CAIE A-Level Physics A2 21.2.1 Distingui…fication

[Maximum number: 5]

Four diodes are used in a bridge rectifier circuit to produce rectification of a sinusoidal a.c. input voltage $V_{\text {IN }}$ .
Fig. 7.1 shows part of the circuit, but three of the diodes are missing.

Fig. 7.1

The p.d. across the load resistor R is the output p.d. $V_{\text {OUT }}$ of the bridge rectifier.

(a)

$V_{\text {IN }}$ has amplitude $V_{0}$ and period T. Fig. 7.2 shows the variation with time t of $V_{\text {IN }}$ .

Fig. 7.2

[ 5 ]

(i)

On Fig. 7.3, sketch the variation of $V_{\text {OUT }}$ with t between t=0 and t=2.0 T.

Fig. 7.3

[ 3 ]

sketch: periodic line showing minimum $V_{\text {OUT }}=0$ and maximum $V_{\text {OUT }}=+V_{0}$
line showing peak $V_{\text {OUT }}$ at t=0,0.5 T, 1.0 T, 1.5 T and 2.0 T, with $V_{\text {OUT }}$ going to zero half-way in between each peak
line showing correct modulated sine shape

(ii)

The power dissipated in the resistor is P.

On Fig. 7.4, sketch the variation of P with t between t=0 and t=2.0 T.

Fig. 7.4

[ 2 ]

CAIE A-Level Physics A2 21.2.1 Distinguish Graphically Between Half Wave and Full Wave Rectification Topic Practice

Question 1

Question (a)

Question (i)

Question (ii)