A student wires a bridge rectifier incorrectly as shown in Figure. Explain what you would expect to observe when an oscilloscope is connected across the load resistor R.

A bridge rectifier circuit that is wired incorrectly.

A bridge rectifier circuit is used to rectify an alternating current through a resistor. A smoothing capacitor is connected across the resistor. Figure shows how the current varies. Use sketches to show the changes you would expect:

A smoothed, rectified current as the resistance R of the resistor is increased.

A bridge rectifier circuit is used to rectify an alternating current through a resistor. A smoothing capacitor is connected across the resistor. Figure shows how the current varies. Use sketches to show the changes you would expect:

A smoothed, rectified current.

(b) if the capacitance C of the capacitor is decreased.

The maximum power dissipated in a resistor carrying an alternating current is $10 \mathrm{W}$. What is the mean power dissipated in the resistor?

The alternating current I in ampere (A) in a filament lamp is represented by the equation $I=1.5\sin \left(40t\right)$. Identify peak current and angular frequency.

Write down a general expression for the sinusoidal variation with time t of an alternating voltage V.

Write down a general expression for the sinusoidal variation with time t of an alternating current I (you may assume that I and V are in phase).

Write down a general expression for the sinusoidal variation with time t of the power P dissipated due to this current and voltage.

The alternating current I in ampere (A) in a circuit is represented by the equation $I=2.0\sin \left(50\mathrm{\pi t}\right)$. State the peak value of the current.