
  • B. Weak acid and its salt
  • C. Strong base
  • D. Water
Q. In a buffer solution, which of the following components is essential? (2023)
  • A. Strong acid
  • B. Weak acid and its salt
  • C. Strong base
  • D. Water
Q. In a Carnot engine operating between temperatures of 500 K and 300 K, what is the efficiency of the engine? (2023)
  • A. 40%
  • B. 50%
  • C. 60%
  • D. 70%
Q. In a Carnot engine operating between temperatures T1 and T2, what is the efficiency (η) of the engine? (2023)
  • A. 1 - T2/T1
  • B. T1/T2
  • C. T2/T1
  • D. T1 - T2
Q. In a Carnot engine operating between two heat reservoirs at temperatures 500 K and 300 K, what is the maximum efficiency of the engine? (2023)
  • A. 40%
  • B. 60%
  • C. 80%
  • D. 20%
Q. In a Carnot engine, the efficiency depends on which of the following? (2023)
  • A. Temperature of the hot reservoir
  • B. Temperature of the cold reservoir
  • C. Both temperatures
  • D. Type of working substance
Q. In a chemical reaction, what does the term 'activation energy' refer to? (2023)
  • A. Energy released during the reaction
  • B. Energy required to initiate the reaction
  • C. Energy needed to maintain the reaction
  • D. Energy that is lost
Q. In a circuit with a 10Ω resistor and a 5V battery, what is the power consumed by the resistor? (2023)
  • A. 1W
  • B. 2W
  • C. 5W
  • D. 10W
Q. In a circuit with a 15V battery and a 5Ω resistor, what is the voltage drop across the resistor? (2019)
  • A. 3V
  • B. 5V
  • C. 15V
  • D. 0V
Q. In a circuit with a 15V battery and two resistors of 5Ω and 10Ω in series, what is the voltage drop across the 10Ω resistor? (2022)
  • A. 5V
  • B. 10V
  • C. 15V
  • D. 0V
Q. In a circuit with a 24V battery and a total resistance of 8Ω, what is the power consumed by the circuit? (2023)
  • A. 72 W
  • B. 48 W
  • C. 36 W
  • D. 24 W
Q. In a circuit with a 24V battery and two 8Ω resistors in series, what is the total current? (2022)
  • A. 1A
  • B. 2A
  • C. 3A
  • D. 4A
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