Question is ⇒ For insulators the energy gap is of the order of, Options are ⇒ (A) 0.1 eV, (B) 0.7 eV, (C) 1.1 eV to 1.2 eV, (D) 5 to 15 eV, (E) , Leave your comments or Download question paper.

Question is ⇒ For insulators the energy gap is of the order of, Options are ⇒ (A) 0.1 eV, (B) 0.7 eV, (C) 1.1 eV to 1.2 eV, (D) 5 to 15 eV, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	For insulators the energy gap is of the order of
A.	0.1 eV [Wrong Answer]
B.	0.7 eV [Wrong Answer]
C.	1.1 eV to 1.2 eV [Wrong Answer]
D.	5 to 15 eV [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 :

⇒ In an ordinary thyristor
turn on and turn off times are equal
turn on time is more than turn off time
turn off time is more than turn on time
turn on time may be equal, less than or more than turn off time

⇒ A moving coil instrument has a resistance of 0.6 Ω and full scale deflection at 0.1 A. To convert it into an ammeter of 0-15 A range, the resistance of shunt should be
0.6 Ω
0.06 Ω
0.1 Ω
0.004 Ω

⇒ The magnetic field due to current I equals
I/2 pr
I/4 pr
I²/2 pr
I²/4 pr

⇒

Assertion (A): Power loss in a conductor of resistance P = I²R.

Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m³/ second = JE.

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

⇒ Which of the following periodic waveforms will have only odd harmonics of sinusoidal wavef
1 and 2
1 and 3
1 and 4
2 and 4

⇒ In the assembler, which one of the following is required for variable name in symbol table?
Addresses
Values
Registers
Storage

⇒ In the given figure shows the equivalent circuit of a magic tee. If all ports are mat
n_E = n_H = 2
n_E = n_H = 0.707
n_E = 2, n_H = 0.707
n_H = 0.707, n_H = 2

⇒

Assertion (A): The conductivity of an n type semiconductor increases with increase in temperature and increase in density of donor atoms.

Reason (R): Diffusion of carriers occurs in semiconductors.

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

⇒ Read the following statement

Multi-processing operation permits highly efficient parallel processing at several levels.
Multi processing involves use of several processing units jointly on a common program and severally on different programs.
In multi-processing the assignment of facilities to tasks, loading of programs and monitoring of I/O activity is taken care of by operating system.

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

⇒ A signal x(t) = 100 cos (24p x 10³t) is ideally sampled with a sampling period of 50 μ sec and then passed through an ideal low pass filter with cut off frequency of 15 kHz Which of the following frequencies are present at the filter output?
12 kHz only
8 kHz only
12 kHz and 9 kHz
12 kHz and 8 kHz

⇒ A CW transmitter radiates
modulated RF carrier
unmodulated RF carrier
both (a) and (b)
none of the above

⇒ In figure, the capacitor is charged to 1 V. At t = 0 the switch is closed so that i = e^-t. When i = 0.37 A, the voltage across capacito
1 V
0.63 V
0.37 V
0.185 V

⇒ Noise which assumes great importance at high frequencies is
flicker noise
Johnson noise
transit-time noise
shot noise

⇒ Diffraction of EM waves
arises only with spherical wave front
may occur around the edge of an obstacle
occurs when waves pass through a big slot
none of the above

⇒ If CS = A₁₅ A₁₄ A₁₃ is used as chip select logic of a 4 K RAM in 8085 system, its memory range is
3000 H - 3 FFF H
7000 H - 7 FFFH
5000 H - 5 FFF H and 6000 H - 6 FFF H
6000 H - 6 FFF H and 7000 H - 7 FFF H

⇒ TTL inverter has
one input
two inputs
one or two inputs
three inputs

⇒

Assertion (A): The polynomial s³ + 6s² + 12s + 8 is Hurwitz.

Reason (R): In a Hurwitz polynomial all coefficients are non-negative.

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

⇒ Some features of RF stage in good radio receivers is

It increases sensitivity by providing amplification to RF signal
It eliminates image frequency interference
It increases selectivity
It reduces noise level

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

⇒ A device that converts from decimal to binary numbered is called
decoder
encoder
CPU
converter

⇒ The 2 out of 5 code has
two 0s and three 0s in each code group
one 1s and four 0s in each code group
four 1s and one 0s in each code group
three 1s and two 0s in each code group

⇒ If there are M equally likely and independent messages and M = 2^N where N is an integer, the information in each message is equal to
N bits
0.5 N bits
2 N bits
4 N bits

⇒ Most of the transistor data sheets specify the power rating for an ambient temperature of
10°C
25°C
50°C
75°C

⇒ What can be the maximum dimension of an array in C language program?
3
4
5
It is compiler dependent

⇒ The number of computer viruses is some thousands.
TRUE
FALSE

⇒ The noise figure of FET circuit is
independent of the quiescent point
dependent on the quiescent point only
dependent on the triggering mechanism
independent of all above

⇒ The storage capacity of audio CD is 540 Mb per side.
TRUE
FALSE

⇒ Maximum power from a source having internal resistance R_i is delivered to a resistive load R_L, if
R_i > R_L
R_i < R_L
R_i = R_L²
R_i = R_L

⇒ Which of the following is not a non-linear element?
Transistor
Heater coil
Diode
Electric arc with unlike electrodes

⇒ How many cascaded stage of CE amplifiers will result in polarity inversion of the input signal?
Two
Three
Four
None

⇒ Which one of the following compounds is widely used for making ferrites?
FeO
CuO
MgO
Fe₂O₃