Physics
Tensional forces normally cause which one of the following?

Thrust faults
Strike-slip faults
Reverse faults
Normal faults

ANSWER DOWNLOAD EXAMIANS APP

Physics
Lightning is produced when

Water vapour produces electricity in the clouds
Strong opposite charges in different clouds break down the resistance offered by the intervening air
Similar charges of electricity rush towards each other and then get repelled
Clouds strike against impurities in air and the friction burns up these impurities

ANSWER DOWNLOAD EXAMIANS APP

Physics
In a railway track, two rails are joined end to end with a gap in between them because

Accidents due to contraction in winter can be avoided
Steel can be saved
Accidents due to expansion in summer can be avoided
Air-gaps are necessary for bearing the weight of running train

ANSWER DOWNLOAD EXAMIANS APP