Question 1: Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position, and battery.
Question 2: Draw the circuit diagram to represent the circuit shown in figure. (See textbook for question figure)
Question 3: The given figure (in textbook) shows four cells fixed on a board. Draw lines to indicate how you will connect their terminals with wires to make a battery of four cells.
Question 4: The bulb in the circuit shown in given figure (textbook) does not glow. Can you identify the problem? Make necessary changes in the circuit to make the bulb glow.
Answer: The positive terminals of both the cells are together and that is why the bulb is not glowing. The cells should be kept in a way that the positive terminal of one cell is near the negative terminal of another cell; to make the bulb glow.
Question 5: Name any two effects of electric current.
Answer: The two effects of electric current are; heating effect and magnetic effect.
Question 6: When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.
Answer: This happens because when electric current passes through a conducting wire, a magnetic field is created around the wire. The magnetic field causes deflection in the magnetic compass.
Question 7: Will the compass needle show deflection when the switch in the circuit shown by Fig.14.24 is closed?
Copyright © excellup 2014