Class 10 - Science -
SA1 - Question Paper (2013)
|Q1:||Write the relation between electric power (W) of a device with potential difference (volt) across it and current (amp) flowing through it.||1|
|Q2:||Name two parts which constitute the central nervous system.||1|
|Q3:|| Write the characteristic features of the micro organisms which help in the production of biogas in a biogas plant.||1|
|Q4:||Two solution A and B have pH 3 and 5 respectively. Which of the two solutions has more hydrogen ion concentration and which one is more acidic? Give reason for your answer.||2|
|Q5:|| Give reason for the following:|
(a) Sodium metal is kept immersed in kerosene.
(b) Blue colour of copper sulphate solution disappears when some aluminium powder is added in it.
|Q6:||Give two reasons why different electrical appliances in a domestic circuit are connected in parallel.||2|
|Q7:|| (i) Give reason ,”Magnetic field is strongest near the pole.”|
(ii) Describe an activity to show that magnetic field is strongest near poles of a bar magnet.