Exercise- 10 th Science 1, 4. Effects of electric current
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1. The frequency of AC is ..... Hz.
2. Write Fleming’s left hand rule.
3. The right hand thumb rule is called ....... ... .... rule.
4. 220/ 1.5 =?
5. How do we decide that a given material is a good conductor of electricity or is an insulator?
6. If 1 kW power is used for 1 hour, it will mean .... of electrical energy is used.
7. The unit of electrical power is ..... .
8. (220)2 / 12 =?
9. In Hans Christian Oersted honour, the unit of intensity of the magnetic field is termed as ...... .
10. A device changing electrical energy into mechanical energy is known as electric ...... .
11. A tungsten wire is used in an electric bulb.
12. ...... showed that an electric current can be produced in a conductor with the help of a moving magnet.
13. A current changing in magnitude and direction after equal intervals of time which is called ........ ..... .
14. The magnetic field in a solenoid ...... .
15. 220/ 5 =?
16. ...... current flows in one direction,
17. Write long form of MCB.
18. Write Fleming’s right hand rule.
19. A non oscillatory current flowing in one direction, in a circuit, from the cell to the cell. Such a current is called a ...... ..... .
20. Galvanometer, Voltmeter and Ammeter is a sensitive device which works on the same principle as that of an electric ....... .
21. The intensity of the magnetic field within the ..... is uniform everywhere.
22. Write Day-to day uses of electric motor.
23. 220 × 0.45 =?
24. Write use of the heating effect of electric current.
25. Draw figure of a solenoid coil.
26. √(400×9) =?
27. 1kWh =...... J.
28. Define solenoid.
29. The oscillation of the alternating current occurs in a sinusoidal manner with time and hence is shown by the symbol ....... .
30. Melting point of tungsten is nearly ..... °C.
31. Write Right hand thumb Rule.
32. The ....... current can increase, can be stable, or can reduce also, but it is not oscillatory.
33. When 1 kWh electrical energy is used, it is termed as .... unit of energy.
35. The ‘live’ and the ‘neutral’ wires have potential difference of ..... V.
36. P = ..... / R.
37. ..... discovered the laws of electromagnetic induction.
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