
HVE unit 1

Quiz
•
Other, Education
•
University
•
Hard

Kamalakannan C
Used 18+ times
FREE Resource
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The electrical field developed within clouds before a lightning stroke occurs can be of the order of
0.1 kV/cm
1 kV/cm
100 kV/cm
10 kV/cm
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The maximum voltage gradient at the ground level due to a charged cloud before lightning strikes, can be as high as
1 V/cm
30 V/cm
30 V/m
300 V/cm
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The velocity of wind currents required for charge separation inside the moving clouds is of the order
1 to 5 m/s
5 to 10 m/s
10 to 20 m/s
50 to 200 m/s
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Velocity of leader strokes in lightning discharges is about
1.5 × 105 cm/s
1.5 × 106 cm/s
1.5 × 107 m/s
1.5 × 108 m/s
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The velocity of return or main stroke may be of the order of (C = velocity of light)
0.01 C
0.001 C
0.1 C
0.8 C
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The peak value of lightning stroke currents are of the order
100 A
1000 A
10 to 100 kA
106 A
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The cumulative probability of a 10 kA lightning stroke current ( peak) is about(A)
(B)
(C)
(D)
0.6
0.2
0.1
0.98
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