A loop is moulded by a constant length current carrying wire and placed in external magnetic field, then torque acts on it does not depends upon
$(a)$ Shape of loop
$(b)$ Area of loop.
$(c)$ Current in loop
$(d)$ External magnetic field.
AOnly $a$
B$a, b$
C$b, c$
D
None
Medium
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D
None
d
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