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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