Q1:- A coil with a certain number of turns has a specified time constant. if the number of turns is doubled , its time constant would
- remain unaffected
- become double
- become four - fold
- get halved
Q2:- Hysteresis is the phenomenon in the magnetic circuit by which
- H lags behind B
- B lags behind H
- B and H are always same
- setting up a constant flux is done
Q3:- The north pole of a magnet is moved away from a metallic ring. the induced current in the ring flows
- clockwise
- anticlockwise
- first anticlockwise and then clockwise
- first clockwise and then anticlockwise
Q4:- The B-H curve for will be a straight line passing through the origin
- air
- soft iron
- hardened steel
- silicon steel
Q5:- Magnetic lines of force coming from a magnet
- intersect at infinity
- intersect within the magnet
- cannot intersect at all
- cancel at pole faces
No comments:
Post a Comment