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Recent questions tagged physics
Questions
Which of the following quantity associated with the resistor, does not change with temperature
jeemain
physics
current-electricity
cbse
class12
ch4
electric-current-concepts
easy
asked
Feb 3, 2014
by
thanvigandhi_1
1
answer
The net resistance of a voltmeter should be large to ensure that
jeemain
physics
current-electricity
cbse
class12
ch4
concepts
electric-current-concepts
easy
asked
Feb 3, 2014
by
thanvigandhi_1
1
answer
The net resistance of an ammeter should be small to ensure that
jeemain
physics
current-electricity
cbse
class12
ch4
electric-current-concepts
easy
asked
Feb 3, 2014
by
thanvigandhi_1
1
answer
Consider the charging of a capacitor. Let $Q_1$ be the charge given to it in first t seconds and $Q_2$ be the charge given to it in the next t seconds. Also, let $t_1$ be the time required to deposit a charge Q (less than half the maximum charge) and $t_2$ be the time required to deposit an additional charge of Q, then:
jeemain
physics
electrostatic-potential-and-capacitance
cbse
class12
ch2
medium
q5
asked
Feb 3, 2014
by
thanvigandhi_1
1
answer
In an electric circuit containing a battery, the charge (positive by convention) inside the battery
jeemain
physics
current-electricity
cbse
class12
ch3
electric-current-concepts
medium
asked
Feb 3, 2014
by
thanvigandhi_1
1
answer
The work done in placing a charge of $\;8\times10^{-18}\;$ coulomb on a condenser of capacity 100 micro-farad is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
parallel-plate-capacitor
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
Four dipols each of magnitudes of charges $\;\pm q\;$ are placed inside a sphere . The total flux of $\overrightarrow{E}\;$ coming out of the sphere is
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
gausss-law
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
Two isolated charged conducting spheres of radii a and b produce the same electric field near their surfaces . The ratio of electric potential on their surfaces is
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatics-of-conductors
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
Three concentric conducting spherical shells carry charges +4Q on the inner shell , -2Q on the middle shell and +6Q on the outer shell . The charge on the inner surface of outer shell is
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-charge
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
The electric field in a region is given by $\;\overrightarrow{E}=\alpha \hat{i}+\beta \hat{j}\;.$ Here $\;\alpha\; and \; \beta\;$ are constants . The net flux through a square are of side l parallel to y - z plane
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-flux-and-dipole
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
ABC is an equilateral triangle of each side 5 cm . Two charges of $\;\pm\large\frac{50}{3}\times10^{-3}\;\mu C\;$ are placed at B and A respectively . Find the magnitude of resultant field at C .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
Two point charges of 5C and 20C are separated by a distance of 6m . Find the point on the line joining them at which electric field intessity is zero .
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
electric-field
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
If the electric flux entering and leaving an enclosed surface is $\phi_{1}\;and\;\phi_{2}\;.$ The charge inside the surface will be
jeemain
physics
class12
ch1
electrostatics
electric-charges-and-fields
gausss-law
easy
asked
Feb 3, 2014
by
yamini.v
1
answer
Gas-A is kept in the left partition of the container with a temperature of T at pressure 2P. Gas-B is kept in the right part of the container with a temperature of 4T at pressure P. When what is the value of the Pressure P' when the partition is removed?
molecular-nature-of-matter
jeemain
physics
kinetic-theory-of-gases
class11
ch13
behaviour-of-gases
ideal-gas-law
medium
asked
Jan 31, 2014
by
balaji
1
answer
Gas-A is kept in the left partition of the container with a volume 2V at pressure P. Gas-B is kept in the right part of the container with a volume of 3V at pressure P. Both the portions are the same temperature T. When what is the value of the Pressure P' when the partition is removed?
molecular-nature-of-matter
jeemain
physics
kinetic-theory-of-gases
class11
ch13
behaviour-of-gases
ideal-gas-law
easy
asked
Jan 31, 2014
by
balaji
1
answer
Gas-A is kept in the left partition of the container with a volume V/n at pressure P. Gas-B is kept in the right part of the container with a volume of V/(n+1) at pressure P. Both the portions are the same temperature T. When what is the value of the Pressure P' when the partition is removed?
molecular-nature-of-matter
jeemain
physics
kinetic-theory-of-gases
class11
ch13
behaviour-of-gases
ideal-gas-law
easy
asked
Jan 31, 2014
by
balaji
1
answer
Consider the following case. What is the value of P' ?
molecular-nature-of-matter
jeemain
physics
kinetic-theory-of-gases
class11
ch13
behaviour-of-gases
ideal-gas-law
medium
asked
Jan 31, 2014
by
balaji
1
answer
Hot air balloon is an application of what law?
jeemain
physics
kinetic-theory-of-gases
easy
class11
ch13
behaviour-of-gases
ideal-gas-law
charles-law
asked
Jan 31, 2014
by
balaji
3
answers
Bursting of a soda bottle in summer is an example of ?
jeemain
physics
kinetic-theory-of-gases
easy
class11
ch13
behaviour-of-gases
ideal-gas-law
guy-lussacs-law
asked
Jan 31, 2014
by
balaji
1
answer
Which of the following graphs will be linear with zero slope in case of an ideal gas?
jeemain
physics
kinetic-theory-of-gases
class11
ch13
ideal-gas-law
easy
behaviour-of-gases
asked
Jan 31, 2014
by
balaji
1
answer
Two diatomic gases have denisities d1 and d2 under similar conditions. The ratio of the root mean square velocities is?
jeemain
physics
kinetic-theory-of-gases
speed-of-molecules
easy
class11
ch13
kinetic-theory-of-an-ideal-gas
asked
Jan 31, 2014
by
balaji
1
answer
A container contains an ideal gas. The wall is hit by "n" molecules / second, each of mass "m" and moving the same velocity "u". The force exerted by the molecules on the wall is?
jeemain
physics
kinetic-theory-of-gases
speed-of-molecules
medium
class11
ch13
kinetic-theory-of-an-ideal-gas
asked
Jan 31, 2014
by
balaji
1
answer
An ideal gas kept in vessel has rms spped of 200 m/s. If 10% of the gas leaks out of the vessel, then the rms speed of the remaining molecules is?
jeemain
physics
kinetic-theory-of-gases
speed-of-molecules
medium
class11
ch13
kinetic-theory-of-an-ideal-gas
asked
Jan 31, 2014
by
balaji
1
answer
A liquid is boiled and its temperature (T) versus Heat supplied (Q) graph is plotted. Which of the following is the correct graph?
jeemain
physics
kinetic-theory-of-gases
cbse
medium
class11
ch13
xtra
asked
Jan 31, 2014
by
balaji
1
answer
If for an ideal gas, $\large\frac{R}{C_v} $$= 0.29$, it's shape is?
jeemain
physics
kinetic-theory-of-gases
class11
ch13
easy
specific-heat-capacity
molar-specific-heat
asked
Jan 31, 2014
by
balaji
1
answer
In the circuit given below the value of current is :
jeemain
physics
class12
ch14
q100
easy
mock
junction-diodes
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
A transistor is connected in common emitter mode. In the collector circuit the voltage drop across the resistor of $800 \; \Omega$ is $0.5 V$ . If current gain $\alpha$ is $0.96$ What is base current
jeemain
physics
class12
unit19
ch14
q99
medium
transistors
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
When forward bias is applied to a p-n junction.
jeemain
physics
class12
unit19
ch14
q98
easy
semiconductor-electronics
concepts
pn-junction
asked
Jan 31, 2014
by
meena.p
1
answer
Functions of rectifier is
jeemain
physics
class12
unit19
ch14
q88
easy
asked
Jan 31, 2014
by
meena.p
1
answer
The graph given below represents the I-V characteristics of a zener diode. Which part of the curve is relevant for operation as voltage regulator?
jeemain
physics
class12
unit19
ch14
q96
easy
junction-diodes
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
In extrinsic semiconductors
jeemain
physics
class12
unit19
ch14
q95
easy
asked
Jan 31, 2014
by
meena.p
1
answer
To obtain a p-type semiconductor germanium is doped with
jeemain
physics
class12
unit19
ch14
q94
easy
asked
Jan 31, 2014
by
meena.p
1
answer
To obtains p-type germanium semiconductor it must be doped with
jeemain
physics
class12
unit19
ch14
q93
easy
asked
Jan 31, 2014
by
meena.p
1
answer
Zener diode :
jeemain
physics
class12
unit19
ch14
q92
easy
asked
Jan 31, 2014
by
meena.p
1
answer
A Diode Laser
jeemain
physics
class12
unit19
ch14
q91
easy
semiconductor-electronics
concepts
diode
asked
Jan 31, 2014
by
meena.p
1
answer
To make a full wave rectifier using these four diodes, the ac input should be applied across what?
jeemain
physics
class12
unit19
ch14
q90
junction-diodes
semiconductor-electronics
easy
asked
Jan 31, 2014
by
meena.p
1
answer
When a solid with a band gap has a donor level just below its empty energy band, its solid is
jeemain
physics
class12
unit19
ch14
q89
easy
semiconductor-electronics
concepts
asked
Jan 31, 2014
by
meena.p
1
answer
Which of the following logic gate is an universal gate
jeemain
physics
class12
unit19
ch14
q88
easy
logic-gates
semiconductor-electronics
concepts
asked
Jan 31, 2014
by
meena.p
1
answer
In Boolean Algebra what is value of $A.B+A.C.B$
jeemain
physics
class12
unit19
ch14
q87
easy
logic-gates
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
Using law of Boolean Algebra the value of $A+(\bar {A}B)$
jeemain
physics
class12
unit19
ch14
q86
easy
logic-gates
semiconductor-electronics
concepts
asked
Jan 31, 2014
by
meena.p
1
answer
In half wave rectifier if the D.C component at output is $\large\frac{10}{\pi} $$V$ What is the peak value of sinusoidal input signal.
jeemain
physics
class12
unit19
ch14
q85
sec-a
easy
junction-diodes
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
Transistor working as an amplifier operates in its active region of characteristic only when
jeemain
physics
class12
ch14
q84
easy
semiconductor-electronics
concepts
asked
Jan 31, 2014
by
meena.p
1
answer
Electric potential is given by $\;V=2x^2\;$ Find the electric field at $\;(1 ,0 ,2)\;$ in Volt/metre.
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
electrostatic-potential
easy
asked
Jan 31, 2014
by
yamini.v
1
answer
In the circuit given below if the output $D=1$ the input must be
jeemain
physics
class12
unit19
ch14
q83
medium
logic-gates
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
which of the following represents the system of logic gates given below.
jeemain
physics
class12
unit19
ch14
q82
medium
logic-gates
semiconductor-electronics
asked
Jan 31, 2014
by
meena.p
1
answer
If the 0 and 1 are inputs for a NAND gate what would be the output?
jeemain
physics
class12
unit19
ch14
q81
easy
logic-gates
semiconductor-electronics
concepts
asked
Jan 30, 2014
by
meena.p
1
answer
The following circuit can be reduced to what type of a gate?
jeemain
physics
class12
unit19
ch14
q80
medium
logic-gates
semiconductor-electronics
asked
Jan 30, 2014
by
meena.p
1
answer
If there are n capacitors in parallel connected to V volt source , then energy stored is equal to
jeemain
physics
class12
ch2
electrostatics
electrostatic-potential-and-capacitance
combination-of-capacitors
easy
asked
Jan 30, 2014
by
yamini.v
1
answer
The NOR gate can be represented by which venn diagram ?
jeemain
physics
class12
unit19
ch14
q79
medium
asked
Jan 30, 2014
by
meena.p
1
answer
Which of the statement about NOT gate is true?
jeemain
physics
class12
unit19
ch14
q78
easy
semiconductor-electronics
concepts
logic-gates
asked
Jan 30, 2014
by
meena.p
1
answer
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