41. Which of the following devices is based on the phenomenon of electromagnetic induction?
42. . . . . . . . . states that the total current entering a junction is equal to the total current leaving the junction.
43. The torque on a rectangular coil placed in uniform magnetic field is large when the
44. An electric washing machine of 750 W is used for 4 hours per day. Energy consumed by the machine in one day is . . . . . . . .
45. In an electric circuit, flow of electric current is due to . . . . . . . .
46. At low temperature, lead behaves as a
47. What is the resistance (in Ω) of an electrical component if a current of 0.2A passes through it on application of 8 V of potential difference across it?
48. Factors affecting resistance of matter:
1. Temperature
2. Nature of substance
3. Conductor length
4. Area of transverse passage
1. Temperature
2. Nature of substance
3. Conductor length
4. Area of transverse passage
49. Electricity is produced through dry cell from
50. According to the Joule's law of heat, the heat generated in a circuit depends on some factors. Which of the following can be charged in this?
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