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The diagram shows a circuit in which all the switches are open.

Which of the following switch positions would give a resistance of 4 W between X and Y ?

In the given figure, rectangle, square, circle and triangle represents the regions of wheat, gram, maize and rice cultivation respectively.

Which area is cultivated by rice and maize only?

A9
B8
C2
D7

An electric circuit is shown here. When the switch S is opened, which of the following lamp(s) will switch off?


A1 only
B3 only
C2 and 3 only
D1, 2 and 3

Match the column I with column II and select the correct option from the codes given below.

Ms Naina, a science teacher divided the class into four groups and each group was given different mixtures :
Group I : Sand and iron filings
Group II : Oil and water
Group III : Salt and sand
Group IV : Wheat and husk
Which of the following methods should each group use to separate the components of mixtures given to them?

Read the given paragraph.
X, Y and Z are three methods of waste management. X requires action of biological agents whereas Y and Z are chemical processes. Both X and Y reduce the waste volume whereas Z makes the waste reusable.
Which of the following is incorrect regarding X, Y and Z?

AX enriches the soil with nutrients and helps in recycling of matter between living organisms and their environment.
BY generates gases and heat energy and is best suited for disposing toxic waste.
CZ increases the demand and supply of fresh raw material and causes air and water pollution.
DSaprophytes and detritivores play a major role in X.

Which of the following substances is used in making the head of matchstick?

APotassium chlorate
BRed phosphorus
CPowdered glass
DSulphur

The point at which the parallel rays of light converge is called ________ of the lens.

APrincipal point
BFocal point
CCurvature point
DDiminished point

P and Q start walking from the same point. P goes North and covers 3 km, then turns right and covers 4 km. Q goes West and covers 5 km, then turns right and covers 3 km. How far apart are they from each other?

A9 km
B10 km
C8 km
D5 km

Find the fourth figure from the right end.


A

B

C

D