Q39. Draw the circuit diagram to represent the circuit shown below.
Q40. The bulb in the circuit shown in Fig. does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.
Q41. Zubeda made an electric circuit using a cell holder shown in Fig., a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.
Q42. Write an experiment to show the magnetic effect of current.
Q43. Write an experiment to make an electromagnet.
Q44. How does an electric bell work?
Explain the working of an electric bell.