Lighting and Magnetic Effects of Current NDA Questions

NDA Physics

Lighting and Magnetic Effects of Current MCQ Questions


1.
The most suitable material for making the core of an electromagnet is
A.
Steel
B.
Iron
C.
Soft iron
D.
Aluminium
😑 View Answer Rough Work Error
ANSWER :
C. Soft iron
2.
Which of the following is not attracted by a magnet?
A.
Steel
B.
Cobalt
C.
Brass
D.
Nickel
😑 View Answer Rough Work Error
ANSWER :
C. Brass
3.
The magnetic field lines always begin from
A.
N-pole and end on S-pole
B.
S-pole and end on N-pole
C.
Start from the middle and end at N-pole
D.
Start from the middle and end at S-pole
😑 View Answer Rough Work Error
ANSWER :
A. N-pole and end on S-pole
4.
A soft iron bar is introduced inside a current-carrying solenoid. The magnetic field inside the solenoid
A.
Will become zero
B.
Will increase
C.
Will decrease
D.
Will remain unaffected
😑 View Answer Rough Work Error
ANSWER :
B. Will increase
5.
The direction of force on a current-carrying conductor in a magnetic field is given by
A.
Fleming’s left hand rule
B.
Fleming’s right hand rule
C.
Right-hand thumb rule
D.
Left-hand thumb rule
😑 View Answer Rough Work Error
ANSWER :
A. Fleming’s left hand rule
6.
The direction of induced current is given by
A.
Fleming’s right hand rule
B.
Fleming’s left hand rule
C.
Right-hand thumb rule
D.
Left-hand thumb rule
😑 View Answer Rough Work Error
ANSWER :
A. Fleming’s right hand rule