Major Competitive Exams

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Q. In an AC circuit, the average power consumed is given by which formula? (2022)
  • A. P = VI
  • B. P = VI cos(φ)
  • C. P = V²/R
  • D. P = I²R
Q. In an AC circuit, the current lags behind the voltage by 90 degrees in which component? (2020)
  • A. Resistor
  • B. Capacitor
  • C. Inductor
  • D. Transformer
Q. In an AC circuit, the current lags behind the voltage by 90 degrees in which type of circuit? (2020)
  • A. Resistive
  • B. Inductive
  • C. Capacitive
  • D. RLC
Q. In an AC circuit, the current lags the voltage by 90 degrees in which of the following components? (2020)
  • A. Resistor
  • B. Capacitor
  • C. Inductor
  • D. Transformer
Q. In an AC circuit, the current lags the voltage by 90 degrees in which type of circuit? (2020)
  • A. Resistive
  • B. Capacitive
  • C. Inductive
  • D. RLC
Q. In an AC circuit, the voltage is given by V(t) = V0 sin(ωt). What is the peak voltage? (2021)
  • A. V0
  • B. ω
  • C. t
  • D. 0
Q. In an AC circuit, the voltage is given by V(t) = V0 sin(ωt). What is the peak voltage if V0 = 10V? (2021)
  • A. 5V
  • B. 10V
  • C. 15V
  • D. 20V
Q. In an AC circuit, what is the phase difference between voltage and current in a purely inductive circuit? (2021)
  • A. 0 degrees
  • B. 90 degrees
  • C. 180 degrees
  • D. 270 degrees
Q. In an AC circuit, what is the relationship between the average power and the RMS voltage? (2023)
  • A. P = V_rms²/R
  • B. P = V_peak²/R
  • C. P = V_rms/R
  • D. P = V_peak/R
Q. In an AC circuit, what is the unit of reactance? (2019)
  • A. Ohm
  • B. Farad
  • C. Henry
  • D. Volt
Q. In an AC generator, the induced EMF is maximum when the coil is positioned at what angle to the magnetic field?
  • A. 0 degrees
  • B. 45 degrees
  • C. 90 degrees
  • D. 180 degrees
Q. In an adiabatic process, the relationship between pressure and volume for an ideal gas is given by which equation? (2020)
  • A. PV^n = constant
  • B. PV = nRT
  • C. P1V1 = P2V2
  • D. V/T = constant
Q. In an adiabatic process, the temperature of a gas decreases. What happens to its pressure? (2021)
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on volume
Q. In an adiabatic process, the temperature of an ideal gas decreases. What happens to its pressure?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on volume
Q. In an adiabatic process, which of the following is true? (2020)
  • A. Heat is absorbed from the surroundings
  • B. Heat is released to the surroundings
  • C. No heat is exchanged
  • D. Temperature remains constant
Q. In an adiabatic process, which of the following remains constant? (2020)
  • A. Temperature
  • B. Pressure
  • C. Internal Energy
  • D. Enthalpy
Q. In an analogy, which of the following best represents resistance in an electrical circuit? (2022)
  • A. A narrow pipe
  • B. A wide pipe
  • C. A water tank
  • D. A water wheel
Q. In an arithmetic progression, if the 3rd term is 15 and the 6th term is 24, what is the common difference?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. In an arithmetic progression, if the 4th term is 20 and the 7th term is 26, what is the first term?
  • A. 10
  • B. 12
  • C. 8
  • D. 14
Q. In an arithmetic progression, if the 5th term is 20 and the 10th term is 35, what is the first term?
  • A. 5
  • B. 10
  • C. 15
  • D. 20
Q. In an arithmetic progression, if the first term is 12 and the last term is 48, and there are 10 terms, what is the common difference?
  • A. 4
  • B. 3
  • C. 5
  • D. 6
Q. In an arithmetic progression, if the first term is 5 and the common difference is 3, what is the 10th term?
  • A. 32
  • B. 30
  • C. 35
  • D. 28
Q. In an arithmetic progression, if the sum of the first 10 terms is 250, what is the first term if the common difference is 5?
  • A. 15
  • B. 20
  • C. 25
  • D. 30
Q. In an arithmetic series, if the first term is 5 and the last term is 45, and there are 10 terms, what is the common difference?
  • A. 4
  • B. 5
  • C. 3
  • D. 2
Q. In an ecosystem, which of the following organisms is known as a primary consumer? (2019)
  • A. Herbivores
  • B. Carnivores
  • C. Decomposers
  • D. Producers
Q. In an ecosystem, which of the following organisms is known as a primary producer? (2021)
  • A. Herbivores
  • B. Carnivores
  • C. Decomposers
  • D. Plants
Q. In an electric circuit, if the voltage is 12 V and the current is 3 A, what is the power?
  • A. 36 W
  • B. 9 W
  • C. 4 W
  • D. 12 W
Q. In an electric circuit, if the voltage is doubled while the resistance remains constant, what happens to the power?
  • A. It remains the same
  • B. It doubles
  • C. It quadruples
  • D. It halves
Q. In an electrochemical cell, the anode is where: (2019)
  • A. Oxidation occurs
  • B. Reduction occurs
  • C. Electrons are gained
  • D. Ions are produced
Q. In an endothermic reaction, the enthalpy of the products is ____ than that of the reactants.
  • A. higher
  • B. lower
  • C. equal
  • D. unpredictable
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