Electrical Resistivity All materials have some?resistance?to the flow of charge As?free?electrons?move?through a metal wire, they collide with ions which get in their way As a result, they?t...
Current-Potential Difference Graphs As the potential difference (voltage) across a component is increased, the current also increases (by?Ohm’s law) The precise relationship between voltage ...
Electrical Power Work is also defined as a transfer of energy When components transfer electrical energy to other stores, work must be done because energy is transferred Therefore,?potential differ...
Deriving Equations for Resistance in Series & Parallel Resistors In Series When two or more components are connected in series: The combined resistance of the components is equal to the sum of ...
Energy Conservation in Circuits The Electrical Voltages Rule (Kirchhoff's Second Law) Energy is never used up or lost in a circuit, since everything follows the Law of Conservation of Energy The el...
Charge Conservation in Circuits The Electric Current Rule (Kirchhoff's First Law) The electric current rule is defined as: The algebraic sum of the currents entering and leaving a junction is equal...
Defining Resistance Resistance Resistance is defined as the?opposition?to current It is further defined by Ohm's Law, which says that the resistance of a conductor is given by the ratio of p...
Potential Difference Potential Difference A cell makes one end of the circuit positive and the other negative This sets up a?potential difference?across the circuit This is sometimes known as the?v...
Electric Current Electric Current Electric current is defined as: The rate of flow of charge It is measured in units of?amperes (A)?or?amps The charge, current and time are related by the equation:...
決定出國(guó)必定就會(huì)面臨一系列標(biāo)化考試以及國(guó)際課程考試，這個(gè)時(shí)候一定要做好長(zhǎng)遠(yuǎn)規(guī)劃，從9年級(jí)就開始了解標(biāo)化和國(guó)際課程的備考，通過時(shí)間軸進(jìn)行合理規(guī)劃，才能更高效。 美本申請(qǐng)所需要參加的考試，比如托福、AP、S...
UCAS官網(wǎng)近期公布：2023年秋季英國(guó)本科入學(xué)申請(qǐng)注冊(cè)通道已經(jīng)開放！這也就是意味著，新一輪的申請(qǐng)大戰(zhàn)已經(jīng)開始，大家可要趕快行動(dòng)起來了！ UCAS（Universities and Colleges Admissions Service）即“大學(xué)和學(xué)院招...
根據(jù)Common App今年的最新報(bào)告顯示，2022申請(qǐng)季，國(guó)際學(xué)生遞交申請(qǐng)?jiān)鲩L(zhǎng)近31%，而中國(guó)則是最大的海外生源。由此可見，即使受疫情和政策等因素的影響，美國(guó)各大高校依然深受中國(guó)留學(xué)生歡迎！ 此前，美國(guó)College Fac...
