E-Activity 12

Q-1:
(a) What do we call several cells connected together?
(b) Explain why it is important that the cells are connected the right way around.
(c) What is given to the electricity as it flows through the cells?
Q-2:
(a) Draw a circuit diagram for a series circuit containing a cell, a switch and four bulbs.
(b) Draw a circuit diagram for a parallel circuit containing a cell and four bulbs.
(c) Explain why no electricity flows in the above circuit when the switch S is open.
When switch S is closed a current of 0.2 A flows through ammeter A.
(d) What current flows through ammeter B?
(e) What current flows through ammeter C?
Q-3:
Katy built the circuit as shown above.
(a) Why did the bulb not glow?
(b) Katy placed each of the objects shown above in turn, across the gap AB.
(c) Which two objects made the bulb glow? Tick the appropriate boxes.
(d) Why did the bulb glow when either of these two objects was placed across the gap AB?
Q-4:
In the circuits shown here all the cells and all the bulbs are identical
(a) in which circuit will the bulb(s) glow the brightest?
(b) In which circuit will the bulb(s) glow least?
(c) In which two circuits will the bulbs have the same brightness?
(d) What energy changes are taking place when electricity flows through each of the bulbs?
Q-5:
The diagram below shows two similar circuits.
Explain why bulb A glows but bulb B does not glow.