Question is ⇒ The forbidden energy gap between the valence band and conduction band will be wide in case of, Options are ⇒ (A) semiconductors, (B) all metals, (C) good conductors of electricity, (D) insulators, (E) , Leave your comments or Download question paper.

Question is ⇒ The forbidden energy gap between the valence band and conduction band will be wide in case of, Options are ⇒ (A) semiconductors, (B) all metals, (C) good conductors of electricity, (D) insulators, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The forbidden energy gap between the valence band and conduction band will be wide in case of
A.	semiconductors [Wrong Answer]
B.	all metals [Wrong Answer]
C.	good conductors of electricity [Wrong Answer]
D.	insulators [Correct Answer]
View Answer 1 -1 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Which type of modulator amplifier is used in AM transmitter?
Class A
Class B
Classes AB
Class C with negative feedback

⇒ The minimum number of comparators required to build an 8 bit flash ADC is
8
63
255
256

⇒ If a dipole is meant for a frequency of 1 MHz, the length of each rod is about
5 m
20 m
100 m
50 m

⇒ Read the following statements about Java

It is well suited to design software which works in conjunction with internet.
It is cross platform language.
Java is close to programming language C, C ++ etc.
It is an object oriented.

Which of the above are correct?
All
1, 2 and 3 only
1, 2 and 4 only
2, 3, 4 only

⇒

Assertion (A): A multiplexer can be used for data routing.

Reason (R): A multiplexer has one input and many outputs.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true

⇒ For broadcasting purpose, full AM signal is preferred to SSB signal because
it requires large bandwidth
generation of full AM is easier
detection of full AM is simpler
none of the above

⇒ At 20 GHz , the gain of a parabolic dish antenna of 1 meter diameter and 70% efficiency is
15 dB
25 dB
35 dB
45 dB

⇒ The op-amp circuit shown in the figure is a filter. The type of filter and its cut off type of filter and its cut off frequency are respectiv
high Pass, 1000 rad/sec
low Pass, 100 rad/sec
high Pass, 10000 rad/sec
low pass, 10000 rad/sec

⇒ The application of gate signal decreases the break over voltage of on SCR.
TRUE
FALSE

⇒ Consider the following stateme
1 and 2
2 and 3
3 and 4
4 and 5

⇒ The signal flow graph of a system is shown in the given figure. The effect of disturbance T_D can be reduce
increasing G₂ (s)
decreasing G₂ (s)
increasing G₁ (s)
decreasing G₁ (s)

⇒

Match the following:

	List I		List II
A.	Silicon	1.	is trivalent
B.	Arsenic	2.	rarely used as semiconductor
C.	Indium	3.	is pentavalent
D.	Germanium	4.	intrinsic semiconductor

A-1, B-2, C-3, D-4
A-4, B-3, C-2, D-1
A-4, B-3, C-1, D-2
A-2, B-1, C-3, D-4

⇒ If a number of odd functions are added, the resultant sum is
even function
odd funtion
either even or odd function
mixture of odd amd even functions

⇒ On the basis of the type of chemical bonds, solids may be classified into
ionic crystals
ionic and valence crystals
ionic crystal, valence crystals and metals
ionic crystals, valence crystals, metal and vander wall crystals

⇒ Pico-farad is equal to
10^-6 farad
10^-12 farad
10^-3 farad
10^-9 farad

⇒ The accuracy of measurement using CRO is about
± 0.5%
± 0.05 %
± 1%
± 3%

⇒ The device most likely to be found in an SSB transmitter is
class C audio amplifier
tuned modulator
class B RF amplifier
class A RF amplifier

⇒ To avoid the effect of stray magnetic fields in ac bridge we can use
magnetic screening
Wagner earthing device
wave filter
transformer

⇒ The noise figure of individual stages of a two stage amplifier is 2.03 and 1.54 respectively. If gain of first stage is 62, the overall noise figure is
2.03
2.055
3.05
6.05

⇒ Specific resistance of silver is about
0.16 x 10^-8 Ω-m
1.64 x 10^-8 Ω-m
16 x 10^-8 Ω-m
164 x 10^-8 Ω-m

⇒ VLF waves are sometimes used because
they penetrate the ionosphere easily
they are very reliable
they require low power
they require transmitting antennas of convenient sizes

⇒ A rectangular waveguide has a discontinuity in the form of reduced narrow dimension. In the equivalent circuit this discontinuity can be represented by
a shunt capacitance at the discontinuity
a shunt inductance at the discontinuity
a shunt resistance at the discontinuity
none of the above

⇒ A delta connection contains three impedances of 60 Ω each. The impedances of equivalent star connection will be
15 Ω
20 Ω
30 Ω
40 Ω

⇒ The number of TV channels which can be accommodated in a spectrum of 300 MHz is about
5
10
50
200

⇒ A dielectric is subjected to alternating field. The dielectric losses are potential to
real part of dielectric constant
imaginary part of dielectric constant
both real and imaginary parts of dielectric constant
either real or imaginary part of dielectric constant

⇒ Which of the following 8085 instructions does not belong to arithmetic group?
SHLD addr
SUI data
ADCM
INR r

⇒

Assertion (A): Impulse function is an important function in network analysis.

Reason (R): Convolution integral enables us to find the response of a network to an arbitary input in terms of the impulse response.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true

⇒ The resistivity of a semiconductor
increases as the temperature increases
decreases as the temperature increases
remains constant even when temperature varies
none of the above

⇒ Consider a situation where number of minterms with even number of 0's are same as number of minterms with odd number of 1's. Then minterms with even number of 0's and minterms with odd number of 1's are __________ to each other then number of variables is __________ .
equivalent, even
complement, odd
complement, even
none of these

⇒ In satellite communication, frequency modulation is used because satellite channel has
small bandwidth and negligible noise
large bandwidth and severe noise
maximum bandwidth and minimum noise
high modulation index