Q. If a circuit has a total voltage of 24V and a total resistance of 8Ω, what is the total current flowing through the circuit? (2023)
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Solution
Using Ohm's law, I = V/R = 24V/8Ω = 3A.
Correct Answer: C — 4A
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Q. If a circuit has a voltage of 12 V and a resistance of 3 ohms, what is the current flowing through the circuit? (2022)
A.
4 A
B.
3 A
C.
2 A
D.
1 A
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Solution
Using Ohm's law (I = V/R), I = 12 V / 3 Ω = 4 A.
Correct Answer: A — 4 A
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Q. If a circuit has a voltage of 24V and a current of 3A, what is the resistance? (2022)
A.
4Ω
B.
6Ω
C.
8Ω
D.
12Ω
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Solution
Using Ohm's Law, R = V / I = 24V / 3A = 8Ω.
Correct Answer: B — 6Ω
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Q. If a circuit has a voltage of 24V and a current of 6A, what is the resistance? (2022)
A.
2Ω
B.
4Ω
C.
6Ω
D.
8Ω
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Solution
Using Ohm's Law, R = V/I = 24V / 6A = 4Ω.
Correct Answer: D — 8Ω
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Q. If a force of 10 N is applied to a mass of 2 kg, what will be the acceleration of the mass? (2019)
A.
2 m/s²
B.
5 m/s²
C.
10 m/s²
D.
20 m/s²
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Solution
Using F = ma, a = F/m = 10 N / 2 kg = 5 m/s².
Correct Answer: B — 5 m/s²
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Q. If a force of 10 N moves an object 5 m in the direction of the force, what is the work done? (2020)
A.
50 J
B.
10 J
C.
5 J
D.
25 J
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Solution
Work Done (W) = Force (F) * Distance (d) = 10 N * 5 m = 50 J
Correct Answer: A — 50 J
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Q. If a force of 50 N is applied to a 25 kg object, what is the acceleration of the object? (2022)
A.
1 m/s²
B.
2 m/s²
C.
3 m/s²
D.
4 m/s²
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Solution
Using F = ma, a = F/m = 50 N / 25 kg = 2 m/s².
Correct Answer: B — 2 m/s²
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Q. If a force of 50 N is applied to a 25 kg object, what is the resulting acceleration? (2022)
A.
1 m/s²
B.
2 m/s²
C.
3 m/s²
D.
4 m/s²
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Solution
Acceleration = Force / Mass = 50 N / 25 kg = 2 m/s².
Correct Answer: B — 2 m/s²
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Q. If a force of 50 N is applied to a 25 kg object, what will be its acceleration? (2022)
A.
1 m/s²
B.
2 m/s²
C.
3 m/s²
D.
4 m/s²
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Solution
Acceleration = Force / Mass = 50 N / 25 kg = 2 m/s².
Correct Answer: B — 2 m/s²
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Q. If a machine does 200 J of work in 10 seconds, what is its power? (2022)
A.
20 W
B.
10 W
C.
30 W
D.
40 W
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Solution
Power (P) = Work / Time = 200 J / 10 s = 20 W
Correct Answer: A — 20 W
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Q. If a machine does 200 J of work in 5 seconds, what is its power? (2022)
A.
40 W
B.
50 W
C.
20 W
D.
30 W
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Solution
Power (P) = Work Done (W) / Time (t) = 200 J / 5 s = 40 W
Correct Answer: B — 50 W
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Q. If a machine does 2000 J of work in 5 seconds, what is its power? (2022)
A.
400 W
B.
200 W
C.
100 W
D.
500 W
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Solution
Power (P) = Work Done / Time = 2000 J / 5 s = 400 W
Correct Answer: A — 400 W
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Q. If a material has a high shear modulus, what does it indicate about the material? (2023)
A.
It is very elastic
B.
It is very ductile
C.
It resists shear deformation
D.
It is very brittle
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Solution
A high shear modulus indicates that the material resists shear deformation.
Correct Answer: C — It resists shear deformation
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Q. If a material has a shear modulus of 80 GPa and a shear stress of 40 MPa is applied, what is the shear strain? (2023)
A.
0.0005
B.
0.005
C.
0.5
D.
0.05
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Solution
Shear strain (γ) = Shear stress (τ) / Shear modulus (G) = 40 MPa / 80 GPa = 0.0005.
Correct Answer: A — 0.0005
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Q. If a measurement has a relative error of 5%, what does this indicate? (2022)
A.
The measurement is very accurate
B.
The measurement is very precise
C.
The measurement is off by 5% of the true value
D.
The measurement is exact
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Solution
A relative error of 5% indicates that the measurement is off by 5% of the true value.
Correct Answer: C — The measurement is off by 5% of the true value
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Q. If a measurement is accurate but not precise, what does it imply? (2019)
A.
All measurements are close to each other
B.
Measurements are close to the true value
C.
Measurements vary widely
D.
None of the above
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Solution
Accuracy refers to how close a measurement is to the true value.
Correct Answer: B — Measurements are close to the true value
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Q. If a measurement is accurate, it means: (2019)
A.
It is close to the true value
B.
It is consistent
C.
It has a small error
D.
It is precise
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Solution
Accuracy refers to how close a measured value is to the true value.
Correct Answer: A — It is close to the true value
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Q. If a resistor has a current of 2A flowing through it and a voltage of 10V across it, what is the resistance? (2023)
A.
2Ω
B.
5Ω
C.
10Ω
D.
20Ω
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Solution
Using Ohm's Law, R = V / I = 10V / 2A = 5Ω.
Correct Answer: B — 5Ω
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Q. If a resistor has a resistance of 10Ω and a current of 2A flows through it, what is the voltage across the resistor? (2023)
A.
5V
B.
10V
C.
20V
D.
30V
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Solution
Using Ohm's Law, V = I * R = 2A * 10Ω = 20V.
Correct Answer: C — 20V
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Q. If a resistor has a resistance of 8Ω and the current flowing through it is 4A, what is the power dissipated by the resistor? (2022)
A.
16W
B.
32W
C.
64W
D.
8W
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Solution
Power (P) can be calculated using P = I^2 * R = (4A)^2 * 8Ω = 16 * 8 = 128W.
Correct Answer: B — 32W
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Q. If a resistor has a resistance of 8Ω and the current flowing through it is 4A, what is the voltage across the resistor? (2022)
A.
32V
B.
16V
C.
8V
D.
4V
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Solution
Using Ohm's Law, V = I * R = 4A * 8Ω = 32V.
Correct Answer: B — 16V
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Q. If a ruler has a least count of 0.1 cm, what is the maximum error in measurement? (2023)
A.
0.05 cm
B.
0.1 cm
C.
0.2 cm
D.
0.01 cm
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Solution
The maximum error is typically taken as the least count of the measuring instrument, which is 0.1 cm.
Correct Answer: B — 0.1 cm
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Q. If a torque of 10 Nm is applied to a body with a moment of inertia of 2 kg·m², what is the angular acceleration? (2022)
A.
5 rad/s²
B.
10 rad/s²
C.
2 rad/s²
D.
20 rad/s²
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Solution
Using the formula τ = Iα, we have α = τ/I = 10 Nm / 2 kg·m² = 5 rad/s².
Correct Answer: A — 5 rad/s²
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Q. If a wave has a frequency of 50 Hz and a wavelength of 4 m, what is its speed? (2019)
A.
100 m/s
B.
200 m/s
C.
50 m/s
D.
25 m/s
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Solution
The speed of a wave can be calculated using the formula v = f × λ. Here, v = 50 Hz × 4 m = 200 m/s.
Correct Answer: A — 100 m/s
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Q. If a wave has a speed of 300 m/s and a frequency of 150 Hz, what is its wavelength? (2023)
A.
1 m
B.
2 m
C.
3 m
D.
4 m
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Solution
Using the wave equation v = fλ, we can rearrange it to find λ = v/f. Thus, λ = 300 m/s / 150 Hz = 2 m.
Correct Answer: B — 2 m
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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
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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
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Q. If the amplitude of a wave is increased, what effect does it have on the energy carried by the wave? (2019)
A.
Energy decreases
B.
Energy remains the same
C.
Energy increases
D.
Energy becomes zero
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Solution
The energy carried by a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
Correct Answer: C — Energy increases
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Q. If the amplitude of a wave is increased, what effect does it have on the energy of the wave? (2022)
A.
Energy decreases
B.
Energy remains the same
C.
Energy increases
D.
Energy becomes zero
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Solution
The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
Correct Answer: C — Energy increases
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Q. If the amplitude of a wave is increased, what happens to its energy? (2019)
A.
Decreases
B.
Increases
C.
Remains the same
D.
Becomes zero
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Solution
The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
Correct Answer: B — Increases
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Q. If the amplitude of a wave is tripled, what happens to the energy carried by the wave? (2019)
A.
It remains the same
B.
It doubles
C.
It triples
D.
It increases by a factor of nine
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Solution
The energy carried by a wave is proportional to the square of the amplitude. Therefore, if the amplitude is tripled, the energy increases by a factor of 3^2 = 9.
Correct Answer: D — It increases by a factor of nine
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