Explanation

• An electric generator is a device that converts mechanical energy into usable electrical energy.
• This process is based on the principle of electromagnetic induction.
• Discovered in 1831 by British scientist Michael Faraday.

Last verified on 27-04-2026

Explanation

• The correct preposition with “proficient” is in.
• “Proficient in” means skilled or expert in a subject.
• It is commonly used with subjects like mathematics, English, science.

Last verified on 27-04-2026

Explanation

• This is a Third Conditional sentence.
• It talks about a past unreal situation.
• Structure: If + past perfect, would have + V3.
• So correct form is “had arrived”.

Last verified on 27-04-2026

Explanation

• Vitamin K helps to make various proteins that are needed for blood clotting and the building of bones.
• Prothrombin is a vitamin K-dependent protein directly involved with blood clotting.

• Vitamin C may protect the body against the effects of pollution.
• It may also prevent blood clots and reduce bruising.

Last verified on 31-03-2026

Explanation

• Battle of Yarmouk: Fought between the Byzantine Empire and Muslim forces under Khalid bin Waleed.
• Dates: August 15 to August 20, 636 AD.
• Location: Near the Yarmouk River.
• Caliphate: During the reign of Hazrat Umar (RA).
• Result: Decisive victory for the Muslims, marking the end of Byzantine rule in Syria.

Last verified on 27-04-2026

Explanation

• The Battle of Nahrawan took place in 658 CE (37 AH).
• It was fought between Ali ibn Abi Talib (R.A) and the Kharijites.
• It occurred after the Battle of Siffin.
• The Kharijites opposed Hazrat Ali’s leadership.
• Hazrat Ali (R.A) defeated them decisively.

Last verified on 27-04-2026

Explanation

• The sacred book of Zoroastrianism is the Zend Avesta (Avesta).
• It contains teachings of the prophet Zoroaster (Zarathustra).
• It focuses on the concept of good vs evil (Ahura Mazda vs Angra Mainyu).
• It is one of the oldest religious texts in the world.
• It was originally written in the Avestan language.

Last verified on 27-04-2026

Explanation

• The Qibla was changed in 2 AH (624 AD).
• It happened during the Zuhr (Dhuhr) prayer.
• This event took place about 18 months after Hijrah in Madinah.
• The Qibla was changed from Bait al-Maqdis (Al-Aqsa Mosque) to Kaaba.
• Masjid al-Qiblatain is the mosque where this change occurred.
• The first Qibla of Muslims was Al-Aqsa Mosque.
• The change of Qibla is mentioned in the Holy Quran (Surah Al-Baqarah).

Last verified on 25-05-2026

Explanation

• The first official compilation of the Qur’an as a complete Mus’haf was done during the caliphate of Abu Bakr al-Siddiq (R.A).
• It was done after the Battle of Yamama (633 CE) when many Huffaz were martyred.
• Hazrat Umar (R.A) suggested compiling the Qur’an.
• Zaid bin Thabit (R.A) was assigned this important task.
• Final standard Mushaf distributed during Usman (R.A) era.

Last verified on 27-04-2026

Explanation

• The G20 Summit 2025 was hosted by South Africa.
• It is organized under G20, a major global economic forum.
• The summit was scheduled for 22–23 November 2025.
• Theme: Solidarity, Equality, and Sustainability.
• It focuses on global economic cooperation.

Additional information:

• Founded: 1999
• Members: 19 countries + European Union
• 2023 host: India
• 2024 host: Brazil

Last verified on 27-04-2026