1 )
In an LR circuit , time constant is that time , in which current grows from
zero to the value ( where I˳ is the steady state current ) ?
Solution
: -
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2 )
At what distance should a book be placed from a 50 cd ( Candela ) bulb , so
that the illuminance on the book becomes
2 (Lm/m2) .
Solution
: -
Illuminance (E) is measured in Lux . The lux is SI unit
used when characterizing illumination condition of a surface .
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3 )
A particle executes SHM of amplitude A ,
a )
At what distance from the execute position is its kinetic energy equal to half
its potential energy ?
b )
At what position from the execute position is its speed half the maximum speed
?
Solution : -
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4 )
A bar magnetic of magnetic moment is aligned parallel to the direction of a
uniform magnetic field B . Calculate work done to align the magnetic moment : -
a )
opposite to the field ,
b )
normal to the field ,
Solution : -
