99. When the dielectric is homogeneous, the potential gradient is
A. uniform
B. 200 to 1600 volts
C. 2000 to 3000 volts
D. more than 10000 volts

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100. The potential gradient across the material of low permittivity is than across the material of high permittivity.
A. smaller
B. greater
C. both and
D. none of the above

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101. A capacitor having capacitance of 5 tif is charged to a potential difference of 10,000 V. The energy stored in the capacitor is
A. 50 joules
B. 150 joules
C. 200 joules
D. 250 joules

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102. 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 x 105 V/m
B. 72 x 105 V/m
C. 82 x 105 V/m
D. 92 x 105 V/m

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103. Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleratial difference of 100 V. The acceleration of an electron placed between them is
A. 0.56 x 1015 m/s2
B. 1.5 x 1015 m/s2
C. 1.6 x 1015 m/s2
D. 1.76 x 1015 m/s2

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104. The total deficiency or excess of electrons in a body is known as
A. current
B. voltage
C. potential gradient
D. charge

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105. If the relative permitivity of mica is 5,its absolute permittivity is
A. 44.27 x 10-12 F/m
B. 44.27x 10-11 F/m
C. 4427 x l0
D. 4427 x 10-9 F/m

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