MODEL PAPER - 7 [2026] — Science STD 10 — Question

Why does it take some time to see objects in a dim room when you enter the room from bright
sunshine outside?

The figure given below shows the magnetic field between two magnets:

1. Copy the diagram and label the other poles of the magnets.
2. Which is the weaker magnet?

Magnetic field lines are shown in the given diagram. A student makes a statement that magnetic field at X is stronger than at Y. Justify this statement. Also redraw the diagram and mark the direction of magnetic field lines.

Explain why, it is more dangerous to touch the live wire of a mains supply rather than neutral wire.

To construct ray diagram we use two light rays which are so chosen that it is easy to know their directions after reflection from the mirror. List these two rays and state the path of these rays after reflection. Use these rays to locate the image of an object placed between centres of curvature and focus of a concave mirror.

With the help of a labelled diagram, explain how a concave lens diverges a beam of parallel light rays.

For the coil in the diagram below, when the switch is pressed:

1. What is the polarity of end A?
2. Which way will the compass point then?

Draw a circuit diagram to show how a soft iron piece can be transformed into an electromagnet.

Why are the ‘danger signal’ lights red in colour?

A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω , 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor?