Class 11 Physics · Chapter 9 · Test 1
Coulomb's and Gauss's Laws
42 MCQs This test covers charge quantization, Coulomb’s law, permittivity and dielectrics, and electric field intensity with numericals. It also covers electric field lines, electric flux and Gauss’s law with its application to a charged sphere.
42 questions · 35 min · 42 marks
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Sample questions
The first 5 of 42. Try each one, then tap to see the answer.
Question 1
The magnitude of the charge on an electron is:
- A9 x 10^9 C
- B1.6 x 10^-9 C
- C1.6 x 10^-19 C
- D6.02 x 10^23 C
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Answer: C
The elementary charge e = 1.6 x 10^-19 C.
Question 2
The SI unit of charge is:
- AAmpere
- BCoulomb
- CVolt
- DFarad
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Answer: B
The coulomb (C) is the SI unit of charge.
Question 3
Any charge q on an object is an integral multiple of e. This is written as:
- Aq = Ne
- Bq = N/e
- Cq = e/N
- Dq = N + e
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Answer: A
Charge is quantized so q = Ne where N is an integer.
Question 4
Electrostatics is the study of the phenomena and properties of charges:
- AIn motion
- BIn a wire
- CIn a magnetic field only
- DAt rest
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Answer: D
Electrostatics deals with charges at rest while moving charges constitute current.
Question 5
Coulomb's law states that the force between two point charges is:
- AProportional to the sum of charges and inversely proportional to distance
- BProportional to the product of the charges and inversely proportional to the square of the distance
- CProportional to the distance between them
- DIndependent of the charges
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Answer: B
F is proportional to q1q2 and inversely proportional to r^2.
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