The focal length of a concave lens is always negative, as it diverges light rays.

The focal length of a concave lens is considered negative as it diverges light rays.

The focal length of a concave lens is negative, indicating that it diverges light rays.

In a concentration cell, the electrodes are made of the same metal but have different concentrations of the electrolyte.

In a concentration cell, the two half-cells have the same electrodes but different concentrations of the electrolyte.

The genotype of the F1 generation from a cross between TT and tt will be Tt (all offspring will be heterozygous).

The height of the F1 generation will be tall, as tall is the dominant trait.

The F1 generation will have red flowers since red is dominant over white.

The arrangement of particles in a crystal lattice is primarily determined by intermolecular forces, which dictate how particles pack together.

Decreasing the slit width increases the diffraction angle, causing the central maximum to become wider.

The expected phenotypic ratio in a dihybrid cross is 9:3:3:1.

Increasing the slit separation d decreases the fringe width, causing the fringes to move closer together.

Using polychromatic light results in overlapping patterns of different wavelengths, causing the overall pattern to become broader.

In a fluid at rest, the pressure at a point depends on the depth of the fluid above that point.

In a fluid, pressure increases with depth due to the weight of the fluid above.

Surface tension is the property of a fluid that causes its surface to behave like a stretched elastic membrane.

A rabbit is a primary consumer as it feeds on plants (producers).

The correct order of energy flow in a food chain is Producer → Consumer → Decomposer.

Primary producers are organisms that produce their own food, primarily plants through photosynthesis.

Systematic errors lead to biased results, consistently deviating from the true value.

Systematic errors indicate a consistent bias in measurements.

Systematic errors can be corrected by subtracting the known error from the measured value.

An uncertainty of ±0.1 g indicates that the measurement can vary by 0.1 g from the reported value.

The range is calculated as (10.0 - 0.5) cm to (10.0 + 0.5) cm, which is 9.5 cm to 10.5 cm.

The number 3.00 kg has three significant figures.

Moving one mirror changes the path length, causing the fringe pattern to shift to the right.

The radius of the dark rings in Newton's rings is proportional to the square root of the ring number. Thus, the second dark ring will have a radius of 2r.

The radius of the dark rings in Newton's rings is given by r_n² = nλR, where R is the radius of curvature of the lens. Thus, r_n ∝ nλ.

When a p-n junction is forward biased, the depletion region narrows, allowing current to flow.

In the p-type region of a p-n junction, holes are the majority charge carriers.