Match the following:

	List I		List II
A.	DMA controller	1.	Interface between computer and video display adapter
B.	CKT controller	2.	Used to read data directly from disk into directly memory
C.	Interrupt controller	3.	Supervises the operation of control signal

The quantities required to be measured in microwave circuits are frequency, power and impedance.

Microwave frequency measurement is done by slotted line, resonant cavities and transfer oscillator.

Microwave power measurement uses bolometers and microwave power meters.

A self balancing bridge working on the principle of power substitution is commonly used.

Microwave impedance measurement is done by measurement of reflection coefficient and VSWR.

A slotted line and probe is a basic tool for these measurements.' Network analyser enables rapid impedance measurement over a broad frequency range.

Voltage across capacitor = voltage across 3? resistance =

All these characteristics are important.

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Since a TRIAC can conduct in both directions it is bi directional SCR.

In look ahead carry adder the carry is directly derived from the gates when original inputs are being added. Hence the addition is fast. This process requires more gates and is costly.