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Q.

For central force field :
(1) Torque is zero about the central force field.
(2) Angular momentum is conserved about any point in central force field.
(3) Force is position dependent.
(4) Force is conservative.

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a

only (1) and (2)

b

only (1), (2) and (4)

c

(1), (2), (3) and (4)

d

only (1), (3) and (4)

answer is D.

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Detailed Solution

For central force field F=f(r)r^
Torque τ=r×F=r×f(r)r^=0
Angular momentum τ=dLdt=0L=constant
Every central force is position dependent and conservative in nature.

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