Page 1 : connecting wire, switch in the 'OFF' position,, Draw in your notebook the symbols to represent, artbook Questions, [ 153, Draollowing components of electrical circuits, Coh. cell, switch in the 'ON' position and battery., Switch in the, "OFF' Position, ke, connecting wire, ols, Bulb, Q. 5. Name any two effects of electric current., Ans. (i) Heating effect, (i) Magnetic effect., Q. 6. When the current is switched on through a wire,, a compass needle kept nearby gets deflected from, its north-south position. Explain., Ans. When electric current passes through a wire, it acts, like a magnet. This is the magnetic effect of the, electric current caused by the attraction of the wire., So, the compass needle which is a magnet, gets, deflected., T, Switch in the, "ON' Position, Cel, Battery, a Draw the circuit diagram to represent the circuit, shown in Fig., Q. 7. Will the compass needle show deflection when, the switch in the circuit shown by Fig. is closed 7, Ans. No. As there is no cell, so no current can flow., Q. 8. Fill in the blanks :, (a) Longer line in the symbol for a cell represents, its.., (b) The combination of two or more cells is called, id the, w ?, terminal., Q.3. Fig. 14.22 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., Ans., or the, a.., (c) When current is switched 'on' in a room heater,, it. ., (d) The safety device based on the heating effect of, electric current is called a.., Ans. (a) positive, (b) battery, (c) gets heated, (d) fuse., 0. 9. Mark "T' if the statement is true and F if it is false:, (a) To make a battery of two cells, the negative, terminal of one cell is connected to the negative, terminal of the other cell., (b) When the electric current through the fuse exceeds, a certain limit, the fuse wire melts and breaks., ere the, ? Make, Electric, (T/F), ip of the, (TF), bute necessary changes in the circuit to make the, bulb., (c) An electromagnet does not attract a piece of iron., (T/E), (T/F), does not glow. Can you identity the problem ?, The problem with the circuit is that both the, negative terminals are connected to the bulb., Corrected diagram, e nail ?, (d) An electric bell has an electromagnet., Ans. (a) F, (b) T, (c) F, (d) T., Q. 10. Do you think an electromagnet can be used for, separating plastic bags from a garbage heap ?, Explain.