Assertion (A): Alkali metals are used as emitters in phototubes.

Reason (R): Alkali metals have low work functions.

Match the following:

1. A 33 MHz 486 has higher MIPS than 33 MHz 386.
2. A 33 MHz 486 has higher MFLOPS than 33 MHz 386 of these statements.

1. As a half subtractor also
2. has two outputs C_H = x x y and S_n = x ⊕ y for two inputs x and y
3. has two outputs CH = x + y and SH = x ⊕ y for two inputs x and y
4. is a combinational circuit

Assertion (A): At room temperature the fermi level in p type semiconductor lies nearer to the valence band and in n type semiconductor it lies nearer to the conduction band.

Reason (R): At room temperature, the p type semiconductor is rich in holes and n type semiconductor is rich in electrons.