The work done by a conservative force acting on a particle moving around any closed path is: MCQ with Answer and Explanation

The work done by a conservative force acting on a particle moving around any closed path is:
A. Positive
B. Zero
C. Negative
D. Depends on the path taken
Answer: Option B
Solution (By JKSSB Mock Tests)
By definition, a force is conservative if the work done by it on an object moving between two points is completely independent of the path taken. A direct consequence of this is that the total work done by a conservative force (like gravity or electrostatic force) in moving an object around a closed loop (returning to the starting point) is exactly zero.

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Practice More Physics Questions

Question #1
The amount of heat required to convert 1 g of ice at 0°C to water at 0°C is called
A. Latent heat of vaporisation
B. Heat capacity
C. Latent heat of fusion
D. Specific heat

Correct Answer: Option C


Explanation:
Latent heat of fusion of ice = 80 cal/g = 336 J/g.

This question belongs to: Science Physics
Question #2
The heating effect of electric current is utilised in
A. Electric fuse
B. Electric generator
C. Electric motor
D. Galvanometer

Correct Answer: Option A


Explanation:
Fuse uses heating effect (Joule heating I²R). When current exceeds limit, fuse wire melts due to heat, breaking circuit. Motor uses magnetic effect, generator uses electromagnetic induction, galvanometer detects current. Iron box, heater also use heating effect.

This question belongs to: Science Physics
Question #3
The unit of resistance is
A. Watt
B. Ampere
C. Ohm
D. Volt

Correct Answer: Option C


Explanation:
Ohm (Ω) = V/A.

This question belongs to: Science Physics