Основы электрических цепей

Front

What is an electric circuit?

Back

An electric circuit is a connection of electrical elements.

Front

What is the unit of measurement for electric charge?

Back

The unit of measurement for electric charge is the coulomb (C).

Front

Заполните пропуск: Электрический ток — это скорость изменения заряда во времени.

Back

Front

Write the mathematical expression for electric current $i$ in terms of charge $q$.

Back

$i(t) = \frac{dq(t)}{dt}$

Front

What is direct current (DC)?

Back

Direct current (DC) is a current that remains constant over time.

Front

What is alternating current (AC)?

Back

Alternating current (AC) is a current that changes sinusoidally over time.

Front

How is the voltage (or potential difference) between two points defined?

Back

Voltage is the energy required to move a unit charge through an element, measured in volts (V).

Front

Write the mathematical expression for voltage $v$ in terms of energy $w$ and charge $q$.

Back

$v = \frac{dw}{dq}$

Front

What is power and in what units is it measured?

Back

Power is the rate of energy consumption or absorption over time, measured in watts (W).

Front

Write the formula for the instantaneous power $p$ consumed by an element.

Back

$p(t) = v(t)i(t)$