Explanation

The SI unit for electromotive force (EMF) is the Volt (symbol: V).

One volt represents one joule of energy provided per coulomb of electric charge. 

Explanation

A wave that results from simple harmonic motion (SHM) is called a sine wave, or a sinusoidal wave.

This is because the pattern of displacement, velocity, and acceleration in SHM is represented by a sine function over time. 

Explanation

The frequency of AC (Alternating Current) supply in Pakistan is typically 50 Hertz (Hz).

AC electricity alternates back and forth in a direction 50 times per second

Explanation

In simple harmonic motion (S.H.M), the restoring force is minimum at Mean position. 

The restoring force is directly proportional to the displacement from the mean position.

At the mean position, the displacement is zero, meaning the restoring force is also zero at that point. 

Explanation

- Current is the same through all resistors connected in series.  

- Total resistance (R_total) = R₁ + R₂ + R₃ + ... (sum of all resistances).  

- Voltage divides across each resistor according to their resistance (Ohm’s law: V = IR).  

- If one resistor breaks, the entire circuit stops working (open circuit).  

- Series circuits have only one path for current flow.  

Explanation

In a series circuit, the net (or total) resistance is the sum of all the individual resistances.

You can calculate it by adding together the values of each resistor in the circuit using the formula: R_total = R1 + R2 + ... + Rn.  

Explanation

The number of vibrations or oscillations made in one second is called the frequency of vibration

Common symbols f, ν

SI unit hertz (Hz)

Other units

cycle per second (cps) revolution per minute (rpm or r/min)

In SI base units s−1

Derivations from other quantities f = 1 / T

Dimension T−1

Explanation

The study of Carbon and its compounds belongs to the branch of chemistry known as Organic Chemistry.

Organic chemistry is dedicated to understanding the structure, properties, composition, and reactions of carbon-based molecules, including those found in living organisms. 

Explanation

Chemical Name: Sodium Carbonate 

Chemical Formula: Na₂CO₃ 

Common Names: Sodium carbonate, washing soda, calcined soda, disodium carbonate 

Characteristics:

It is a white, odorless solid that is water-soluble. 

When dissolved in water, it forms a moderately alkaline solution. 

It is a strong base. 

Explanation

Temporary hardness caused by calcium and magnesium bicarbonates is removed by boiling, 

A process that converts the soluble bicarbonates into insoluble carbonates or hydroxides, which then precipitate out of the water.

These precipitates, such as calcium carbonate and magnesium hydroxide, can be filtered out, leaving softer water.