GCSE Physics - Alternating Current & Direct Current | AC & DC (2026/27 exams)
2:53
YouTubeCognito
GCSE Physics - Alternating Current & Direct Current | AC & DC (2026/27 exams)
⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. Alternating Current (AC) * The direction of current is constantly swapping back and forth. * It is produced by an alternating potential difference. * AC is represented by a sine wave on a voltage-time graph. 2. UK Mains Supply as an Example of AC * The UK ...
已浏览 999 次1 周前
BBC Bitesize Revision
Troops in eastern Ukraine speak to the BBC | BBC News
7:36
Troops in eastern Ukraine speak to the BBC | BBC News
YouTubeBBC News
已浏览 5.5万 次1 天前
Donald Trump criticises ‘decaying’ European countries and ‘weak’ leaders | BBC News
5:14
Donald Trump criticises ‘decaying’ European countries and ‘weak’ leaders | BBC News
YouTubeBBC News
已浏览 11.5万 次1 天前
Donald Trump tells Ukraine it’s losing war with Russia and must accept peace deal | BBC News
8:37
Donald Trump tells Ukraine it’s losing war with Russia and must accept peace deal | BBC News
YouTubeBBC News
已浏览 8.8万 次1 天前
热门视频
GCSE Physics - Electric Fields - Field Lines | Ionisation of Air (2026/27 exams)
3:29
GCSE Physics - Electric Fields - Field Lines | Ionisation of Air (2026/27 exams)
YouTubeCognito
已浏览 56 次8 小时之前
GCSE Physics - Plugs & Wires - Earth Wire | Neutral Wire | Live Wire (2026/27 exams)
3:53
GCSE Physics - Plugs & Wires - Earth Wire | Neutral Wire | Live Wire (2026/27 exams)
YouTubeCognito
已浏览 751 次5 天之前
GCSE Physics - Fuses & Earthing | Safety Precautions to Reduce Risks from Surges (2026/27 exams)
4:31
GCSE Physics - Fuses & Earthing | Safety Precautions to Reduce Risks from Surges (2026/27 exams)
YouTubeCognito
已浏览 293 次2 天之前
BBC Bitesize Subjects
Thailand and Cambodia launch fresh strikes in ongoing border dispute | BBC News
3:14
Thailand and Cambodia launch fresh strikes in ongoing border dispute | BBC News
YouTubeBBC News
已浏览 5.4万 次1 天前
Revolutionary gene therapy brings hope of leukaemia cure | BBC News
5:32
Revolutionary gene therapy brings hope of leukaemia cure | BBC News
YouTubeBBC News
已浏览 4.6万 次2 天之前
How was almost £11bn lost in fraud during the UK Covid pandemic? | BBC Newscast
30:26
How was almost £11bn lost in fraud during the UK Covid pandemic? | BBC Newscast
YouTubeBBC News
已浏览 1.8万 次1 天前