Electricity and Magnetism AFCAT Questions

AFCAT Physics

Electricity and Magnetism MCQ Questions


1.
The force between two point charges is governed by which law?
A.
Ampere's Law
B.
Gauss's Law
C.
Faraday's Law
D.
Coulomb's Law
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ANSWER :
D. Coulomb's Law
2.
The value of Coulomb's constant k in SI units is approximately:
A.
8.85 × 10⁻¹² N·m²/C²
B.
6.67 × 10⁻¹¹ N·m²/C²
C.
9 × 10⁹ N·m²/C²
D.
9 × 10⁻⁹ N·m²/C²
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ANSWER :
C. 9 × 10⁹ N·m²/C²
3.
If the distance between two point charges is doubled, the electrostatic force between them becomes:
A.
One-half
B.
Four times
C.
Double
D.
One-fourth
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ANSWER :
D. One-fourth
4.
If both charges are doubled and distance is halved, the new force becomes how many times the original?
A.
8 times
B.
4 times
C.
16 times
D.
2 times
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ANSWER :
C. 16 times
5.
The SI unit of electric charge is:
A.
Ampere
B.
Volt
C.
Newton
D.
Coulomb
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ANSWER :
D. Coulomb
6.
The permittivity of free space ε₀ has the value:
A.
9 × 10⁹ C²/N·m²
B.
6.022 × 10²³ C²/N·m²
C.
1.6 × 10⁻¹⁹ C²/N·m²
D.
8.854 × 10⁻¹² C²/N·m²
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ANSWER :
D. 8.854 × 10⁻¹² C²/N·m²