EASY
10th CBSE
IMPORTANT
Earn 100
If the key in the arrangement (figure) is taken out (the circuit is made open), the magnetic field lines drawn over the horizontal plane ABCD are:
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Important Questions on Magnetic Effects of Electric Current
EASY
10th CBSE
IMPORTANT
A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of coil) is anti-clockwise and clockwise respectively. The magnetic field lines point from B to A. The north pole of resultant magnet is on the face close to:
EASY
10th CBSE
IMPORTANT
For a current in a long straight solenoid N and S-pole are created at the two ends. Among the following statements, the incorrect statement is:
HARD
10th CBSE
IMPORTANT
A uniform magnetic field exists in the plane pointing from left to right as shown in the figure. In the field, an electron and a proton move as shown. The electron and the proton experience:
EASY
10th CBSE
IMPORTANT
Commercial electric motor do not use:
MEDIUM
10th CBSE
IMPORTANT
In the arrangement shown in the figure, there are two coils on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then:
EASY
10th CBSE
IMPORTANT
Choose the incorrect statement:
MEDIUM
10th CBSE
IMPORTANT
A constant current flows through a horizontal wire in the plane of the paper from East to West as shown in the figure. The direction of magnetic field will be north to south at a point :
EASY
10th CBSE
IMPORTANT
The strength of the magnetic field inside a long current-carrying straight solenoid is:
