Questions

Electric current is measured by the instrument called ammeter. As current in a circuit is measured in amperes, the instrument used is called as ammeter.

The red blood corpuscles  or erythrocytes usually carry antigens and there are two types of antigens. The A group persons have antigen A in their red corpuscles and the B group have antigen B in their red corpuscles. The AB group person have both antigen A and antigen B in their erythrocytes. The 'O' group persons have no antigens in their red corpuscles.

Words that sound the same but are spelled different are called homophones. Homophones are a type of homonyms.

Some of the Examples of homophones are ::

One - Won

Son - Sun

Hole - Whole

Loan - Lone

Steal - Steel

Which - Witch

What - Watt

Sea - See

Electronegativity is the tendency for an atom to attract electrons. There are general trends on the periodic table which you can use to determine the relative electronegativity for different elements, but otherwise you can also look at their valence shell and effective nuclear charge to determine their relative electronegativity.

Here from the given options, Lithium has least tendency to attract electrons and thus has a lower electronegativity.

The Micro Processor enters into Halt-State and the buses are tri-stated.