Explanation

Substitute values:

1/R = 1/3 + 1/6

1/R = (2 + 1) / 6 = 3/6 = 1/2

So, R = 2 Ω

Last verified on 22-05-2026

Explanation

• Ohm's law, description of the relationship between current, voltage, and resistance.
• Georg Simon Ohm stated that the electric current through a conductor is directly proportional to the voltage across it, provided temperature remains constant. 
• This relationship is called Ohm’s Law.

Last verified on 22-05-2026

Explanation

• Coulomb's Law states that the magnitude of the electrostatic force (F) between two point charges (q1 and q2) is directly proportional to the product of the charges and inversely proportional to the square of the distance (r) between them.
• Mathematically, this is expressed as: F ∝ (q1 × q2) / r².
• This law describes the relationship between electric charges and the force they exert on each other.

Last verified on 22-05-2026

Explanation

• In an isobaric process, pressure remains constant throughout the process.
• When heat is supplied to an ideal gas, its temperature rises.
• According to gas laws, increase in temperature at constant pressure increases volume.
• This relationship is explained by Charles’s Law.

Last verified on 22-05-2026

Explanation

• A trophic cascade is an ecological process where changes at the top of the food chain affect multiple lower levels.
• In this case, the wolf (top predator) reduces herbivore population.
• With fewer herbivores, plants and vegetation recover and grow.
• It shows how predators control ecosystem balance.
• It is an example of top-down regulation in ecology.

Last verified on 21-05-2026

Explanation

• Pebrine is a dangerous disease of silkworms.
• It is caused by a microscopic protozoan parasite named Nosema bombycis.
• It affects growth, reproduction, and silk production.
• The infection can spread from infected moths to eggs.
• It is one of the major diseases in sericulture.

Last verified on 21-05-2026

Explanation

• Carl Linnaeus is known as the Father of Biological Classification (Taxonomy).
• He introduced the binomial nomenclature system (two-name system).
• This system gives every organism a Genus and Species name.
• It made classification of living organisms systematic and universal.
• His work is the foundation of modern taxonomy.

Last verified on 21-05-2026

Explanation

• Gestation period means the time an animal carries a baby in the womb.
• Elephants have the longest gestation period among land mammals.
• It lasts approximately 18 to 22 months (about 1.5 to 2 years).
• This long period allows proper development of the calf.
• Usually, elephants give birth to a single calf.

Last verified on 21-05-2026

Explanation

• Salivary amylase works best in a neutral pH environment.
• The mouth provides a slightly neutral condition (~6.8–7.0).
• At this pH, starch digestion begins efficiently in the oral cavity.

Last verified on 21-05-2026

Explanation

• Pebrine is a serious disease of silkworms.
• It is caused by a microscopic parasite called a protozoan.
• This disease spreads quickly and affects silk production badly.
• Infected silkworms show weak growth and dark spots on the body.
• It can be transmitted from infected eggs to new generations.

Last verified on 21-05-2026