In a ionised gas,the mobile charge carriers are
Options
(a) electrons (b) both positive ad negative ions (c) electrons and positively charged ions (d) positive ions only
Correct Answer:
electrons and positively charged […]
In a vaccum triode the function of grid voltage is
Options
(a) To maintain electron flow (b) To increase the voltage (c) For long lasting of valve (d) To check the flow of […]
When germanium is doped with phosphorus what type of semiconductor is produced?
Options
(a) N-type (b) P-type (c) Both (a) and (b) (d) None of these
Correct Answer:
N-type
Explanation:
No explanation available. […]
The term liquid crystal refers to a state that is intermediate between
Options
(a) Crystalline solid and amorphous liquid (b) Crystalline solid and vapour (c) Amorphous liquid and its vapour (d) A crystal […]
In a transistor the collector current is always less than the emitter current because
Options
(a) Collector side is reverse biased and the emitter side is forward biased (b) A few electrons are […]
Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å. The value of lattice constant for this lattice is
Options
(a) 2.54 Å (b) 3.59 Å (c) 1.27 Å (d) 5.08 […]
The minimum number of NAND gates used to construct an OR gate is
Options
(a) 4 (b) 6 (c) 5 (d) 3
Correct Answer:
3
Explanation:
No explanation available. Be the first to […]
For the action of a common Base (CB) transistor, (E=emitter, B= base, C= collector) the required CB, EB junction bias conditions are
Options
(a) Both EB and CB junction forward bias (b) Both […]
If α (current gain) of transistor is 0.98, then what is the value of β (current gain) of the transistor?
Options
(a) 0.49 (b) 49 (c) 4.9 (d) 5
Correct Answer:
49
Explanation: […]
In an NPN transistor the collector current is 24 mA. If 80% of the electrons reach collector, its base current in mA is
Options
(a) 36 (b) 26 (c) 16 (d) 6
Correct Answer: […]
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