Q. What is the relationship between pressure and depth in a fluid at rest? (2019)
A.
Pressure increases with depth
B.
Pressure decreases with depth
C.
Pressure remains constant
D.
Pressure varies randomly
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Solution
In a fluid at rest, pressure increases with depth due to the weight of the fluid above.
Correct Answer:
A
— Pressure increases with depth
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Q. What is the relationship between RMS and average value of an AC waveform? (2023)
A.
RMS = Average
B.
RMS = Average × √2
C.
RMS = Average / √2
D.
RMS = Average × 2
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Solution
For a sinusoidal AC waveform, the RMS value is related to the average value by RMS = Average / √2.
Correct Answer:
C
— RMS = Average / √2
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Q. What is the relationship between the equilibrium constant (K) and the Gibbs free energy change (ΔG) at standard conditions? (2022)
A.
ΔG = -RT ln(K)
B.
ΔG = RT ln(K)
C.
ΔG = KRT
D.
ΔG = K/R
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Solution
The relationship is given by ΔG = -RT ln(K), where R is the gas constant and T is the temperature in Kelvin.
Correct Answer:
A
— ΔG = -RT ln(K)
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Q. What is the relationship between the frequency and the inductive reactance in an AC circuit? (2022)
A.
Directly proportional
B.
Inversely proportional
C.
No relation
D.
Exponential relation
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Solution
Inductive reactance is directly proportional to the frequency of the AC source.
Correct Answer:
A
— Directly proportional
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Q. What is the relationship between the frequency and the inductive reactance? (2023)
A.
Directly proportional
B.
Inversely proportional
C.
No relationship
D.
Exponentially related
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Solution
Inductive reactance (X_L) is directly proportional to frequency (f), as given by the formula X_L = 2πfL.
Correct Answer:
A
— Directly proportional
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Q. What is the relationship between the frequency and the period of a wave? (2021)
A.
Frequency is the square of the period
B.
Period is the reciprocal of frequency
C.
Frequency and period are unrelated
D.
Period is the square root of frequency
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Solution
The period T is the reciprocal of frequency f, given by T = 1/f.
Correct Answer:
B
— Period is the reciprocal of frequency
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Q. What is the relationship between the number of turns in the primary and secondary coils of a transformer and the voltages across them? (2023)
A.
V_p/V_s = N_p/N_s
B.
V_p/V_s = N_s/N_p
C.
V_p = V_s
D.
V_p + V_s = 0
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Solution
The relationship is given by V_p/V_s = N_p/N_s, where V is voltage and N is the number of turns.
Correct Answer:
A
— V_p/V_s = N_p/N_s
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Q. What is the relationship between the rate of a reaction and the concentration of reactants according to the rate law? (2019)
A.
Directly proportional
B.
Inversely proportional
C.
Exponential
D.
No relationship
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Solution
The rate of a reaction is directly proportional to the concentration of reactants raised to their respective powers in the rate law.
Correct Answer:
A
— Directly proportional
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Q. What is the relationship between the rate of reaction and temperature according to the Arrhenius equation? (2022)
A.
Inversely proportional
B.
Directly proportional
C.
Exponential
D.
Linear
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Solution
According to the Arrhenius equation, the rate of reaction increases exponentially with temperature.
Correct Answer:
C
— Exponential
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Q. What is the relationship between the RMS and average value of a sinusoidal AC current? (2023)
A.
RMS = Average
B.
RMS = Average × √2
C.
RMS = Average / √2
D.
RMS = Average × 2
Show solution
Solution
For a sinusoidal AC current, the relationship is RMS = Average / √2.
Correct Answer:
C
— RMS = Average / √2
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Q. What is the relationship between the units of energy (Joule) and force (Newton)? (2021)
A.
1 J = 1 N·m
B.
1 J = 1 N/m
C.
1 J = 1 m/N
D.
1 J = 1 N^2
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Solution
1 Joule is defined as the work done when a force of one Newton moves an object one meter, hence 1 J = 1 N·m.
Correct Answer:
A
— 1 J = 1 N·m
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Q. What is the relationship between the units of pressure in SI? (2019)
A.
1 Pa = 1 N/m²
B.
1 Pa = 1 kg/m·s²
C.
Both are correct
D.
None of the above
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Solution
Both statements are correct; 1 Pascal (Pa) is defined as 1 Newton per square meter.
Correct Answer:
C
— Both are correct
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Q. What is the relationship between the vapor pressure of a solution and the mole fraction of the solvent? (2023)
A.
Directly proportional
B.
Inversely proportional
C.
No relationship
D.
Exponential relationship
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Solution
The vapor pressure of a solution is directly proportional to the mole fraction of the solvent.
Correct Answer:
A
— Directly proportional
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Q. What is the relationship between the wavelength of light and the angle of diffraction in a single-slit experiment? (2023)
A.
Directly proportional
B.
Inversely proportional
C.
No relationship
D.
Exponential relationship
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Solution
The angle of diffraction is inversely proportional to the wavelength; as the wavelength increases, the angle of diffraction decreases.
Correct Answer:
B
— Inversely proportional
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Q. What is the relationship between the wavelength of light and the angle of diffraction in a grating? (2023)
A.
Directly proportional
B.
Inversely proportional
C.
No relationship
D.
Exponential relationship
Show solution
Solution
The angle of diffraction is directly proportional to the wavelength of light used in a diffraction grating, as described by the grating equation.
Correct Answer:
A
— Directly proportional
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Q. What is the relationship between voltage, current, and resistance as described by Ohm's Law? (2021)
A.
V = I + R
B.
V = I * R
C.
V = I / R
D.
V = R / I
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Solution
Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, with the resistance (R) being the constant of proportionality. Therefore, V = I * R.
Correct Answer:
B
— V = I * R
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Q. What is the relationship between voltage, current, and resistance as stated by Ohm's Law? (2021)
A.
V = I + R
B.
V = I * R
C.
V = I / R
D.
V = R / I
Show solution
Solution
Ohm's Law states that the voltage (V) across a conductor is directly proportional to the current (I) flowing through it, with the resistance (R) being the constant of proportionality. Therefore, V = I * R.
Correct Answer:
B
— V = I * R
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Q. What is the repeating unit of polystyrene? (2021)
A.
-CH2-CH2-
B.
-CH=CH2-
C.
-C6H5-
D.
-C3H6-
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Solution
The repeating unit of polystyrene is derived from the monomer styrene, which has the structure -CH=CH2-.
Correct Answer:
B
— -CH=CH2-
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Q. What is the resistance of a circuit if a current of 5A flows through it when a voltage of 25V is applied? (2022)
A.
5Ω
B.
10Ω
C.
15Ω
D.
20Ω
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Solution
Using Ohm's law (R = V/I), R = 25V / 5A = 5Ω.
Correct Answer:
B
— 10Ω
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Q. What is the resonant frequency of a series RLC circuit? (2020)
A.
f = 1/(2π√(LC))
B.
f = R/(2πL)
C.
f = 2π√(LC)
D.
f = 1/(2πR)
Show solution
Solution
The resonant frequency (f) of a series RLC circuit is given by the formula f = 1/(2π√(LC)).
Correct Answer:
A
— f = 1/(2π√(LC))
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Q. What is the resting membrane potential of a typical neuron? (2020)
A.
-70 mV
B.
-50 mV
C.
0 mV
D.
+30 mV
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Solution
The resting membrane potential of a typical neuron is approximately -70 mV.
Correct Answer:
A
— -70 mV
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Q. What is the result of (15 + 5) × 2? (2020)
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Solution
(15 + 5) = 20, then 20 × 2 = 40.
Correct Answer:
B
— 30
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Q. What is the result of (15 + 5) × 2? (2023) 2023
Show solution
Solution
(15 + 5) = 20, so 20 × 2 = 40.
Correct Answer:
A
— 30
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Q. What is the result of (15 ÷ 3) × 4? (2020)
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Solution
15 ÷ 3 = 5, then 5 × 4 = 20.
Correct Answer:
A
— 20
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Q. What is the result of cytokinesis in animal cells? (2020)
A.
Formation of a cell plate
B.
Formation of two daughter cells
C.
Replication of DNA
D.
Separation of sister chromatids
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Solution
Cytokinesis results in the physical separation of the cytoplasm, leading to the formation of two daughter cells.
Correct Answer:
B
— Formation of two daughter cells
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Q. What is the role of a capacitor in a semiconductor circuit? (2019)
A.
To store charge
B.
To amplify signals
C.
To rectify current
D.
To generate heat
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Solution
A capacitor is used in semiconductor circuits to store charge temporarily.
Correct Answer:
A
— To store charge
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Q. What is the role of a capacitor in an AC circuit? (2023)
A.
Stores energy
B.
Dissipates energy
C.
Generates energy
D.
None of the above
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Solution
A capacitor stores energy in an AC circuit.
Correct Answer:
A
— Stores energy
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Q. What is the role of a diode in a rectifier circuit? (2022)
A.
To amplify signals
B.
To store charge
C.
To allow current in one direction
D.
To increase voltage
Show solution
Solution
In a rectifier circuit, a diode allows current to flow in one direction, converting AC to DC.
Correct Answer:
C
— To allow current in one direction
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Q. What is the role of a doping element in a semiconductor? (2020)
A.
To increase resistance
B.
To decrease temperature
C.
To change the conductivity
D.
To create a magnetic field
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Solution
Doping elements are added to semiconductors to change their conductivity by introducing additional charge carriers.
Correct Answer:
C
— To change the conductivity
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Q. What is the role of a Punnett square? (2023)
A.
To determine the phenotype of an organism
B.
To predict the genotypes of offspring
C.
To identify mutations
D.
To analyze genetic disorders
Show solution
Solution
A Punnett square is used to predict the genotypes of offspring from a genetic cross.
Correct Answer:
B
— To predict the genotypes of offspring
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