1. Draw the circuit diagram for a series combination of two bulbs namely A and B connected to a battery of two cells, a resistor,two switches and 1 fan connected parallel to two bulbs A and B.
2. How will you ensure your continuous supply of current? Explain it.
3. Why steel cannot be used as core of an electromagnet instead of soft iron?
4. What do you mean by an electrical circuit? Name its essential components and explain their functions. Illustrate it with the help of suitable diagram.
5. Which terminal is represented by the metal cap of a dry cell? Draw its well labelled diagram and explain it.
6. Who and when discovered the magnetic effect of current? Explain the working principle of an electric bell with the help of a suitable diagram.
7. Why do metals conduct charges better than plastic?
8. State four advantages of electromagnets over permanent magnets.
9. Distinguish between following:
A. Open and closed circuit.
B. DC current and AC current
C. Conductor and insulator
D. Permanent magnet and an electromagnet
10. What is a sure test for magnetism? How is the direction of electric current related to the direction of flow of electrons? Why do we get current only for a short, while we connect a negatively charged ebonite rod to A positively charged glass rod?
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