Recent questions and answers in 2004

In transgenics expression of transgene in target tissue is determined by :-

answered Feb 26, 2020 by pmandal5798

2 answers

A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from :-

answered Feb 24, 2020 by tearsofpain141

2 answers

Ovulation in the human female normally takes place during the menstrual cycle -

answered Nov 18, 2019 by harshashavalkar

2 answers

A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness e and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be :-

answered Nov 18, 2019 by meena.clay6

1 answer

A galvanometer of 50 ohm resistance has 25 divisions. A current of $4\times 10^{-4}$ ampere gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volts, it should be connected with a resistance of

answered Nov 18, 2019 by meena.clay6

1 answer

Five equal resistances each of resistance R are connected as shown in the Figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be

answered Nov 18, 2019 by meena.clay6

1 answer

A battery is charged at a potential of 15V for 8 hours when the current flowing is 10A. The battery on discharge supplies a current of 5A for 15 hours. The mean terminal voltage during discharges is 14 V. The "Watt hour" efficiency of the battery is :-

answered Nov 18, 2019 by meena.clay6

2 answers

One mole of an ideal gas at an initial temperature of T K does 6 R joules of work adiabatically. If the ratio of specific heats of this gas at consta pressure and at constant volume is $\frac {5} {3}$, the final temperature of gas will be :-

answered Nov 18, 2019 by meena.clay6

2 answers

A coil of 40 henry inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 volt battery. The time constant of the circuit is :-

answered Nov 18, 2019 by meena.clay6

1 answer

An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipol moment is along the direction of the field, the force on it and its potential energy are respectively :-

answered Nov 18, 2019 by meena.clay6

1 answer

The output of OR gate is 1 :-

answered Nov 18, 2019 by meena.clay6

1 answer

The Bohr model of atoms :-

answered Nov 18, 2019 by meena.clay6

1 answer

In a p–n junction photo cell, the value of the photo electromotive force produced by monochromatic light is proportional to: -

answered Nov 18, 2019 by meena.clay6

1 answer

The coefficient of static friction, µs, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move ? The string and the pulley are assumed to be smooth and massless. ($g = 10 m/s^{2}$)

answered Nov 18, 2019 by meena.clay6

2 answers

If $\mid \overrightarrow{A}\times \overrightarrow{B}\mid=\sqrt{3} \overrightarrow{A}.\overrightarrow{B}$ then the value of $\mid \overrightarrow{A}+ \overrightarrow{B}\mid$ is:

answered Nov 18, 2019 by meena.clay6

1 answer

Consider a system of two particles having masses $m_1$ and $m_2$ . If the particle of mass $m_1$ is pushed towards the mass centre of particles through a distance 'd', by what distance would the particle of mass $m_2$ move so as to keep the mass centre of particles at the original position

answered Nov 18, 2019 by meena.clay6

1 answer

A wheel having moment of inertia $2 kg–m ^{2}$ about its vertical axis, rotates at the rate of 60 rpm about the axis. The torque which can stop the wheel's rotation in one minute would be :-

answered Nov 18, 2019 by meena.clay6

1 answer

Energy E of a hydrogen atom with principal quantum number n is given by $E=\frac{-13.6} {n^{6}}eV$. n The energy of a photon ejected when the electron jumps from n = 3 state to n = 2 state of hydrogen is approximately :-

answered Nov 18, 2019 by meena.clay6

1 answer

Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side l cm. (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram$\; cm ^2$ units will be :-

answered Nov 18, 2019 by meena.clay6

1 answer

A block of mass m is placed on a smooth wedge of inclination $\theta$. The whole system is accelerated horizontally so that the block does not slip on th wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be :-

answered Nov 18, 2019 by meena.clay6

1 answer

The phase difference between two waves, $y_{1}=10^{-6} \sin \{100t+(x/50)+0.5\}m$ $y_2=10^{-6} \cos \{100t+(\frac{ x} {50})\}m$ Where X is expressed in metres and t is expressed in seconds, is approximately : -

answered Nov 18, 2019 by meena.clay6

1 answer

A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is 5000 Å, is of the order of-

answered Nov 18, 2019 by meena.clay6

1 answer