Explanation

Siha-e-Sitta (Sihah al-Sittah) are the six authentic books of Hadith in Sunni Islam.

1. Sahih al-Bukhari – Compiled by Imam Muhammad al-Bukhari – 7,275 Ahadith.
2. Sahih Muslim – Compiled by Imam Muslim ibn al-Hajjaj – 9,200 Ahadith.
3. Sunan al-Nasa'i – Compiled by Imam al-Nasa'i – 5,270 Ahadith.
4. Sunan Abi Dawud – Compiled by Imam Abu Dawood – 4,800 Ahadith.
5. Jami' al-Tirmidhi – Compiled by Imam al-Tirmidhi – 3,956 Ahadith.
6. Sunan Ibn Majah – Compiled by Ibn Majah – 4,000 Ahadith.

Last verified on 07-07-2026

Explanation

• Relationship: Paternal uncle of Prophet Muhammad (PBUH)
• Embraced Islam: 5th Nabawi
• Martyred: Battle of Uhud on 22 March 625
• Title: Asadullah (Lion of Allah)

Last updated on 26 Oct 2026

Explanation

• Adopted: 29 February 1956
• Promulgated: 23 March 1956
• Abrogated by: President Iskander Mirza, 7 October 1958
• Official name: Islamic Republic of Pakistan
• Head of State: President (replaced Governor-General)
• Minimum age of President: 40 years
• Total Articles: 234
• Parts: 13
• Schedules: 6
• Form of Government: Parliamentary
• Legislature: Unicameral (one house)
• National languages: Urdu and Bengali
• System: Federal
• Parity principle: Equal representation for East and West Pakistan
• Duration: Approximately 2 years, 6 months, and 14 days.

Last updated on 26 Oct 2026

Explanation

• A couple consists of two equal and opposite parallel forces acting along different lines of action.
• The resultant force of a couple is zero, but it produces a turning effect called torque or moment of force.
• The torque of a couple is calculated by τ=F×d, where F is the magnitude of either force and d is the perpendicular distance between their lines of action.
• Turning a steering wheel with both hands is a common example of a couple.

Last verified on 26-10-2026

Explanation

• Frequency (f) = number of vibrations per second
• Time period (T) = time for one vibration
• Relation: T = 1 / f
• The time period is the time required to complete one full oscillation or cycle.

Last verified on 26-10-2026

Explanation

• Processor: Executes instructions.
• Scanner: Converts documents into digital images.
• Router: Connects networks.

Last updated on 26 Oct 2026

Explanation

• The SI unit of capacitance is the farad (F).
• Capacitance is the ability of a capacitor to store electric charge.
• One farad equals one coulomb per volt (1 F = 1 C/V).

Last verified on 26-10-2026

Explanation

Formula=SUM(AB:BC)

- SUM: Adds numbers.

- AB:BC: Selects all columns from AB to BC.

Explanation

Given:

Angle = 30°

Horizontal component Fx = 20 N

Formula: Fx = F x cos(theta)

So, F = Fx / cos(theta)

F = 20 / cos(30°)

F = 20 / 0.866

F = 23.09 N

F = 23.1 N

Last verified on 26-10-2026

Explanation

• A transformer is an electrical device used to increase or decrease alternating voltage through electromagnetic induction.
• A step-up transformer increases voltage and decreases current.
• While a step-down transformer decreases voltage and increases current, ideally keeping power approximately constant.

Last verified on 26-10-2026