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Q. If a charge of +1 µC is placed in an electric field of 1000 N/C, what is the force experienced by the charge? (2019)

A. 0.001 N
B. 1 N
C. 10 N
D. 0.1 N

Solution

Force F = qE = (1 × 10^-6 C) * (1000 N/C) = 0.001 N.

Correct Answer: A — 0.001 N

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Q. If a charge of +1 µC is placed in an electric field of 2000 N/C, what is the force acting on the charge? (2021)

A. 0.002 N
B. 0.2 N
C. 2 N
D. 20 N

Solution

Force F = qE = (1 × 10^-6 C) * (2000 N/C) = 0.002 N.

Correct Answer: B — 0.2 N

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Q. If a charge of +10 μC is placed in an electric field of strength 200 N/C, what is the force experienced by the charge? (2019)

A. 200 N
B. 2 N
C. 20 N
D. 0.5 N

Solution

Force F = qE = (10 × 10^-6 C) * (200 N/C) = 2 N.

Correct Answer: C — 20 N

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Q. If a charge of +2μC is placed in an electric field of 1000 N/C, what is the force experienced by the charge? (2023)

A. 2 N
B. 0.002 N
C. 2000 N
D. 0.2 N

Solution

The force (F) on a charge in an electric field is given by F = qE. Here, F = 2μC * 1000 N/C = 2 N.

Correct Answer: A — 2 N

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Q. If a charge of +2μC is placed in an electric field of 500 N/C, what is the force experienced by the charge? (2022)

A. 1000 N
B. 250 N
C. 500 N
D. 2000 N

Solution

The force (F) on a charge in an electric field is given by F = qE. Here, F = 2μC * 500 N/C = 1000 N.

Correct Answer: A — 1000 N

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Q. If a charge of +2μC is placed in an electric field of strength 1000 N/C, what is the force acting on the charge? (2023)

A. 2 N
B. 0.002 N
C. 2000 N
D. 0.2 N

Solution

The force (F) on a charge in an electric field is given by F = qE. Here, F = (2 * 10^-6 C)(1000 N/C) = 2 N.

Correct Answer: A — 2 N

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Q. If a charge of +2μC is placed in an electric field of strength 500 N/C, what is the force experienced by the charge? (2022)

A. 1000 N
B. 250 N
C. 500 N
D. 2000 N

Solution

The force (F) on a charge in an electric field is given by F = qE. Here, F = 2μC * 500 N/C = 1000 N.

Correct Answer: A — 1000 N

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Q. If a charge of 5 μC is placed in an electric field of 2000 N/C, what is the force experienced by the charge? (2023)

A. 10 N
B. 1 N
C. 0.1 N
D. 100 N

Solution

The force (F) on a charge in an electric field is given by F = qE. Here, F = 5 × 10^-6 C * 2000 N/C = 10 N.

Correct Answer: A — 10 N

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Q. If a circle has a circumference of 31.4 cm, what is its radius? (2022)

A. 5 cm
B. 10 cm
C. 15 cm
D. 20 cm

Solution

Circumference = 2πr; 31.4 = 2 * π * r; r = 31.4 / (2 * π) = 5 cm.

Correct Answer: A — 5 cm

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Q. If a circle has a circumference of 62.8 cm, what is its radius? (2018)

A. 10 cm
B. 20 cm
C. 15 cm
D. 5 cm

Solution

Circumference = 2πr; 62.8 = 2 * π * r; r = 62.8 / (2 * π) = 10 cm.

Correct Answer: A — 10 cm

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Q. If a circle has a radius of 10 m, what is the diameter? (2021)

A. 5 m
B. 10 m
C. 20 m
D. 15 m

Solution

Diameter = 2 * radius = 2 * 10 m = 20 m.

Correct Answer: C — 20 m

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Q. If a circle has a radius of 3 cm, what is its circumference? (Use π = 3.14) (2023)

A. 6.28 cm
B. 9.42 cm
C. 12.56 cm
D. 15.70 cm

Solution

Circumference = 2πr = 2 * 3.14 * 3 = 18.84 cm.

Correct Answer: C — 12.56 cm

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Q. If a circle has a radius of 4 cm, what is its circumference? (Use π = 3.14) (2023)

A. 12.56 cm
B. 25.12 cm
C. 50.24 cm
D. 6.28 cm

Solution

Circumference = 2πr = 2 * 3.14 * 4 cm = 25.12 cm.

Correct Answer: A — 12.56 cm

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Q. If a circle has a radius of 4 cm, what is its diameter? (2022)

A. 4 cm
B. 8 cm
C. 12 cm
D. 16 cm

Solution

Diameter = 2 * radius = 2 * 4 cm = 8 cm.

Correct Answer: B — 8 cm

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Q. If a circle's radius is tripled, by what factor does the area increase? (2019)

A. 2
B. 3
C. 6
D. 9

Solution

Area = πr²; If r is tripled, new area = π(3r)² = 9πr²; Factor = 9.

Correct Answer: D — 9

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Q. If a circle's radius is tripled, how does its area change? (2021)

A. Increases by 3 times
B. Increases by 6 times
C. Increases by 9 times
D. Remains the same

Solution

Area = πr². If radius is tripled, new area = π(3r)² = 9πr², which is 9 times the original area.

Correct Answer: C — Increases by 9 times

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Q. If a circle's radius is tripled, how does its area change? (2023) 2023

A. Increases by 3 times
B. Increases by 6 times
C. Increases by 9 times
D. Remains the same

Solution

Area = πr². If radius is tripled, new area = π(3r)² = 9πr², which is 9 times the original area.

Correct Answer: C — Increases by 9 times

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Q. If a circuit has a 12V battery and a total resistance of 3Ω, what is the power consumed by the circuit? (2023)

A. 12W
B. 24W
C. 36W
D. 48W

Solution

Power P = V^2/R = 12^2/3 = 144/3 = 48W.

Correct Answer: B — 24W

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Q. If a circuit has a current of 3 A and a resistance of 4 ohms, what is the power consumed? (2020)

A. 12 W
B. 7 W
C. 15 W
D. 9 W

Solution

Power (P) is calculated using P = I^2 * R = (3 A)^2 * 4 ohms = 12 W.

Correct Answer: A — 12 W

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Q. If a circuit has a current of 3 A and a resistance of 4 Ω, what is the power consumed? (2020)

A. 12 W
B. 7 W
C. 3 W
D. 1 W

Solution

Power (P) can be calculated using P = I² × R = (3 A)² × 4 Ω = 12 W.

Correct Answer: A — 12 W

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Q. If a circuit has a current of 5 A and a resistance of 10 ohms, what is the voltage across the circuit? (2019)

A. 15 V
B. 50 V
C. 5 V
D. 10 V

Solution

Using Ohm's Law, V = I * R = 5 A * 10 Ω = 50 V.

Correct Answer: B — 50 V

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Q. If a circuit has a current of 5A and a resistance of 10Ω, what is the voltage across the resistor? (2022)

A. 10V
B. 20V
C. 30V
D. 50V

Solution

Using Ohm's Law, V = I * R = 5A * 10Ω = 50V.

Correct Answer: B — 20V

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Q. If a circuit has a resistance of 12Ω and a current of 3A, what is the power consumed in the circuit? (2022)

A. 36W
B. 24W
C. 12W
D. 9W

Solution

Power (P) can be calculated using the formula P = I^2 * R = (3A)^2 * 12Ω = 36W.

Correct Answer: A — 36W

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Q. If a circuit has a resistance of 5 ohms and a current of 2 A, what is the voltage? (2014)

A. 10 V
B. 5 V
C. 2 V
D. 1 V

Solution

Using Ohm's Law, V = I × R = 2 A × 5 Ω = 10 V.

Correct Answer: A — 10 V

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Q. If a circuit has a total power of 100W and a voltage of 50V, what is the current flowing through the circuit? (2023)

A. 1A
B. 2A
C. 3A
D. 4A

Solution

Using the power formula P = VI, I = P/V = 100W/50V = 2A.

Correct Answer: B — 2A

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Q. If a circuit has a total resistance of 10 ohms and a current of 3 A flows through it, what is the voltage across the circuit? (2020)

A. 30 V
B. 10 V
C. 3 V
D. 0.3 V

Solution

Using Ohm's law, V = I × R = 3 A × 10 Ω = 30 V.

Correct Answer: A — 30 V

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Q. If a circuit has a total resistance of 10Ω and a current of 3A, what is the voltage across the circuit? (2021)

A. 10V
B. 20V
C. 30V
D. 40V

Solution

Using Ohm's law, V = I * R = 3A * 10Ω = 30V.

Correct Answer: C — 30V

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Q. If a circuit has a total resistance of 12Ω and a current of 1.5A flows through it, what is the voltage across the circuit? (2022)

A. 18V
B. 12V
C. 15V
D. 10V

Solution

Using Ohm's law, V = IR = 1.5A * 12Ω = 18V.

Correct Answer: A — 18V

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Q. If a circuit has a total resistance of 12Ω and a current of 1.5A, what is the voltage across the circuit? (2021)

A. 18V
B. 12V
C. 15V
D. 10V

Solution

Using Ohm's law, V = IR = 1.5A * 12Ω = 18V.

Correct Answer: A — 18V

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Q. If a circuit has a total resistance of 12Ω and a current of 2A, what is the total voltage in the circuit? (2023)

A. 12V
B. 24V
C. 36V
D. 48V

Solution

Using Ohm's law, V = I * R = 2A * 12Ω = 24V.

Correct Answer: B — 24V

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