Explanation

Right-Hand Rule: When current flows through a straight wire, the magnetic field lines form concentric circles around the wire.

The direction of these circular field lines depends on the current direction (given by the right-hand rule: thumb points in current direction, fingers curl in field direction).

Explanation

Radioactivity is the process where an unstable atomic nucleus emits radiation (such as alpha, beta, or gamma rays) to become more stable.

It is a nuclear process, as it involves changes within the nucleus itself.

Explanation

The induced current will flow in such a direction so as to oppose the cause that produces it is the statement of Lenz's Law.

This law reflects the principle of conservation of energy in electromagnetic induction.

Explanation

For Like Charges:

1. Coulomb's Law states that like charges (both positive or both negative) exert a repulsive force on each other.

2. This is a fundamental principle of electrostatics: similar charges push each other away.

For Unlike Charges:

• Unlike charges (one positive and one negative) attract each other due to the electrostatic force of attraction.

Explanation

- The elementary charge on a single electron is -1.6 × 10⁻¹⁹ coulombs.

- It’s a fundamental physical constant.

Explanation

The term "isobaric" comes from the Greek words iso (meaning equal) and baros (meaning weight or pressure).

This means that the pressure of the system remains constant throughout the process.

In an isobaric process, the volume, temperature, and internal energy may all change. 

Explanation

A converging lens (usually convex) bends parallel rays of light to meet at a single point (focus).

It is commonly used in magnifying glasses and optical instruments.

Explanation

• Frequency is the number of occurrences of a repeating event per unit of time.
• The SI unit of frequency is the hertz (Hz).
• 1 Hz = 1 cycle or vibration per second
• Unit: Hz = s⁻¹ (per second)
• Named after physicist Heinrich Hertz
• Used for waves, oscillations, sound, and electromagnetic radiation
• Derivations from other quantities: f = 1 / T
• Dimension T^−1

Explanation

1. Work is defined as the product of force and displacement in the direction of the force: $W=\vec{F}\cdot \vec{d}=Fd\cos \theta$.

2. The result of a dot product is a scalar (magnitude only, no direction).

3. Thus, work is a scalar quantity.

Explanation

1. Newton's Law of Universal Gravitation states:

   $$\mathrm{<b><font\; color="\#0000ff">F</font></b>}<b><font\; color="\#0000ff">=</font></b>\mathrm{<b><font\; color="\#0000ff">G</font></b>}\frac{{\mathrm{<b><font\; color="\#0000ff">m</font></b>}}_{\mathrm{<b><font\; color="\#0000ff">1</font></b>}}{\mathrm{<b><font\; color="\#0000ff">m</font></b>}}_{\mathrm{<b><font\; color="\#0000ff">2</font></b>}}}{{\mathrm{<b><font\; color="\#0000ff">r</font></b>}}^{\mathrm{<b><font\; color="\#0000ff">2</font></b>}}}$$

   where $F$ is the gravitational force, $m_1$ and $m_2$ are the masses, $r$ is the distance between them, and $G$ is the gravitational constant.

2. Thus, the force depends on:

   • Product of their masses ($m_1{m}_2$)

   • Distance between masses ($r$)