Q. What is the potential difference between two points A and B if the electric field is 5 N/C and the distance between them is 3 m?
A.
15 V
B.
5 V
C.
3 V
D.
0 V
Show solution
Solution
Potential difference V = E * d = 5 N/C * 3 m = 15 V.
Correct Answer: A — 15 V
Learn More →
Q. What is the potential difference between two points A and B in an electric field of 200 N/C if the distance between them is 0.5 m?
A.
100 V
B.
200 V
C.
50 V
D.
25 V
Show solution
Solution
Potential difference V = E * d = 200 N/C * 0.5 m = 100 V.
Correct Answer: A — 100 V
Learn More →
Q. What is the potential difference between two points A and B in an electric field if the work done in moving a charge of +2C from A to B is 10J?
A.
5 V
B.
10 V
C.
20 V
D.
2 V
Show solution
Solution
V = W/Q = 10 J / 2 C = 5 V.
Correct Answer: B — 10 V
Learn More →
Q. What is the potential difference between two points A and B in an electric field if the work done in moving a charge of 5μC from A to B is 10mJ?
A.
2V
B.
5V
C.
10V
D.
20V
Show solution
Solution
Potential difference V = W/Q = 10mJ / 5μC = 10 × 10^-3 J / 5 × 10^-6 C = 2V.
Correct Answer: B — 5V
Learn More →
Q. What is the potential difference between two points A and B in an electric field if the work done in moving a charge of 5μC from A to B is 0.02 J?
A.
4 V
B.
2 V
C.
10 V
D.
0.1 V
Show solution
Solution
Potential difference V = W/Q = 0.02 J / (5 × 10^-6 C) = 4000 V = 4 V.
Correct Answer: A — 4 V
Learn More →
Q. What is the potential difference between two points in a uniform electric field of strength 200 N/C separated by 3m?
A.
600 V
B.
200 V
C.
300 V
D.
400 V
Show solution
Solution
V = E * d = 200 N/C * 3 m = 600 V.
Correct Answer: A — 600 V
Learn More →
Q. What is the potential difference between two points in an electric field if the work done to move a charge of 2μC is 0.04 J?
A.
20 V
B.
30 V
C.
40 V
D.
50 V
Show solution
Solution
Potential difference V = W/q = 0.04 J / (2 × 10^-6 C) = 20,000 V = 20 V.
Correct Answer: C — 40 V
Learn More →
Q. What is the potential difference between two points in an electric field if the work done in moving a charge of 3 C from one point to another is 15 J?
A.
5 V
B.
10 V
C.
15 V
D.
20 V
Show solution
Solution
Potential difference V = Work done / Charge = 15 J / 3 C = 5 V.
Correct Answer: B — 10 V
Learn More →
Q. What is the potential difference between two points in an electric field if the work done to move a charge of 2C is 10J?
A.
5V
B.
20V
C.
2V
D.
10V
Show solution
Solution
Potential difference V = W/Q = 10J / 2C = 5V.
Correct Answer: B — 20V
Learn More →
Q. What is the potential difference between two points in an electric field if the work done in moving a charge of +2μC between them is 0.04 J?
A.
20 V
B.
10 V
C.
5 V
D.
2 V
Show solution
Solution
V = W/q = 0.04 J / (2 × 10^-6 C) = 20 V.
Correct Answer: A — 20 V
Learn More →
Q. What is the potential difference between two points in an electric field if the work done in moving a charge of +2μC is 0.04 J?
A.
20 V
B.
10 V
C.
5 V
D.
2 V
Show solution
Solution
Potential difference V = W/q = 0.04 J / (2 × 10^-6 C) = 20 V.
Correct Answer: A — 20 V
Learn More →
Q. What is the potential energy of a charge q placed in an electric potential V?
A.
qV
B.
q/V
C.
V/q
D.
q²V
Show solution
Solution
The potential energy U of a charge q in an electric potential V is given by U = qV.
Correct Answer: A — qV
Learn More →
Q. What is the potential energy of a dipole in a uniform electric field E when it is aligned with the field?
A.
-pE
B.
0
C.
pE
D.
pE/2
Show solution
Solution
Potential energy U = -p · E. When aligned, U = -pE.
Correct Answer: A — -pE
Learn More →
Q. What is the potential energy of a mass of 5 kg at a height of 10 m in a gravitational field (g = 9.8 m/s²)?
A.
490 J
B.
980 J
C.
245 J
D.
50 J
Show solution
Solution
Potential energy PE = mgh = 5 kg × 9.8 m/s² × 10 m = 490 J.
Correct Answer: B — 980 J
Learn More →
Q. What is the potential energy of a system of two charges +3μC and +4μC separated by 0.2m?
A.
0.54 J
B.
0.72 J
C.
0.36 J
D.
0.18 J
Show solution
Solution
U = k * (q1 * q2) / r = (9 × 10^9) * (3 × 10^-6 * 4 × 10^-6) / 0.2 = 0.54 J.
Correct Answer: B — 0.72 J
Learn More →
Q. What is the potential energy of a system of two charges +3μC and +5μC separated by 0.2m?
A.
-6.75 J
B.
6.75 J
C.
0.75 J
D.
-0.75 J
Show solution
Solution
Potential energy U = k * (q1 * q2) / r = (9 × 10^9) * (3 × 10^-6) * (5 × 10^-6) / 0.2 = 6.75 J.
Correct Answer: B — 6.75 J
Learn More →
Q. What is the potential energy of a system of two charges +3μC and -5μC separated by 0.3m?
A.
-0.45 J
B.
0.45 J
C.
-0.15 J
D.
0.15 J
Show solution
Solution
Potential energy U = k * q1 * q2 / r = (9 × 10^9) * (3 × 10^-6) * (-5 × 10^-6) / 0.3 = -0.45 J.
Correct Answer: A — -0.45 J
Learn More →
Q. What is the potential energy of a system of two charges +5μC and +10μC separated by 0.2m?
A.
-0.225 J
B.
0.225 J
C.
0.45 J
D.
0.9 J
Show solution
Solution
Potential energy U = k * (q1 * q2) / r = (9 × 10^9) * (5 × 10^-6) * (10 × 10^-6) / 0.2 = 0.225 J.
Correct Answer: B — 0.225 J
Learn More →
Q. What is the potential energy of a system of two charges +q and +q separated by a distance r?
A.
0
B.
k*q²/r
C.
-k*q²/r
D.
2k*q²/r
Show solution
Solution
Potential energy U = k * (q1 * q2) / r = k * (q * q) / r = k*q²/r.
Correct Answer: B — k*q²/r
Learn More →
Q. What is the potential energy of a system of two charges of +1μC and -1μC separated by 0.1m?
A.
-0.09 J
B.
0.09 J
C.
-0.18 J
D.
0.18 J
Show solution
Solution
Potential energy U = k * q1 * q2 / r = (9 × 10^9) * (1 × 10^-6) * (-1 × 10^-6) / 0.1 = -0.09 J.
Correct Answer: A — -0.09 J
Learn More →
Q. What is the potential energy of a system of two point charges +q and -q separated by a distance r?
A.
0
B.
kq²/r
C.
-kq²/r
D.
kq/r
Show solution
Solution
The potential energy U of a system of two point charges is given by U = k(q1q2)/r = -kq²/r for +q and -q.
Correct Answer: C — -kq²/r
Learn More →
Q. What is the potential energy of a system of two point charges q1 and q2 separated by a distance r?
A.
k * q1 * q2 / r
B.
k * q1 * q2 * r
C.
k * (q1 + q2) / r
D.
k * (q1 - q2) / r
Show solution
Solution
The potential energy U of a system of two point charges is given by U = k * q1 * q2 / r.
Correct Answer: A — k * q1 * q2 / r
Learn More →
Q. What is the potential energy stored in a spring when it is compressed by a distance x?
A.
1/2 kx
B.
1/2 kx²
C.
kx
D.
kx²
Show solution
Solution
The potential energy (PE) stored in a spring is given by PE = 1/2 kx², where k is the spring constant and x is the displacement.
Correct Answer: B — 1/2 kx²
Learn More →
Q. What is the power consumed by a 10 ohm resistor when a current of 2 A flows through it?
A.
20 W
B.
40 W
C.
10 W
D.
5 W
Show solution
Solution
Power P = I^2 * R = (2 A)^2 * 10Ω = 4 * 10 = 40 W.
Correct Answer: B — 40 W
Learn More →
Q. What is the power consumed by a 10 ohm resistor when a current of 3 A flows through it?
A.
30 W
B.
90 W
C.
60 W
D.
15 W
Show solution
Solution
Power P = I^2 * R = (3 A)^2 * 10 ohms = 9 * 10 = 90 W.
Correct Answer: B — 90 W
Learn More →
Q. What is the power consumed by a 10Ω resistor when a current of 2A flows through it?
A.
20W
B.
40W
C.
10W
D.
5W
Show solution
Solution
Power P = I^2 * R = (2A)^2 * 10Ω = 4A^2 * 10Ω = 40W.
Correct Answer: A — 20W
Learn More →
Q. What is the power consumed by a 12 V battery supplying a current of 2 A?
A.
24 W
B.
12 W
C.
6 W
D.
48 W
Show solution
Solution
Power is given by P = V * I = 12 V * 2 A = 24 W.
Correct Answer: A — 24 W
Learn More →
Q. What is the power consumed by a 5 ohm resistor carrying a current of 3 A?
A.
15 W
B.
9 W
C.
5 W
D.
3 W
Show solution
Solution
Power P = I^2 * R = (3 A)^2 * 5 ohms = 9 * 5 = 45 W.
Correct Answer: A — 15 W
Learn More →
Q. What is the power consumed by a 5 ohm resistor when a current of 2A flows through it?
A.
10W
B.
20W
C.
5W
D.
15W
Show solution
Solution
Power P = I^2 * R = (2A)^2 * 5 ohms = 4 * 5 = 20W.
Correct Answer: B — 20W
Learn More →
Q. What is the power consumed by a 5 ohm resistor when a current of 3 A flows through it?
A.
15 W
B.
9 W
C.
5 W
D.
3 W
Show solution
Solution
Power P = I^2 * R = (3 A)^2 * 5 ohms = 9 * 5 = 45 W.
Correct Answer: A — 15 W
Learn More →
Showing 7681 to 7710 of 10700 (357 Pages)
