Q. In a potentiometer, if the wire has a uniform cross-section, how does it affect the potential gradient?
A.
It becomes non-uniform
B.
It remains uniform
C.
It increases
D.
It decreases
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Solution
If the wire has a uniform cross-section, the potential gradient remains uniform along its length.
Correct Answer:
B
— It remains uniform
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Q. In a potentiometer, if the wire is made of a material with higher resistivity, what effect does it have on the potential gradient?
A.
It increases the potential gradient.
B.
It decreases the potential gradient.
C.
It has no effect.
D.
It makes the potentiometer unusable.
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Solution
Higher resistivity increases the resistance of the wire, which decreases the current for a given voltage, thus increasing the potential gradient.
Correct Answer:
B
— It decreases the potential gradient.
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Q. In a potentiometer, what is the role of the jockey?
A.
To measure current.
B.
To connect the circuit.
C.
To find the balance point.
D.
To provide a reference voltage.
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Solution
The jockey is used to find the balance point where the potential difference is equal to the reference voltage.
Correct Answer:
C
— To find the balance point.
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Q. In a practical Wheatstone bridge, what is the effect of temperature on resistance measurements?
A.
Temperature has no effect
B.
Resistance increases with temperature
C.
Resistance decreases with temperature
D.
It depends on the material
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Solution
The effect of temperature on resistance measurements in a Wheatstone bridge depends on the material of the resistors, as different materials have different temperature coefficients.
Correct Answer:
D
— It depends on the material
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Q. In a practical Wheatstone bridge, what is the effect of temperature on the resistors?
A.
It has no effect
B.
It can change resistance values
C.
It only affects the galvanometer
D.
It only affects the power supply
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Solution
Temperature changes can affect the resistance values of the resistors, thus affecting the balance condition.
Correct Answer:
B
— It can change resistance values
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Q. In a practical Wheatstone bridge, what is the effect of temperature on the resistances?
A.
Resistances remain constant
B.
Resistances increase with temperature
C.
Resistances decrease with temperature
D.
Temperature has no effect
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Solution
In general, the resistance of conductors increases with temperature due to increased atomic vibrations.
Correct Answer:
B
— Resistances increase with temperature
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Q. In a practical Wheatstone bridge, what is the main source of error?
A.
Temperature variations
B.
Resistance of the connecting wires
C.
Calibration of the galvanometer
D.
Non-ideal resistors
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Solution
Non-ideal resistors can introduce errors in the measurements due to their tolerance and temperature coefficients.
Correct Answer:
D
— Non-ideal resistors
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Q. In a predator-prey relationship, what is the primary effect of an increase in the prey population? (2021)
A.
Decrease in predator population
B.
Increase in predator population
C.
Decrease in prey population
D.
No effect on predator population
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Solution
An increase in the prey population typically leads to an increase in the predator population due to more available food.
Correct Answer:
B
— Increase in predator population
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Q. In a predator-prey relationship, which of the following is true? (2022)
A.
Predators are always larger than their prey.
B.
Prey populations are always larger than predator populations.
C.
Predators help control prey populations.
D.
Prey can never escape predators.
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Solution
Predators help control the population of prey species, maintaining a balance in the ecosystem.
Correct Answer:
C
— Predators help control prey populations.
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Q. In a prism, if the angle of incidence is equal to the angle of emergence, what can be said about the angle of deviation?
A.
It is zero
B.
It is equal to the angle of incidence
C.
It is equal to the angle of emergence
D.
It is equal to the angle of the prism
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Solution
When the angle of incidence equals the angle of emergence, the angle of deviation is equal to the angle of the prism.
Correct Answer:
D
— It is equal to the angle of the prism
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Q. In a prism, if the angle of the prism is 60 degrees, what is the minimum angle of deviation for light passing through it?
A.
30 degrees
B.
60 degrees
C.
90 degrees
D.
45 degrees
Show solution
Solution
The minimum angle of deviation (D) for a prism is given by D = A, where A is the angle of the prism. Therefore, for a 60-degree prism, the minimum angle of deviation is 30 degrees.
Correct Answer:
A
— 30 degrees
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Q. In a process where 100 J of heat is added to a system and the internal energy increases by 40 J, how much work is done by the system?
A.
60 J
B.
40 J
C.
100 J
D.
140 J
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Solution
Using the first law of thermodynamics, ΔU = Q - W, we have 40 J = 100 J - W, thus W = 100 J - 40 J = 60 J.
Correct Answer:
A
— 60 J
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Q. In a process where 300 J of heat is added to a system and the internal energy increases by 100 J, how much work is done by the system?
A.
200 J
B.
100 J
C.
300 J
D.
400 J
Show solution
Solution
Using the first law of thermodynamics, ΔU = Q - W. Rearranging gives W = Q - ΔU. Here, W = 300 J - 100 J = 200 J.
Correct Answer:
A
— 200 J
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Q. In a process where 300 J of heat is added to a system and the system does 100 J of work, what is the internal energy change?
A.
200 J
B.
300 J
C.
100 J
D.
400 J
Show solution
Solution
Using the first law of thermodynamics, ΔU = Q - W = 300 J - 100 J = 200 J.
Correct Answer:
A
— 200 J
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Q. In a process where 300 J of heat is added to a system and the system does 100 J of work, what is the change in internal energy?
A.
200 J
B.
100 J
C.
300 J
D.
400 J
Show solution
Solution
Using the first law of thermodynamics, ΔU = Q - W = 300 J - 100 J = 200 J.
Correct Answer:
A
— 200 J
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Q. In a project involving tasks A, B, C, and D, if A and B can be done simultaneously but must be completed before C, and D can be done at any time, which of the following is a correct sequence?
A.
A, B, C, D
B.
C, A, B, D
C.
D, A, B, C
D.
B, A, C, D
Show solution
Solution
The sequence A, B, C, D is valid as A and B can be done simultaneously before C.
Correct Answer:
A
— A, B, C, D
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Q. In a project involving tasks A, B, C, and D, if task D can only start after task B is completed, which of the following is a possible order of tasks?
A.
A, D, B, C
B.
B, A, C, D
C.
C, B, A, D
D.
D, A, B, C
Show solution
Solution
The order B, A, C, D is valid as D starts after B.
Correct Answer:
B
— B, A, C, D
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Q. In a project involving tasks A, B, C, and D, if task D can only start after task B is completed, which of the following is a valid conclusion?
A.
B must be completed before D
B.
D can start before B
C.
A can start after D
D.
C must be completed before B
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Solution
The conclusion that B must be completed before D is valid based on the given condition.
Correct Answer:
A
— B must be completed before D
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Q. In a project involving tasks A, B, C, and D, if task D cannot be started until task B is completed, which of the following is a valid implication?
A.
B must be completed before D.
B.
D can start before B.
C.
A can start before B and D.
D.
C must be completed before D.
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Solution
The implication is that B must be completed before D can start, as per the given condition.
Correct Answer:
A
— B must be completed before D.
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Q. In a project involving tasks A, B, C, and D, if task D cannot start until task B is completed, which of the following is a valid inference?
A.
B must be completed before D.
B.
D can start before B.
C.
A can start before B.
D.
C must be completed before D.
Show solution
Solution
The statement clearly indicates that B must be completed before D can start.
Correct Answer:
A
— B must be completed before D.
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Q. In a project involving tasks A, B, C, and D, if task D is dependent on both A and B, which of the following is a valid completion order?
A.
B, A, D, C
B.
A, C, B, D
C.
C, A, B, D
D.
A, B, D, C
Show solution
Solution
The order A, B, D, C is valid as D can only start after A and B are completed.
Correct Answer:
D
— A, B, D, C
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Q. In a project involving tasks X, Y, Z, and W, if W cannot start until Y is completed, and Z can only start after W, which of the following is a valid sequence?
A.
Y, W, Z, X
B.
W, Y, Z, X
C.
Z, W, Y, X
D.
X, Y, W, Z
Show solution
Solution
The sequence Y, W, Z, X respects the constraints that W follows Y and Z follows W.
Correct Answer:
A
— Y, W, Z, X
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Q. In a project management context, which of the following best describes 'resource leveling'?
A.
Distributing resources evenly across all tasks.
B.
Adjusting the start and finish dates of tasks to balance resource usage.
C.
Allocating more resources to critical tasks only.
D.
Reducing the overall project scope.
Show solution
Solution
Resource leveling involves adjusting task schedules to balance resource usage, making option 1 the correct answer.
Correct Answer:
B
— Adjusting the start and finish dates of tasks to balance resource usage.
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Q. In a project timeline, if Task 1 must be completed before Task 2, and Task 3 can start only after Task 2, which of the following sequences is valid?
A.
Task 1, Task 3, Task 2
B.
Task 2, Task 1, Task 3
C.
Task 1, Task 2, Task 3
D.
Task 3, Task 1, Task 2
Show solution
Solution
The sequence Task 1, Task 2, Task 3 is valid as it respects the order of completion.
Correct Answer:
C
— Task 1, Task 2, Task 3
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Q. In a project with tasks A, B, C, and D, if task C can only start after both A and B are completed, which of the following is a valid sequence?
A.
A, B, C, D
B.
B, A, D, C
C.
C, A, B, D
D.
D, C, A, B
Show solution
Solution
A, B, C, D is valid as C starts after both A and B.
Correct Answer:
A
— A, B, C, D
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Q. In a project with tasks P, Q, R, and S, if P must be completed before Q and R, and S can be done at any time, which of the following is a possible order of completion?
A.
P, Q, R, S
B.
R, P, Q, S
C.
S, P, Q, R
D.
Q, R, P, S
Show solution
Solution
The order P, Q, R, S respects the dependency of P on Q and R.
Correct Answer:
A
— P, Q, R, S
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Q. In a project with tasks P, Q, R, S, and T, if P must be completed before Q and R, and R must be completed before S, which of the following is a valid conclusion?
A.
S can start before P.
B.
Q can start after R.
C.
R can start after P.
D.
T must be completed before P.
Show solution
Solution
R can start after P is completed, as per the given constraints.
Correct Answer:
C
— R can start after P.
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Q. In a project with tasks P, Q, R, S, and T, if P must precede Q and R must follow S, which of the following is a possible order?
A.
P, Q, S, R, T
B.
S, R, P, Q, T
C.
Q, P, S, R, T
D.
R, S, P, Q, T
Show solution
Solution
The order P, Q, S, R, T satisfies the conditions that P is before Q and S is before R.
Correct Answer:
A
— P, Q, S, R, T
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Q. In a purely capacitive AC circuit, the current leads the voltage by how many degrees? (2022)
A.
0°
B.
90°
C.
180°
D.
270°
Show solution
Solution
In a purely capacitive circuit, the current leads the voltage by 90°.
Correct Answer:
B
— 90°
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Q. In a purely capacitive AC circuit, the current leads the voltage by how much phase angle? (2023)
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
Show solution
Solution
In a purely capacitive circuit, the current leads the voltage by 90 degrees.
Correct Answer:
B
— 90 degrees
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