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WorksheetsMagnetism and magnetic effect
Total questions: 15
Worksheet time: 22mins
At the Earth's equator vertical component of magnetic field will be ________
maximum
minimum
zero
none of the option
Aurora australis happens due to __________
mass of earth
density of earth
sunlight
solar wind
When a bar magnet is cut into 2 pieces along its length its pole strength will be _________
halved
zero
twice
same
When a bar magnet is cut into 2 pieces perpendicular to its axis its dipole moment will be _________
halved
twice
same
zero
The magnetic force of attraction or repulsion will same if ___________
pole strength increases and distance between the poles decreases
pole strength increases twice and distance between the poles increases twice
pole strength and distance between the poles are equal in magnitude
none of the options
Torque will be maximum for a magnet if ________
its axis is along the direction of external field
its axis is perpendicular to the external field
its north pole points in opposite direction of the field
none of the options
superconductors will behave as __________ materials below transition temperature
none of the options
paramagnetic
ferromagnetic
diamagnetic
In transformers the hysteresis loss will be ______
less
more
maximum
zero
In right hand thumb rule the stretched thumb gives the direction of __________
current
magnetic moment
magnetic field
magnetic force
The force experienced by two parallel current carrying conductors is ___________ if they carry current in __________ direction.
repulsive, same
attractive, same
repulsive, opposite
attractive, opposite
A 2 MeV proton is moving perpendicular to uniform magnetic field of 2.5 T. What is the magnetic force on the proton?
8 x 10-12 N
19 x 10-12 N
118 x 10-12 N
88 x 10-12 N
A wire 12 cm long and carrying a current of 2 A is placed perpendicular to a uniform magnetic field. If a force of 0.8 N acts on it. The value of magnetic induction is _______ T
1.3
2.3
3.3
4.3
The magnetic field at the center of a coil in the form of a square 4 cm carrying a current of 5 A is ___________ T
0.42 x 10-4
1.42 x 10-4
2.42 x 10-4
3.54 x 10-5
A current of 10 A flows through each two parallel long wires. The wires are 5 cm apart. The force per unit length of each wire is _______ Nm-1
4 x 10-4
8 x 10-4
6 x 10-4
2 x 10-4
A solenoid is 2 m long and 3 cm in diameter. It has 5 layers of winding of 1000 turns each and carries a current of 5 A. The magnetic field at its center is ________ T.
4.57 x 10-2
3.57 x 10-2
2.57 x 10-2
1.57 x 10-2
