Internal Resistance All power supplies have some resistance between their terminals This is called?internal resistance?(r) Internal resistance causes some electrical energy to be transformed...
Electromotive Force When charge passes through a power supply such as a battery, it?gains?electrical energy The?electromotive force (e.m.f.)?is defined as: The amount of chemical energy converted t...
距美本第一批（北卡教堂山等）EA截止 不足?20?天 距11.01大部分Top 100高校早申截止 不足?40?天 距11.15大部分Top 70文理校ED截止 不足?50?天 美國大學(xué)本科23fall早申請正在進(jìn)行中，部分學(xué)校將在10月截止申請！今...
Potential Dividers & Variable Resistance The Potentiometer A potentiometer is a single component which can act as a potential divider. It consists of a coil of wire with a sliding contact A var...
Potential Dividers The electrical voltages rule is defined as: The sum of the e.m.f.s in a closed circuit loop is equal to the sum of the potential differences around that loop Therefore, wh...
Potential Difference & Conductor Length Potential Difference A cell makes one end of the circuit positive and the other negative. This sets up a?potential difference?across the circuit The pote...
A-Level 商務(wù)（Business Management）和A-Level 經(jīng)濟(jì)（Economy）都是商科方向的課程。于是有很多學(xué)生會(huì)在選課階段對著兩門課程糾結(jié)不已，不知道究竟該選擇哪門課程。事實(shí)上，雖然A-Level 商務(wù)（Business Manageme...
9月19日，美國大學(xué)理事會(huì)College Board?宣布大陸2023年AP考試報(bào)名正式開啟。在2022-23學(xué)年，大學(xué)理事會(huì)繼續(xù)與Prometric合作管理國內(nèi)的AP考試報(bào)名和考務(wù)工作。 美國大學(xué)先修課程(Advanced Placement)，簡稱AP課程...
Calculating Current & Drift Velocity Drift Velocity In a conductor, the current is due to the movement of charge carriers The charge carriers can be negative or positive However current ...
Core Practical 2: Investigating Resistivity Aims of the Experiment The aim of the experiment is to determine the resistivity of a length of wire Variables Independent variable?= Length,?L,?of the w...
NEC全美經(jīng)濟(jì)挑戰(zhàn)賽火熱報(bào)名中，作為為數(shù)不多的經(jīng)濟(jì)商科方向可選高中國際學(xué)術(shù)活動(dòng)，NEC是千萬不能錯(cuò)過的高價(jià)值學(xué)術(shù)活動(dòng)！ NEC全美經(jīng)濟(jì)挑戰(zhàn)賽介紹 全美經(jīng)濟(jì)學(xué)挑戰(zhàn)賽?(National Economics Challenge) 是美國最具影響...
十月，是招生的黃金季，相信在接下來的一兩個(gè)月內(nèi)，2023擇校大戲?qū)⑦M(jìn)入高潮期，提前了解考試流程及內(nèi)容，才能更加從容地面對春招大戰(zhàn)。 而最新消息顯示，光華劍橋2023年春季班招生考試將于2022年10月30日周日上午...
