60 N
30 N
40 N
15 N
Answer is Right!
Answer is Wrong!
Electrostatics
62. Which of the following materials has the highest value of dielectric constant?
Glass
Vacuum
Ceramics
Oil
Answer is Right!
Answer is Wrong!
Detailed SolutionWhich of the following materials has the highest value of dielectric constant?
63. Dielectric strength ______ with increasing thickness
increases
decreases
remains unaltered
none of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionDielectric strength ______ with increasing thickness
64. The capacitance between two plates increases with
shorter plate area and higher applied voltage
shorter plate area and shorter distance between them
larger plate area, longer distance between plates and higher,applied voltage
larger plate area and shorter distance between plates
Answer is Right!
Answer is Wrong!
Detailed SolutionThe capacitance between two plates increases with
65. A condenser suitable for D.C. only is
Metallic plate variable gang condenser
Metallic paper capacitor
only is A. Metallic plate variable gang condenser B. Metallic paper capacitor C. Oil impregnated paper condenser
Poled aluminium electrolytic condenser
Answer is Right!
Answer is Wrong!
66. The unit of dielectric strength is given by
V/m
V2/m
m/V
m/V2
Answer is Right!
Answer is Wrong!
Detailed SolutionThe unit of dielectric strength is given by
67. A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
Paper capacitor
Ceramic capacitor
Electrolytic capacitor
Any-of the above
Answer is Right!
Answer is Wrong!
68. For closer tolerances which of the following capacitors is usually preferred ?
Paper capacitor
Mica capacitor
Ceramic disc capacitor
None of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionFor closer tolerances which of the following capacitors is usually preferred ?
69. The presence of an uncharged conductor near a charged one increases the
charge of the charged conductor
capacity of the charged conductor
potential of the charged conductor
all of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionThe presence of an uncharged conductor near a charged one increases the
70. When a dielectric is placed in an electric field the field strength
decreases
increases
reduces to zero
remain unchanged
Answer is Right!
Answer is Wrong!
Detailed SolutionWhen a dielectric is placed in an electric field the field strength