Magnetic Effects of Electric Current (Worksheet)
CBSE Class 10 - Physics
Fill in the blanks
1. The space around a magnet in which the force of attraction and repulsion due to the magnet can be detected is called the _____________.
2. Outside a bar magnet, the magnetic field lines tend to start from _______ pole and reach ________ pole. Thus these field lines form _______ loops.
3. The region where the field lines are close together will have _______ magnetic field.
4. Is magnetic field a vector quantity? (Yes/No)
5. Fields lines never _______ each other.
6. The magnetic field lines around a straight conductor carrying current are ____________.
7. The direction of magnetic field in a straight conductor carrying current is given by ________________.
8. In a straight conductor carrying current, the magnetic field is _________ proportional to electric current and _________ proportional to the distance from the conductor.
9. The magnetic field inside a solenoid is similar to that of a ___________ .
10. A coil like construction in a cylindrical form wound closely and separately from a conducting wire is called _________.
11. Fleming’s left-hand rule gives the direction of _________ acting on a conductor.
12. An electric motor is a device that converts electric energy into ________________.
13. Due relative motion between loop and magnet, an EMF is generated in the loop. Name the phenomenon? _____________
14. The direction of induced current in a secondary coil is determined by _________________.
15. Electric motor works on the principle of _________________.
16. The current which changes its direction from positive to negative and vice versa is called _____________.
17. _________ is the instrument which detects the presence of electric current.
18. In our houses we receive AC electric power of _____ V with a frequency of ______ Hz.
19. One of the wires in the electricity wiring of houses is with red insulation, called ______ wire.
20. ________ is a safety device used to protect circuits from short circuiting or overloading.
Answers:
1: magnetic field
2: north (N), south (S), closed
3: strong
4: Yes
5: cross
6: concentric circles
7: Right Hand Thumb Rule
8: directly, inversely
9: bar magnet
10: solenoid
11: magnetic force
12: mechanical energy
13: Electromagnetic induction (EMI)
14: Flemmings Right Hand Rule.
15: Electromagnetic induction (EMI)
16: alternating current
17: Galvanometer
18: 220, 50
19: live
20: Fuse/MCB
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