Question $3.(3$ marks$)$

The figure below contains the operational parts of a cathode ray oscilloscope. Write the names of Knob $9,2$ and $3.$

Answer here:

$(1)$ infenflofy

$(2)$ focus

$(3)$ Vertical surft

Section B$,$ True or False questions.

Question $1.(1$ mark$)$

Select all true statements below.

$($a$)\backslash ($ L C $\backslash )$ circuits can be used to filter low frequency signals.

$($b$)$ High pass filters can be used to filter low frequency signals.

circuit.

$($c$)$ High pass filters can be combined with low pass filters to form a resonaht

$($d$)$ impedance is the reason why current is not important in a transformer.

$($e$)$ None of the above