Q. What is the electric potential at a distance of 3 m from a charge of 10 μC?
-
A.
3000 V
-
B.
9000 V
-
C.
6000 V
-
D.
1000 V
Solution
V = k * q / r = (9 × 10^9 N m²/C²) * (10 × 10^-6 C) / (3 m) = 30000 V / 3 = 9000 V.
Correct Answer: B — 9000 V
Learn More →
Q. What is the electric potential at a distance of 4 m from a charge of 8 μC? (2000)
-
A.
4500 V
-
B.
1800 V
-
C.
2000 V
-
D.
None of the above
Solution
Electric potential V = k * q / r = (9 × 10^9 N m²/C²) * (8 × 10^-6 C) / (4 m) = 1800 V.
Correct Answer: B — 1800 V
Learn More →
Q. What is the electric potential at a point 0.3m away from a charge of +4μC?
-
A.
12000 V
-
B.
3000 V
-
C.
6000 V
-
D.
9000 V
Solution
V = k * q / r = (9 × 10^9) * (4 × 10^-6) / 0.3 = 12000 V.
Correct Answer: A — 12000 V
Learn More →
Q. What is the electric potential at a point 0.4 m away from a charge of +5 µC?
-
A.
45 V
-
B.
50 V
-
C.
55 V
-
D.
60 V
Solution
V = k * q / r = (9 × 10^9) * (5 × 10^-6) / 0.4 = 112.5 V.
Correct Answer: B — 50 V
Learn More →
Q. What is the electric potential at a point due to a charge Q at a distance r? (2021)
-
A.
kQ/r
-
B.
kQr
-
C.
kQ/r^2
-
D.
0
Solution
The electric potential (V) at a distance r from a point charge Q is given by V = kQ/r.
Correct Answer: A — kQ/r
Learn More →
Q. What is the electric potential at a point due to a point charge?
-
A.
kQ/r
-
B.
Q/(4πε₀r²)
-
C.
kQ/(4πε₀r)
-
D.
Q/(4πr²)
Solution
The electric potential V at a distance r from a point charge Q is given by V = kQ/r, where k is Coulomb's constant.
Correct Answer: A — kQ/r
Learn More →
Q. What is the electric potential at a point due to a positive point charge?
-
A.
Zero
-
B.
Positive
-
C.
Negative
-
D.
Depends on distance
Solution
The electric potential due to a positive point charge is positive and decreases with distance from the charge.
Correct Answer: B — Positive
Learn More →
Q. What is the electric potential at a point in space where the electric field is zero?
-
A.
Zero
-
B.
Positive
-
C.
Negative
-
D.
Undefined
Solution
The electric potential can be positive or negative; it is not necessarily zero when the electric field is zero.
Correct Answer: B — Positive
Learn More →
Q. What is the electric potential due to a dipole at a point along the axial line at a distance 'r' from the center of the dipole?
-
A.
0
-
B.
k * p / r²
-
C.
k * p / r
-
D.
k * p / 2r
Solution
The potential V = k * p / r, where p is the dipole moment.
Correct Answer: C — k * p / r
Learn More →
Q. What is the electric potential due to a point charge at a distance r?
-
A.
k * q / r
-
B.
k * q / r^2
-
C.
k * q * r
-
D.
k * q * r^2
Solution
The electric potential V due to a point charge q at a distance r is given by V = k * q / r.
Correct Answer: A — k * q / r
Learn More →
Q. What is the electric potential due to a point charge of 5 μC at a distance of 2 m?
-
A.
0 V
-
B.
2250 V
-
C.
1125 V
-
D.
4500 V
Solution
Electric potential V = k * q / r = (9 × 10^9 N m²/C²) * (5 × 10^-6 C) / (2 m) = 2250 V.
Correct Answer: B — 2250 V
Learn More →
Q. What is the electric potential energy of a charge of 1 C at a point where the electric potential is 10 V?
-
A.
10 J
-
B.
1 J
-
C.
0 J
-
D.
100 J
Solution
Electric potential energy U = q * V = 1 C * 10 V = 10 J.
Correct Answer: A — 10 J
Learn More →
Q. What is the electric potential energy of a charge of 1 C placed in an electric field of 10 N/C at a distance of 2 m?
-
A.
20 J
-
B.
10 J
-
C.
5 J
-
D.
2 J
Solution
Electric potential energy U = q * V = q * E * d = 1 C * 10 N/C * 2 m = 20 J.
Correct Answer: A — 20 J
Learn More →
Q. What is the electric potential energy of a charge of 1 μC placed in an electric potential of 200 V?
-
A.
0.2 mJ
-
B.
0.1 mJ
-
C.
0.4 mJ
-
D.
0.5 mJ
Solution
Electric potential energy U = q * V = 1 × 10^-6 C * 200 V = 0.2 mJ.
Correct Answer: A — 0.2 mJ
Learn More →
Q. What is the electric potential energy of a system of two charges +q and -q separated by a distance r?
-
A.
0
-
B.
kq²/r
-
C.
-kq²/r
-
D.
kq/r
Solution
The electric potential energy U = k(q1*q2)/r = k(+q*-q)/r = -kq²/r.
Correct Answer: C — -kq²/r
Learn More →
Q. What is the electric potential energy of a system of two charges of +2 μC and -2 μC separated by 0.5 m?
-
A.
-72 J
-
B.
72 J
-
C.
0 J
-
D.
-36 J
Solution
U = k * (q1 * q2) / r = (9 × 10^9 N m²/C²) * (2 × 10^-6 C * -2 × 10^-6 C) / 0.5 m = -72 J.
Correct Answer: D — -36 J
Learn More →
Q. What is the electric potential energy of a system of two point charges Q1 and Q2 separated by a distance r?
-
A.
kQ1Q2/r
-
B.
kQ1Q2/2r
-
C.
kQ1Q2/r²
-
D.
kQ1Q2
Solution
The electric potential energy U of a system of two point charges is given by U = kQ1Q2/r.
Correct Answer: A — kQ1Q2/r
Learn More →
Q. What is the electron configuration of a chlorine atom (atomic number 17)? (2020)
-
A.
1s² 2s² 2p⁶ 3s² 3p⁵
-
B.
1s² 2s² 2p⁶ 3s² 3p⁶
-
C.
1s² 2s² 2p⁶ 3s² 3p⁴
-
D.
1s² 2s² 2p⁶ 3s² 3d⁵
Solution
The electron configuration of chlorine is 1s² 2s² 2p⁶ 3s² 3p⁵, filling up to the 3p subshell.
Correct Answer: A — 1s² 2s² 2p⁶ 3s² 3p⁵
Learn More →
Q. What is the electron configuration of an oxygen atom? (2021)
-
A.
1s² 2s² 2p⁴
-
B.
1s² 2s² 2p²
-
C.
1s² 2s² 2p⁶
-
D.
1s² 2s² 2p³
Solution
Oxygen has 8 electrons, and its electron configuration is 1s² 2s² 2p⁴.
Correct Answer: A — 1s² 2s² 2p⁴
Learn More →
Q. What is the electron configuration of Chromium (Cr)?
-
A.
[Ar] 4s2 3d4
-
B.
[Ar] 4s1 3d5
-
C.
[Ar] 4s2 3d5
-
D.
[Ar] 4s2 3d3
Solution
Chromium has an electron configuration of [Ar] 4s1 3d5 due to stability from half-filled d-orbitals.
Correct Answer: B — [Ar] 4s1 3d5
Learn More →
Q. What is the electron configuration of Chromium?
-
A.
[Ar] 3d4 4s2
-
B.
[Ar] 3d5 4s1
-
C.
[Ar] 3d6 4s2
-
D.
[Ar] 3d3 4s2
Solution
Chromium (Cr) has the electron configuration [Ar] 3d5 4s1 due to stability of half-filled d-orbitals.
Correct Answer: B — [Ar] 3d5 4s1
Learn More →
Q. What is the electron configuration of Magnesium?
-
A.
1s² 2s² 2p⁶ 3s²
-
B.
1s² 2s² 2p⁶ 3s² 3p¹
-
C.
1s² 2s² 2p⁶ 3s² 3p²
-
D.
1s² 2s² 2p⁶ 3s² 3d¹
Solution
The electron configuration of Magnesium (Mg) is 1s² 2s² 2p⁶ 3s².
Correct Answer: A — 1s² 2s² 2p⁶ 3s²
Learn More →
Q. What is the electron configuration of oxygen (O)?
-
A.
1s2 2s2 2p4
-
B.
1s2 2s2 2p6
-
C.
1s2 2s1 2p5
-
D.
1s2 2s2 2p3
Solution
The electron configuration of oxygen (atomic number 8) is 1s2 2s2 2p4.
Correct Answer: A — 1s2 2s2 2p4
Learn More →
Q. What is the electron configuration of potassium (K)?
-
A.
1s² 2s² 2p⁶ 3s¹
-
B.
1s² 2s² 2p⁶ 3s²
-
C.
1s² 2s² 2p⁶ 3s² 3p¹
-
D.
1s² 2s² 2p⁶ 3s² 3p²
Solution
The electron configuration of potassium (K) is 1s² 2s² 2p⁶ 3s¹.
Correct Answer: A — 1s² 2s² 2p⁶ 3s¹
Learn More →
Q. What is the electron configuration of the alkali metal potassium (K)?
-
A.
1s² 2s² 2p⁶ 3s¹
-
B.
1s² 2s² 2p⁶ 3s²
-
C.
1s² 2s² 2p⁶ 3s² 3p¹
-
D.
1s² 2s² 2p⁶ 3s² 3p²
Solution
The electron configuration of potassium (K) is 1s² 2s² 2p⁶ 3s¹.
Correct Answer: A — 1s² 2s² 2p⁶ 3s¹
Learn More →
Q. What is the electron configuration of the alkaline earth metal magnesium?
-
A.
1s² 2s² 2p⁶ 3s²
-
B.
1s² 2s² 2p⁶ 3s² 3p²
-
C.
1s² 2s² 2p⁶ 3s² 3p⁶
-
D.
1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
Solution
The electron configuration of magnesium (Mg) is 1s² 2s² 2p⁶ 3s².
Correct Answer: A — 1s² 2s² 2p⁶ 3s²
Learn More →
Q. What is the electron configuration of the element with atomic number 12?
-
A.
1s2 2s2 2p6 3s2
-
B.
1s2 2s2 2p6 3s2 3p1
-
C.
1s2 2s2 2p6 3s2 3p6
-
D.
1s2 2s2 2p6 3s2 3d10
Solution
The element with atomic number 12 is Magnesium (Mg) with the configuration 1s2 2s2 2p6 3s2.
Correct Answer: A — 1s2 2s2 2p6 3s2
Learn More →
Q. What is the electron configuration of the element with atomic number 26?
-
A.
1s2 2s2 2p6 3s2 3p6 4s2 3d6
-
B.
1s2 2s2 2p6 3s2 3p6 4s2 3d5
-
C.
1s2 2s2 2p6 3s2 3p6 4s2 3d7
-
D.
1s2 2s2 2p6 3s2 3p6 4s2 3d8
Solution
The electron configuration of iron (Fe), which has an atomic number of 26, is 1s2 2s2 2p6 3s2 3p6 4s2 3d6.
Correct Answer: A — 1s2 2s2 2p6 3s2 3p6 4s2 3d6
Learn More →
Q. What is the electron configuration of the s-block element magnesium?
-
A.
1s² 2s² 2p⁶ 3s²
-
B.
1s² 2s² 2p⁶ 3s² 3p¹
-
C.
1s² 2s² 2p⁶ 3s² 3p²
-
D.
1s² 2s² 2p⁶ 3s² 3d¹
Solution
The electron configuration of magnesium (Mg) is 1s² 2s² 2p⁶ 3s².
Correct Answer: A — 1s² 2s² 2p⁶ 3s²
Learn More →
Q. What is the electron pair geometry of NH3?
-
A.
Tetrahedral
-
B.
Trigonal planar
-
C.
Octahedral
-
D.
Linear
Solution
NH3 has four electron pairs (three bonding pairs and one lone pair), giving it a tetrahedral electron pair geometry.
Correct Answer: A — Tetrahedral
Learn More →
Showing 14911 to 14940 of 24796 (827 Pages)