MCQ on Electrostatics Electrical Engineering Questions - Set 11 - ObjectiveBooks

# Practice Test: Question Set - 11

1. A charge which when placed in vacuum from an equal and similar charge repels with a force of 9 × 10 N, is known as
(A) Milli-coulomb
(B) Micro-coulomb
(C) Pico-coulomb
(D) Coulomb

2. A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is
(A) 62 × 105 V/m
(B) 72 × 105 V/m
(C) 82 × 105 V/m
(D) 92 × 105 V/m

3. What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF?
(A) 50 pF
(B) 100 pF
(C) 150 pF
(D) 200 pF

4. The dielectric constant (relative permittivity) of glass is given by
(A) 0.1 to 0.4
(B) 0.5 to 1.0
(C) 2.0 to 4.0
(D) 5 to 100

5. The bridge used for the measurement of the value of the capacitance is
(A) Wien's Bridge
(B) Wheatstone Bridge
(C) Schering Bridge
(D) Hay's Bridge

6. If the sheet of Bakelite is inserted between the plates of an air capacitor, the capacitance will
(A) Decrease
(B) Increase
(C) Remains unchanged
(D) Become zero

7. In the case of a lossy capacitor, its series equivalent resistance value will be
(A) Small
(B) Very small
(C) Large
(D) Zero

8. Electric field intensity is a quantity
(A) Scalar
(B) Vector
(C) Both (A) and (B)
(D) None of the above

9. When the dielectric is homogeneous, the potential gradient is
(A) Uniform
(B) Nonuniform
(C) Zero
(D) Any of the above

10. Which medium has the least dielectric strength?
(A) Paraffin wax
(B) Quartz
(C) Glass
(D) Air

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