Explanation

In a line absorption spectrum, dark lines are due to transmittance.

In an absorption spectrum, dark lines appear against a continuous background.

These dark lines correspond to wavelengths of light that have been absorbed by the material through which the light passes.

The remaining wavelengths, which are not absorbed, are transmitted and create the bright background. 

Explanation

The fine ruling (track spacing) on a CD is about 0.5 micrometers (µm).

This microscopic spacing allows the CD to store large amounts of data through optical encoding.

Explanation

In the equation PV = nRT, R is the Universal Gas Constant, used in the ideal gas law.

Its value is 8.31 J/mol·K.

It links pressure, volume, temperature, and amount of gas.

Explanation

When θ = 0°, the force and displacement are in the same direction, and the work done is maximum.

The formula simplifies to W = F ⋅ d, meaning all the force contributes to the displacement.

Explanation

According to Newton's First Law of Motion, the mass of an object measures its inertia.

It is the resistance of an object to changes in its state of motion.

Explanation

Polar Capacitor is not a type of capacitor

A polar capacitor is NOT a type of capacitor because it does not exist in the classification of capacitors.

a capacitor is a device that stores electrical energy.

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Explanation

When a radioactive nuclide emits a beta (β) particle, it undergoes beta decay.

In beta decay, a neutron in the nucleus is converted into a proton and an electron (the beta particle).

As a result, the atomic number (proton number) of the nucleus increases by 1.

Explanation

A cathode ray is a stream of electrons that are emitted from a cathode (negative electrode) in a vacuum tube.

These electrons carry a negative charge, as they are negatively charged particles.

Explanation

A magnetic compass is a device that responds to the presence of a magnetic field by aligning its needle with the direction of the field.

It is a common tool used to detect and measure magnetic fields.

Explanation

Ohm's Law states that the current (I) flowing through a conductor is directly proportional to the voltage (V) applied across it, and inversely proportional to the resistance (R) of the conductor.

Mathematically, this is expressed as: I = V/R Or, V = I × R

This means that as the voltage increases, the current increases, provided the resistance remains constant.