Expert please answer both the questions fast
Dear Student,
2.
In India the electricity is supplied at 220 V and its frequency is 50 Hz (option a).
3.
u = - 40 cm
f = - 60 cm
we know that,
1/f = 1/v - 1/u
1/v = 1/f + 1/u
1/v = -1/60 - 1/40
1/v = - 2 - 3/120
1/v = - 5/120
v = - 24 cm (option d)
Regards
2.
In India the electricity is supplied at 220 V and its frequency is 50 Hz (option a).
3.
u = - 40 cm
f = - 60 cm
we know that,
1/f = 1/v - 1/u
1/v = 1/f + 1/u
1/v = -1/60 - 1/40
1/v = - 2 - 3/120
1/v = - 5/120
v = - 24 cm (option d)
Regards