Q. If tan(x) = 1, what is the value of x in degrees?
Show solution
Solution
tan(45°) = 1, hence x = 45°.
Correct Answer: A — 45
Learn More →
Q. If tan(x) = 3/4, what is sin(x)?
A.
3/5
B.
4/5
C.
5/3
D.
5/4
Show solution
Solution
Using the identity tan(x) = sin(x)/cos(x), we can find sin(x) = 3/5 after applying the Pythagorean theorem.
Correct Answer: A — 3/5
Learn More →
Q. If tan(x) = 3/4, what is the value of sin(x)?
A.
3/5
B.
4/5
C.
1/5
D.
0
Show solution
Solution
Using the identity tan(x) = sin(x)/cos(x), we can find sin(x) = 3/5 after calculating the hypotenuse using the Pythagorean theorem.
Correct Answer: A — 3/5
Learn More →
Q. If tan(θ) = 1, what is the value of θ in degrees?
Show solution
Solution
tan(θ) = 1 at θ = 45°.
Correct Answer: B — 45
Learn More →
Q. If tan(θ) = 1, what is the value of θ? (2020)
A.
0°
B.
30°
C.
45°
D.
60°
Show solution
Solution
tan(45°) = 1, so θ = 45°.
Correct Answer: C — 45°
Learn More →
Q. If tan(θ) = 3/4, what is the value of sin(θ)?
A.
3/5
B.
4/5
C.
5/5
D.
1
Show solution
Solution
Using the identity sin²(θ) + cos²(θ) = 1, we find sin(θ) = 3/5.
Correct Answer: A — 3/5
Learn More →
Q. If tan^(-1)(x) = π/4, then the value of x is:
Show solution
Solution
tan^(-1)(x) = π/4 implies that x = tan(π/4) = 1.
Correct Answer: B — 1
Learn More →
Q. If task C must be completed before task A, and task A must be completed before task D, which of the following is a correct inference?
A.
C can start after A
B.
D can start before A
C.
A can start before C
D.
D can start only after C
Show solution
Solution
D can only start after both A and C are completed, making the inference correct.
Correct Answer: D — D can start only after C
Learn More →
Q. If task E cannot start until both tasks A and C are completed, which of the following statements is true?
A.
E can start before A
B.
E can start before C
C.
E can start after A and C
D.
E can start only after A or C
Show solution
Solution
E can only start after both A and C are completed, making the statement true.
Correct Answer: C — E can start after A and C
Learn More →
Q. If task F must be completed before task G, and task G must be completed before task H, which of the following is a valid sequence?
A.
H, G, F
B.
F, H, G
C.
F, G, H
D.
G, F, H
Show solution
Solution
The sequence F, G, H respects the order that F is before G and G is before H.
Correct Answer: C — F, G, H
Learn More →
Q. If task M must be completed before task N, and task N must be completed before task O, which of the following is a valid inference?
A.
M can start after N
B.
O can start before M
C.
N can start before M
D.
M must be completed before O
Show solution
Solution
Since M must be completed before N, and N before O, M must indeed be completed before O.
Correct Answer: D — M must be completed before O
Learn More →
Q. If task X is dependent on tasks Y and Z being completed first, which of the following statements is true?
A.
X can start before Y and Z
B.
Y and Z can start after X
C.
X can only start after Y and Z
D.
Y and Z are independent of X
Show solution
Solution
Task X can only start after both tasks Y and Z are completed, making this statement true.
Correct Answer: C — X can only start after Y and Z
Learn More →
Q. If tasks A, B, and C must be completed in that order, which of the following sequences is invalid?
A.
A, B, C
B.
B, A, C
C.
A, C, B
D.
C, A, B
Show solution
Solution
The sequence B, A, C is invalid as it does not respect the order of A before B.
Correct Answer: B — B, A, C
Learn More →
Q. If tasks A, B, and C must be completed in that order, which of the following sequences is valid?
A.
C, B, A
B.
A, C, B
C.
B, A, C
D.
A, B, C
Show solution
Solution
The sequence A, B, C follows the required order.
Correct Answer: D — A, B, C
Learn More →
Q. If tasks L, M, and N are to be completed with L before M and N, which of the following sequences is correct?
A.
M, L, N
B.
L, N, M
C.
N, M, L
D.
L, M, N
Show solution
Solution
The sequence L, M, N is correct as it respects the order of L before both M and N.
Correct Answer: D — L, M, N
Learn More →
Q. If Team A wins 60% of its matches in a league of 10 teams, how many matches does Team A win if it plays 9 matches?
Show solution
Solution
If Team A wins 60% of its matches, then in 9 matches, it wins 0.6 * 9 = 5.4, which rounds to 6 matches.
Correct Answer: B — 6
Learn More →
Q. If the 2nd term of a GP is 8 and the 4th term is 32, what is the common ratio?
Show solution
Solution
Let the first term be a and the common ratio be r. Then, 2nd term = ar = 8 and 4th term = ar^3 = 32. Dividing gives r^2 = 4, so r = 2.
Correct Answer: A — 2
Learn More →
Q. If the 2nd term of an arithmetic progression is 8 and the 5th term is 14, what is the 3rd term?
Show solution
Solution
Let the first term be a and the common difference be d. From the equations a + d = 8 and a + 4d = 14, we can find the 3rd term a + 2d = 10.
Correct Answer: A — 10
Learn More →
Q. If the 3rd term of a GP is 27 and the common ratio is 3, what is the first term?
Show solution
Solution
Let the first term be a. Then, the 3rd term is ar^2 = 27. Thus, a * 3^2 = 27, giving a = 3.
Correct Answer: B — 9
Learn More →
Q. If the 5th term of an arithmetic progression is 15 and the 10th term is 30, what is the common difference?
Show solution
Solution
Let the first term be a and the common difference be d. From the equations a + 4d = 15 and a + 9d = 30, we can find d = 3.
Correct Answer: A — 3
Learn More →
Q. If the 6th term of an arithmetic progression is 30 and the 9th term is 45, what is the common difference?
Show solution
Solution
Let the first term be a and the common difference be d. From the equations a + 5d = 30 and a + 8d = 45, we can find d = 5.
Correct Answer: A — 5
Learn More →
Q. If the 7th term of an arithmetic progression is 50 and the common difference is 5, what is the first term?
Show solution
Solution
Using the formula for the nth term, a + 6d = 50. Substituting d = 5 gives a + 30 = 50, hence a = 20.
Correct Answer: B — 30
Learn More →
Q. If the activation energy of a reaction is increased, what happens to the rate constant k?
A.
Increases
B.
Decreases
C.
Remains the same
D.
Becomes zero
Show solution
Solution
According to the Arrhenius equation, an increase in activation energy results in a decrease in the rate constant k.
Correct Answer: B — Decreases
Learn More →
Q. If the amplitude of a damped oscillator decreases to half its value in 5 seconds, what is the damping ratio?
A.
0.1
B.
0.2
C.
0.3
D.
0.4
Show solution
Solution
Using the formula A(t) = A_0 e^(-ζω_nt), we find ζ = 0.2.
Correct Answer: B — 0.2
Learn More →
Q. If the amplitude of a simple harmonic motion is doubled, how does the maximum velocity change?
A.
It doubles
B.
It quadruples
C.
It remains the same
D.
It halves
Show solution
Solution
Maximum velocity V_max = Aω. If A is doubled, V_max also doubles.
Correct Answer: A — It doubles
Learn More →
Q. If the amplitude of a simple harmonic motion is doubled, how does the total energy change?
A.
Remains the same
B.
Doubles
C.
Quadruples
D.
Halves
Show solution
Solution
The total energy E in SHM is given by E = (1/2)kA². If A is doubled, E becomes (1/2)k(2A)² = 4(1/2)kA², which is quadrupled.
Correct Answer: C — Quadruples
Learn More →
Q. If the amplitude of a simple harmonic motion is doubled, what happens to the total energy of the system? (2022)
A.
It remains the same
B.
It doubles
C.
It quadruples
D.
It halves
Show solution
Solution
Total energy (E) in SHM is proportional to the square of the amplitude (A). If A is doubled, E becomes 4A^2, hence it quadruples.
Correct Answer: C — It quadruples
Learn More →
Q. If the amplitude of a simple harmonic motion is halved, how does the maximum velocity change?
A.
Halved
B.
Doubled
C.
Remains the same
D.
Quadrupled
Show solution
Solution
Maximum velocity V_max = ωA. If A is halved, V_max is also halved.
Correct Answer: A — Halved
Learn More →
Q. If the amplitude of a simple harmonic oscillator is doubled, how does the total energy change?
A.
Remains the same
B.
Doubles
C.
Quadruples
D.
Halves
Show solution
Solution
The total energy in simple harmonic motion is proportional to the square of the amplitude. If amplitude is doubled, energy increases by a factor of 2^2 = 4.
Correct Answer: C — Quadruples
Learn More →
Q. If the amplitude of a simple harmonic oscillator is doubled, what happens to its total energy?
A.
It remains the same
B.
It doubles
C.
It quadruples
D.
It halves
Show solution
Solution
The total energy of a simple harmonic oscillator is proportional to the square of the amplitude. If the amplitude is doubled, the energy increases by a factor of 2^2 = 4.
Correct Answer: C — It quadruples
Learn More →
Showing 5551 to 5580 of 19617 (654 Pages)