Explanation

Electric current is defined as the rate of flow of charge through a conductor.

Its formula is 𝐼 = 𝑄/𝑡, where 𝐼 is current, 𝑄 is charge, and 𝑡 is time.

Explanation

The area under a force–displacement graph gives the work done by the force.

This is because Work = Force × Displacement, graphically represented by the area.

Explanation

The power (P) is given by:

P = VI

Given P = 100 W and V = 200 V, we can find the current (I):

100 = 200 × I

I = 100 / 200

= 0.5 A

Explanation

When moving with constant velocity, there is no net acceleration acting on the body.

Therefore, the apparent weight remains the same as actual weight — not changed.

Explanation

Kinetic Energy (K.E) = ½ × mass × velocity² = ½ × 2 × (4)² = 1 × 16 = 16J

The formula directly gives 16 joules for the given mass and velocity.

Explanation

Biomass energy comes from plants, which get their energy through photosynthesis using sunlight.

So, the Sun is the original source of energy for all biomass.

Explanation

In electrical-mechanical analogies, mass (which resists acceleration) corresponds to inductance, which resists changes in current.

Just as mass stores mechanical energy, inductance stores magnetic energy.

Explanation

Protozoa are often studied under parasitology because many are parasites causing diseases like malaria and amoebiasis.

Though protozoa are microorganisms, their parasitic nature makes them a key focus in parasitology.

Explanation

In the resistor color code, orange represents the digit 3.

This value is used in the first two bands (significant figures) or as the multiplier depending on the band position.

Explanation

The total resistance (R) in the series circuit is:

R = 5 + 10 + 10

= 25 Ω

The current (I) is given by Ohm's law:

I = V/R

= 50V / 25Ω

= 2A