SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Question Bank Solutions for Science and Technology 1

What is used to turn off the sudden increase in current in the electrical circuit of the house nowadays?

Write two devices based on the heating effect of electric current.

What is meant by regelation?

Write the name.

Conversion of ice into liquid due to applied pressure and the reconverts to ice once the pressure is removed.

The modern periodic table has 1 to 7 periods.

The modern periodic table shows the molecular masses of the elements in each frame.

p-block is composed of groups 1 and 2.

To the left of the zig-zag line in the periodic table are the metal elements.

The K and L shells of the elements Na and Mg contain electrons.

Live wire and neutral wires have a 220 V potential difference.

Increasing the current passing through the wire decreases the magnetic field intensity.

Write an Explanation.

Period

Write scientific reason.

There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.

Write scientific reason.

Lithium and sodium are included in the same group in periodic table.

Nowadays MCBs are used in homes, for stop the current in the circuit which suddenly increases.

Write scientific reason.

A coil made up of alloy Nichrome is used in the electric heater cooker as a resistor.

Write scientific reason.

It is beneficial to carry electrical energy in AC form as it is carried over long distances.

Write scientific reason.

Even the wire moves through the ice slab , the ice slab does not break.

Complete the following flow chart.

In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.