Q. What is the term used for the study of living organisms? (2021)
A.
Biology
B.
Zoology
C.
Botany
D.
Ecology
Show solution
Solution
Biology is the term used for the study of living organisms.
Correct Answer: A — Biology
Learn More →
Q. What is the thermal conductivity of a material if a 1 m² area of it conducts 100 J of heat in 10 seconds with a temperature difference of 20°C?
A.
2 W/m°C
B.
5 W/m°C
C.
10 W/m°C
D.
20 W/m°C
Show solution
Solution
Using the formula Q = kA(T1-T2)t, we find k = Q / (A(T1-T2)t) = 100 J / (1 m² * 20°C * 10 s) = 0.5 W/m°C.
Correct Answer: B — 5 W/m°C
Learn More →
Q. What is the time period of a wave with a frequency of 20 Hz? (2022)
A.
0.05 s
B.
0.1 s
C.
0.2 s
D.
0.5 s
Show solution
Solution
The time period T is the reciprocal of frequency, T = 1/f. Thus, T = 1/20 Hz = 0.05 s.
Correct Answer: B — 0.1 s
Learn More →
Q. What is the total current flowing in a circuit with three resistors in parallel, each carrying 2 A? (2021)
A.
2 A
B.
4 A
C.
6 A
D.
8 A
Show solution
Solution
In parallel, the total current is the sum of the currents: 2 A + 2 A + 2 A = 6 A.
Correct Answer: C — 6 A
Learn More →
Q. What is the total current flowing in a parallel circuit with two branches carrying 2 A and 3 A respectively? (2023)
A.
5 A
B.
6 A
C.
1 A
D.
2.5 A
Show solution
Solution
In a parallel circuit, the total current is the sum of the currents in each branch: 2 A + 3 A = 5 A.
Correct Answer: A — 5 A
Learn More →
Q. What is the total current flowing through a circuit with a 9V battery and a total resistance of 3Ω? (2022)
Show solution
Solution
Using Ohm's law, I = V/R = 9V / 3Ω = 3A.
Correct Answer: B — 2A
Learn More →
Q. What is the total current in a circuit with a 12V battery and two 6Ω resistors in series? (2021)
Show solution
Solution
Total resistance R = 6 + 6 = 12Ω. Current I = V/R = 12V/12Ω = 1A.
Correct Answer: B — 2A
Learn More →
Q. What is the total current in a circuit with a 15V battery and two 5Ω resistors in series? (2023)
Show solution
Solution
Total resistance R = 5Ω + 5Ω = 10Ω; I = V/R = 15V / 10Ω = 1.5A.
Correct Answer: B — 2A
Learn More →
Q. What is the total current in a circuit with a 9V battery and two 3Ω resistors in series? (2021)
Show solution
Solution
Total resistance R = 3Ω + 3Ω = 6Ω. Current I = V/R = 9V/6Ω = 1.5A.
Correct Answer: A — 1A
Learn More →
Q. What is the total current in a circuit with a voltage of 240V, resistance of 20 ohms, and inductive reactance of 30 ohms? (2022)
A.
8 A
B.
6 A
C.
4 A
D.
10 A
Show solution
Solution
Z = √(R² + Xl²) = √(20² + 30²) = √(400 + 900) = √1300 = 36.06 ohms. I = V/Z = 240/36.06 = 6.66 A.
Correct Answer: B — 6 A
Learn More →
Q. What is the total current in a circuit with two branches, one carrying 2A and the other 3A? (2021)
Show solution
Solution
In parallel circuits, the total current is the sum of the currents in each branch: 2A + 3A = 5A.
Correct Answer: A — 5A
Learn More →
Q. What is the total current in a circuit with two branches, one carrying 3A and the other 5A? (2021)
Show solution
Solution
In parallel circuits, the total current is the sum of the currents in each branch: 3A + 5A = 8A.
Correct Answer: D — 8A
Learn More →
Q. What is the total current in a circuit with two branches, one with 3A and the other with 2A? (2022)
Show solution
Solution
In parallel circuits, the total current is the sum of the currents in each branch: I_total = 3A + 2A = 5A.
Correct Answer: A — 5A
Learn More →
Q. What is the total current in a parallel circuit with two branches carrying 2 A and 3 A respectively? (2023)
A.
5 A
B.
6 A
C.
1 A
D.
2.5 A
Show solution
Solution
In a parallel circuit, the total current is the sum of the currents in the branches: 2 A + 3 A = 5 A.
Correct Answer: A — 5 A
Learn More →
Q. What is the total current in a parallel circuit with two branches carrying 3A and 5A? (2020)
Show solution
Solution
In a parallel circuit, the total current (I_total) is the sum of the currents in each branch: I_total = 3A + 5A = 8A.
Correct Answer: A — 8A
Learn More →
Q. What is the total current in a parallel circuit with two branches, one with 5A and the other with 3A? (2022)
A.
8A
B.
15A
C.
2.5A
D.
5A
Show solution
Solution
Total current in parallel = I1 + I2 = 5A + 3A = 8A.
Correct Answer: A — 8A
Learn More →
Q. What is the total current in a series circuit with a 10Ω resistor and a 20Ω inductor connected to a 100V AC source at 50Hz? (2023)
Show solution
Solution
Total impedance Z = √(R² + (ωL)²) = √(10² + (2π(50)(20))²). Calculate to find current.
Correct Answer: B — 4A
Learn More →
Q. What is the total mechanical energy of a simple harmonic oscillator at maximum displacement? (2022)
A.
Zero
B.
Maximum
C.
Minimum
D.
Constant
Show solution
Solution
At maximum displacement, the total mechanical energy of a simple harmonic oscillator is at its maximum, as all energy is potential.
Correct Answer: B — Maximum
Learn More →
Q. What is the total mechanical energy of a simple harmonic oscillator with a mass of 1 kg, amplitude of 0.1 m, and spring constant of 100 N/m? (2022)
A.
0.5 J
B.
1 J
C.
2 J
D.
4 J
Show solution
Solution
The total mechanical energy E is given by E = (1/2)kA². Therefore, E = (1/2)(100)(0.1)² = 0.5 J.
Correct Answer: B — 1 J
Learn More →
Q. What is the total mechanical energy of a system at the highest point of a projectile's trajectory?
A.
Maximum potential energy
B.
Maximum kinetic energy
C.
Zero energy
D.
Constant energy
Show solution
Solution
At the highest point of a projectile's trajectory, the kinetic energy is minimum (zero at the peak) and potential energy is maximum, thus total mechanical energy is maximum potential energy.
Correct Answer: A — Maximum potential energy
Learn More →
Q. What is the total mechanical energy of an object in free fall just before it hits the ground? (2022)
A.
Zero
B.
Potential energy only
C.
Kinetic energy only
D.
Total energy is conserved
Show solution
Solution
The total mechanical energy of an object in free fall is conserved, meaning it remains constant as potential energy converts to kinetic energy.
Correct Answer: D — Total energy is conserved
Learn More →
Q. What is the total number of moles in 2 liters of a 3 M solution? (2022)
A.
3 moles
B.
6 moles
C.
1.5 moles
D.
4 moles
Show solution
Solution
Moles = Molarity * Volume = 3 mol/L * 2 L = 6 moles.
Correct Answer: B — 6 moles
Learn More →
Q. What is the total power consumed in a circuit with a power factor of 0.6, if the apparent power is 100 VA? (2023)
A.
60 W
B.
100 W
C.
40 W
D.
80 W
Show solution
Solution
The real power (P) can be calculated using P = Power Factor × Apparent Power. Therefore, P = 0.6 × 100 VA = 60 W.
Correct Answer: A — 60 W
Learn More →
Q. What is the total power consumed in a circuit with two 10Ω resistors in series connected to a 20V source? (2020)
A.
20W
B.
40W
C.
10W
D.
30W
Show solution
Solution
Total resistance R = 10Ω + 10Ω = 20Ω. Power P = V²/R = 20² / 20 = 20W.
Correct Answer: B — 40W
Learn More →
Q. What is the total power consumed in a circuit with two 5Ω resistors in series connected to a 30V battery? (2023)
A.
90W
B.
60W
C.
30W
D.
45W
Show solution
Solution
Total resistance R = 5Ω + 5Ω = 10Ω; Power P = V²/R = 30²/10 = 90W.
Correct Answer: B — 60W
Learn More →
Q. What is the total resistance in a circuit with a 10Ω resistor and a 20Ω resistor in series? (2022)
A.
30Ω
B.
20Ω
C.
10Ω
D.
15Ω
Show solution
Solution
In series, R_eq = R1 + R2 = 10Ω + 20Ω = 30Ω.
Correct Answer: A — 30Ω
Learn More →
Q. What is the total resistance in a circuit with a 10Ω resistor in series with a 20Ω resistor? (2022)
A.
10Ω
B.
20Ω
C.
30Ω
D.
15Ω
Show solution
Solution
In series, R_eq = R1 + R2 = 10Ω + 20Ω = 30Ω.
Correct Answer: C — 30Ω
Learn More →
Q. What is the total resistance in a series circuit with resistors of 2Ω, 3Ω, and 5Ω?
Show solution
Solution
In a series circuit, total resistance (R_total) is the sum of individual resistances: R_total = R1 + R2 + R3 = 2Ω + 3Ω + 5Ω = 10Ω.
Correct Answer: A — 10Ω
Learn More →
Q. What is the total resistance of two 4Ω resistors connected in series? (2020)
Show solution
Solution
In series, R_eq = R1 + R2 = 4Ω + 4Ω = 8Ω.
Correct Answer: B — 8Ω
Learn More →
Q. What is the total resistance of two resistors of 4Ω and 6Ω connected in parallel? (2021)
A.
2.4Ω
B.
10Ω
C.
24Ω
D.
1.5Ω
Show solution
Solution
For parallel resistors, 1/R_eq = 1/R1 + 1/R2 = 1/4 + 1/6. Finding a common denominator gives R_eq = 2.4Ω.
Correct Answer: A — 2.4Ω
Learn More →
Showing 3211 to 3240 of 4667 (156 Pages)