SSC (English Medium) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions for Science and Technology 1

The device used for producing electric current is called _________.

Name the following:

Main ore of aluminium.

When does short circuiting take place?

What happens to the resistance of the circuit during a short circuit?

What happens to the flow of electric current during a short circuit?

What is overloading?

How can the effects of overloading be avoided?

In a Std. X class out of 40 students 10 students use spectacles, 2 students have positive power and 8 students have negative power of lenses in their spectacles.

Answer the following questions:

(1) What does the negative power indicate?

(2) What does the positive power indicate?

(3) Generally which type of spectacles do most of the students use?

(4) What defect of eyesight do most of the students suffer from?

(5) Give two possible reasons for the above defect.

Sodium or potassium salt of higher fatty acid is termed …………

State Fleming’s right-hand rule.

State three differences between direct current and alternating current.

Why should the wires carrying electricity not be touched barefooted?

What is myopia?

Explain two possible reasons of myopia. How can it be corrected? Explain with a suitable diagram.

An object is held 20 cm away from a converging lens of focal length 10 cm. Find the position of the image formed.

Explain the term with examples.

Endothermic reaction  

Give scientific reason.

While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.

Electromagnetic induction means ______.

Identify the endothermic and exothermic reaction.

HCl + NaOH → NaCl + H₂O + heat

Identify the endothermic and exothermic reaction.

\[\ce{2KClO_{3(s)}->[\Delta] 2KCl_{(s)} + 3O2}\]