MCQ
Biotic factors are :
- AChemical factors of soil which affect life
- BPhysical factors of soil which affect life
- ✓All living organisms which influence other organisms
- DLiving organisms which get eaten by other organisms
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Assertion (A): The magnitude of the magnetic field at a point on the axis of a current-carrying solenoid is inversely proportional to the current flowing through the solenoid.
Reason (R): The magnitude of the magnetic field at a point on the axis of a current-carrying solenoid is directly proportional to the number of turns per unit length of a solenoid.
