Science in Class 10 : Practice MCQ Questions & Answers with Explanations

A fuse is a safety device that breaks the circuit if the current exceeds a safe level, preventing damage to circuit components from overcurrent.

The atomic number is the number of protons in the nucleus. It defines the element and determines its position in the periodic table.

The chemical formula for water is $H_2O$, consisting of two hydrogen atoms and one oxygen atom.

Photosynthesis primarily occurs in the leaves, where chlorophyll absorbs sunlight to convert carbon dioxide and water into glucose and oxygen.

The digestive system breaks down food mechanically and chemically into smaller molecules, which are absorbed into the bloodstream for energy, growth, and repair. It involves the mouth, stomach, intestines, and organs like the liver and pancreas.

Coal is a non-renewable resource formed over millions of years from ancient plant matter. Once used up, it cannot be replaced on a human timescale, and its use contributes to environmental degradation.

The SI unit of force is the Newton (N). One Newton is the force required to accelerate a one-kilogram mass by one metre per second squared. It is a vector quantity with both magnitude and direction.