Question

1. What do you mean by a conduction tester? Explain its working
with the help of a diagram. (2)
2. Define the terms -electric circuit and electric switch. (1)
3. Distinguish between sieving and filtration with the help of
examples. (2)
4. How can you separate the following mixtures into its components
(i)Mixture of chalk powder, salt and water.
(ii)Mixture of sand, shells and water. (1)​

Answer 1

Answer:

1.A conduction tester basically means a device which is used to identify whether an object is a good conductor or bad conductor of electricity

2.

• Electric circuit-Current always flows in a closed loop.This closed loop is called electric circuit.A standard methid of drawing an electric circuit is called electric circuit diagram

• Electric switch-It is a device which gives the control to open or close the circuit for a long time

3 and 4 i am unsure

Explanation: