Engineering & Architecture Admissions
Q. In a mixture of gases, how does the RMS speed depend on the individual gas components?
A.
It depends only on the lightest gas
B.
It is the weighted average of the RMS speeds of the components
C.
It is the sum of the RMS speeds of the components
D.
It is independent of the gas components
Show solution
Solution
The RMS speed of a mixture of gases is the weighted average of the RMS speeds of the individual components, taking into account their molar masses.
Correct Answer: B — It is the weighted average of the RMS speeds of the components
Learn More →
Q. In a mixture of gases, how is the RMS speed of the mixture calculated?
A.
Using the average molar mass of the mixture
B.
Using the molar mass of the heaviest gas
C.
Using the molar mass of the lightest gas
D.
It cannot be calculated
Show solution
Solution
The RMS speed of a mixture of gases is calculated using the average molar mass of the mixture in the formula v_rms = sqrt((3RT)/M_avg).
Correct Answer: A — Using the average molar mass of the mixture
Learn More →
Q. In a moving coil galvanometer, what is the role of the spring?
A.
To provide a magnetic field
B.
To measure current
C.
To return the coil to its original position
D.
To increase sensitivity
Show solution
Solution
The spring in a moving coil galvanometer provides a restoring torque that returns the coil to its original position when the current is removed.
Correct Answer: C — To return the coil to its original position
Learn More →
Q. In a normal distribution, approximately what percentage of data lies within one standard deviation of the mean?
A.
50%
B.
68%
C.
75%
D.
95%
Show solution
Solution
In a normal distribution, approximately 68% of the data lies within one standard deviation of the mean.
Correct Answer: B — 68%
Learn More →
Q. In a normal distribution, what percentage of data lies within one standard deviation of the mean?
A.
50%
B.
68%
C.
75%
D.
95%
Show solution
Solution
In a normal distribution, approximately 68% of the data lies within one standard deviation of the mean.
Correct Answer: B — 68%
Learn More →
Q. In a normal distribution, what percentage of data lies within one standard deviation from the mean?
A.
68%
B.
95%
C.
99%
D.
50%
Show solution
Solution
In a normal distribution, approximately 68% of the data lies within one standard deviation from the mean.
Correct Answer: A — 68%
Learn More →
Q. In a nuclear reaction, what is conserved?
A.
Mass only
B.
Charge only
C.
Mass and charge
D.
Energy only
Show solution
Solution
In nuclear reactions, both mass and charge are conserved, according to the law of conservation of mass-energy and charge.
Correct Answer: C — Mass and charge
Learn More →
Q. In a nuclear reaction, what is the term for the energy released when a nucleus is formed from its constituent nucleons?
A.
Binding energy
B.
Kinetic energy
C.
Potential energy
D.
Thermal energy
Show solution
Solution
The energy released when a nucleus is formed from its constituent nucleons is called binding energy.
Correct Answer: A — Binding energy
Learn More →
Q. In a nuclear reaction, what is the term for the energy released?
A.
Kinetic energy
B.
Potential energy
C.
Binding energy
D.
Nuclear energy
Show solution
Solution
The energy released in a nuclear reaction is referred to as nuclear energy, which is a result of changes in the binding energy of the nucleus.
Correct Answer: D — Nuclear energy
Learn More →
Q. In a nuclear reaction, what is the term for the mass difference between the reactants and products?
A.
Mass defect
B.
Binding energy
C.
Nuclear fusion
D.
Nuclear fission
Show solution
Solution
The mass defect is the difference in mass between the reactants and products in a nuclear reaction, which is related to the binding energy.
Correct Answer: A — Mass defect
Learn More →
Q. In a p-n junction diode, what happens when it is forward biased?
A.
Depletion region widens
B.
Current flows easily
C.
No current flows
D.
Reverse breakdown occurs
Show solution
Solution
When a p-n junction diode is forward biased, the depletion region narrows, allowing current to flow easily through the junction.
Correct Answer: B — Current flows easily
Learn More →
Q. In a p-n junction diode, what happens when it is reverse-biased?
A.
Current flows freely
B.
Depletion region widens
C.
Holes move towards the n-side
D.
Electrons move towards the p-side
Show solution
Solution
When a p-n junction diode is reverse-biased, the depletion region widens, preventing current flow.
Correct Answer: B — Depletion region widens
Learn More →
Q. In a p-n junction, what is formed at the junction region?
A.
Electric field
B.
Magnetic field
C.
Thermal field
D.
Gravitational field
Show solution
Solution
An electric field is formed at the p-n junction due to the diffusion of charge carriers.
Correct Answer: A — Electric field
Learn More →
Q. In a p-n junction, what is the region called where no charge carriers are present?
A.
Depletion region
B.
Conduction band
C.
Valence band
D.
Neutral zone
Show solution
Solution
The depletion region is the area around the p-n junction where charge carriers are depleted, creating an electric field.
Correct Answer: A — Depletion region
Learn More →
Q. In a p-n junction, what is the region called where no charge carriers exist?
A.
Depletion region
B.
Conduction band
C.
Valence band
D.
Neutral zone
Show solution
Solution
The depletion region is the area around the p-n junction where charge carriers have recombined, leaving behind immobile ions.
Correct Answer: A — Depletion region
Learn More →
Q. In a parallel circuit with three resistors of 2Ω, 3Ω, and 6Ω, what is the equivalent resistance?
Show solution
Solution
The equivalent resistance for resistors in parallel is given by 1/R_eq = 1/R1 + 1/R2 + 1/R3. Thus, 1/R_eq = 1/2 + 1/3 + 1/6 = 1. Therefore, R_eq = 1Ω.
Correct Answer: B — 2Ω
Learn More →
Q. In a parallel circuit with three resistors of 6 ohms, 12 ohms, and 18 ohms, what is the equivalent resistance?
A.
3 ohms
B.
4 ohms
C.
2 ohms
D.
1 ohm
Show solution
Solution
Using the formula for resistors in parallel, 1/R_eq = 1/R1 + 1/R2 + 1/R3, we find R_eq = 1 / (1/6 + 1/12 + 1/18) = 3 ohms.
Correct Answer: A — 3 ohms
Learn More →
Q. In a parallel circuit with three resistors of values 2Ω, 3Ω, and 6Ω, what is the equivalent resistance?
Show solution
Solution
1/R_eq = 1/R1 + 1/R2 + 1/R3 = 1/2 + 1/3 + 1/6 = 1. Therefore, R_eq = 3Ω.
Correct Answer: C — 3Ω
Learn More →
Q. In a parallel circuit with three resistors of values 6 ohms, 3 ohms, and 2 ohms, what is the equivalent resistance?
A.
1.5 ohms
B.
2 ohms
C.
2.5 ohms
D.
3 ohms
Show solution
Solution
The formula for equivalent resistance in parallel is 1/R_eq = 1/R1 + 1/R2 + 1/R3. Thus, 1/R_eq = 1/6 + 1/3 + 1/2 = 1/6 + 2/6 + 3/6 = 6/6 = 1, so R_eq = 1 ohm.
Correct Answer: C — 2.5 ohms
Learn More →
Q. In a parallel circuit with three resistors R1 = 2Ω, R2 = 3Ω, and R3 = 6Ω, what is the equivalent resistance?
Show solution
Solution
The equivalent resistance in parallel is given by 1/R_total = 1/R1 + 1/R2 + 1/R3. Thus, 1/R_total = 1/2 + 1/3 + 1/6 = 1Ω.
Correct Answer: A — 1Ω
Learn More →
Q. In a parallel circuit with two resistors of 4 ohms and 6 ohms, what is the equivalent resistance?
A.
2.4 ohms
B.
10 ohms
C.
24 ohms
D.
12 ohms
Show solution
Solution
For parallel resistors, 1/R_eq = 1/R1 + 1/R2. Thus, 1/R_eq = 1/4 + 1/6 = 5/12, so R_eq = 12/5 = 2.4 ohms.
Correct Answer: A — 2.4 ohms
Learn More →
Q. In a parallel circuit with two resistors of 4 ohms and 6 ohms, what is the total current if the voltage across the circuit is 12V?
A.
2 A
B.
3 A
C.
4 A
D.
5 A
Show solution
Solution
First, find the equivalent resistance: 1/R_eq = 1/4 + 1/6 => R_eq = 2.4 ohms. Then, I = V/R_eq = 12V / 2.4Ω = 5 A.
Correct Answer: B — 3 A
Learn More →
Q. In a parallel circuit with two resistors of 4 ohms and 6 ohms, what is the total current if the voltage across the circuit is 12 V?
A.
2 A
B.
3 A
C.
4 A
D.
5 A
Show solution
Solution
First, find the equivalent resistance: 1/R_eq = 1/4 + 1/6 => R_eq = 2.4 ohms. Then, I = V/R_eq = 12 V / 2.4 ohms = 5 A.
Correct Answer: B — 3 A
Learn More →
Q. In a parallel circuit with two resistors of 4Ω and 6Ω, what is the total current if the voltage across the circuit is 12V?
Show solution
Solution
First, find the equivalent resistance: 1/R_eq = 1/4 + 1/6 => R_eq = 2.4Ω. Then, I = V/R_eq = 12V / 2.4Ω = 5A.
Correct Answer: B — 3A
Learn More →
Q. In a parallel circuit with two resistors of 6 ohms and 3 ohms, what is the equivalent resistance?
A.
2 ohms
B.
4 ohms
C.
1.5 ohms
D.
9 ohms
Show solution
Solution
Using the formula for resistors in parallel, 1/R_eq = 1/R1 + 1/R2, we have 1/R_eq = 1/6 + 1/3 = 1/6 + 2/6 = 3/6. Therefore, R_eq = 6/3 = 2 ohms.
Correct Answer: B — 4 ohms
Learn More →
Q. In a parallel circuit with two resistors R1 = 6Ω and R2 = 3Ω, what is the equivalent resistance?
A.
2Ω
B.
4Ω
C.
1.5Ω
D.
9Ω
Show solution
Solution
1/R_eq = 1/R1 + 1/R2 = 1/6 + 1/3 = 1/6 + 2/6 = 3/6, thus R_eq = 2Ω.
Correct Answer: A — 2Ω
Learn More →
Q. In a parallel circuit, if one resistor fails, what happens to the total current?
A.
It increases.
B.
It decreases.
C.
It remains the same.
D.
It becomes zero.
Show solution
Solution
In a parallel circuit, if one resistor fails, the total current decreases because the total resistance increases.
Correct Answer: B — It decreases.
Learn More →
Q. In a parallel plate capacitor, if the area of the plates is doubled while keeping the separation constant, what happens to the capacitance?
A.
It doubles
B.
It halves
C.
It remains the same
D.
It quadruples
Show solution
Solution
Capacitance is directly proportional to the area of the plates. Doubling the area will double the capacitance.
Correct Answer: A — It doubles
Learn More →
Q. In a parallel plate capacitor, if the distance between the plates is doubled while keeping the charge constant, what happens to the electric potential?
A.
It doubles
B.
It halves
C.
It remains the same
D.
It quadruples
Show solution
Solution
The electric potential V is directly proportional to the distance d between the plates, so if d is doubled, V also doubles.
Correct Answer: A — It doubles
Learn More →
Q. In a parallel plate capacitor, if the distance between the plates is halved, what happens to the capacitance?
A.
It halves
B.
It doubles
C.
It remains the same
D.
It quadruples
Show solution
Solution
Capacitance C = ε₀ * A / d. If d is halved, C doubles.
Correct Answer: B — It doubles
Learn More →
Showing 4321 to 4350 of 9893 (330 Pages)