Page 64 - CT&AI_CLasa_7_Part_1

Electricity:

Circuits and their

3 Components

computational thinking quest

Tick ( ) the correct option.
1. You connect a small buzzer to a battery, (c) Only L glows — S must control L
1
2
1
and it only works when the red wire is on the directly.
(+) side. Then you connect a light bulb, and (d) Neither glows — both switches
it works no matter which way you turn the must be ON for any lamp to glow.
battery. Why is the bulb different? 3. In a simple circuit consisting of a battery, a
(Abstract Thinking)
bulb, and wires, what happens if you add a
(a) The bulb contains simpler internal second battery in the correct orientation?

components compared to the (Abstract Thinking)
buzzer.
Bulb
(b) The bulb does not care about the
direction of current (polarity). Switch

(c) The bulb has a stronger battery.

(d) The bulb is made of plastic.

2. Lamp L is in series with switch S , and lamp L
1
2
2
is in series with switch S . Both branches share Battery
1
the same battery. Analyse all the combinations
and predict which lamp(s) glow. (a) The bulb will glow brighter.
If S is ON and S is OFF, which lamp(s) glow — (b) The bulb will get dimmer.
1 2
and why does the state of S NOT affect L ?
2 2
(Pattern Recognition) (c) The current will stop flowing.

(a) Both L and L glow — any closed (d) The wires will turn into insulators.
1
2
switch powers the whole circuit. 4. A student builds a circuit correctly — battery
is charged, bulb is working, switch is closed.
(b) Only L glows — S closes L 's
2 1 2 However, he forgot to strip the rubber insulation
branch; S is open so L 's branch from the ends of the connecting copper wires
2 1
has no current. before attaching them to the terminals. He
closes the switch but the lamp does not glow.

62 Computational Thinking-7 (Science)