Recent questions tagged t1

A gas of volume changes 2 litre to 10 litre at Constant Temperature 300K, then the change in internal energy will be :

asked Oct 9, 2017 by priyanka.c

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When volume change from V to 2V at Constant Pressure (P) then the change in internal energy will be :

asked Oct 9, 2017 by priyanka.c

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For a Rocket propulsion velocity of exhaust gases relative to rocket is $2\; km/s$. If mass of rocket system is 1000 kg, then the rate of fuel consumption for a rocket to rise up with acceleration $4.9\; m/s^2$ will be :

asked Oct 9, 2017 by priyanka.c

1 answer

If a ladder is not in balance against a smooth vertical wall, then it can be made in balance by :

asked Oct 9, 2017 by priyanka.c

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Resistance of a Galvanometer coil is $8 \Omega$ and $2 \Omega$ Shunt resistance is connected with it. If main current is $1\; A $ then the current flow through $2 \Omega $ resistance will be :

asked Oct 9, 2017 by priyanka.c

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Two coil have a mutual inductance 0.005 H. The current changes in first coil according to equation $I = I_0 \sin \omega t $ where $I_0 = 2A$ and $\omega = 100 \pi\; rad/sec$. The maximum value of emf in second coil is

asked Oct 9, 2017 by priyanka.c

1 answer

If time of mean position from amplitude (extreme) position is 6 s. Then the frequency of SHM will be :

asked Oct 9, 2017 by priyanka.c

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Work function of a meta surface is $\phi = 1.5 \;eV$. If a light of wavelength $5000Å$ falls on it then the maximum K.E of ejection electron will be -

asked Oct 9, 2017 by priyanka.c

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$10^{5}$ coloumb liberated 1 gm silver (Ag). If now charge is doubled then the amount of liberated Ag will be :

asked Oct 9, 2017 by priyanka.c

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Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod, the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidence:

asked Oct 9, 2017 by priyanka.c

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One part of a device is connected with the negative terminal of a battery and another part is connected with the positive terminal of a battery. If their ends now altered, current does not flow in circuit, then device will be

asked Oct 9, 2017 by priyanka.c

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A small ball is suspected from a thread. It is lifted up with an acceleration $4.9 ms^{-2}$ and lowered with an acceleration $4.9 ms^{-2}$ then the ratio of tensions in the thread in both cases will be :

asked Oct 9, 2017 by priyanka.c

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Two identical balls A and B are moving with velocity $+0.5 ms^{-1}$ and $-0.3 ms^{-1}$ respectively. They collide head on elastically then their velocities after collision will be :

asked Oct 9, 2017 by priyanka.c

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The speed of a boat is 5 km/hr is still water. It crosses a river of width 1 km along the shortest possible path in 15 minutes. The velocity of river water is :

asked Oct 9, 2017 by priyanka.c

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A coil of one loop is made from a wore of length L and thereafter a coil of two loops is made from same wire, then the ration of magnetic field at the centre of coils will be:

asked Oct 9, 2017 by priyanka.c

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If the light of wavelength $\lambda$ is incident on metal surface, the ejected fastest electron has speed v. If the wavelength i changed to $\frac{3 \lambda}{4}$, the speed of the fastest emitted electron will be:

asked Oct 9, 2017 by priyanka.c

1 answer

A particle of mass m is tied to a string of length L and whirled into a horizontal plan. If tension in the string is T then the speed of the particle will be :

asked Oct 8, 2017 by priyanka.c

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Half life period of two elements are 40 minute and 20 minute respectively, then after 80 minute ratio of the remaining nuclei will be (Initially both have equal active nuclei) :

asked Oct 8, 2017 by priyanka.c

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If Force $F = 500 - 100 t$, then function of impulse with time will be :

asked Oct 8, 2017 by priyanka.c

1 answer

If $x = 3 - 4t^2 + t^3$, then work done in first $4s$ will be (Mass of the particle is 3 gram) :

asked Oct 8, 2017 by priyanka.c

1 answer

A circular ring of mass M and radius R is rotating about its axis with constant angular velocity $w$. Two particle each of mass $m$ are attached gently to the opposite ends of a diameter of the ting. The angular velocity of the ring will now become :

asked Oct 8, 2017 by priyanka.c

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For protecting a magnetic needle it should be placed :

asked Oct 8, 2017 by priyanka.c

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Two pendulum suspended from same point having length 2m and 0.5m. If they displaced slightly and released then they will be in same phase, when small pendulum will have completed?

asked Oct 8, 2017 by priyanka.c

1 answer

For a wave $y = y_0 \sin (wt - kx)$, for what value of $\lambda$ is the maximum particle velocity equal to two times the wave velocity :

asked Oct 8, 2017 by priyanka.c

1 answer

Following logic gate is :

asked Oct 8, 2017 by priyanka.c

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Following table is for which logic gate:

asked Oct 8, 2017 by priyanka.c

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A hollow sphere of radius 1m is given a positive charge of $10 \mu C$. The electric field at the centre of hollow sphere will be :

asked Oct 8, 2017 by priyanka.c

1 answer

Boron has two isotopes $_5B^{10}$ and $_5B^{11}$. If atomic weight of Boron is 100.81 then ratio of $_5B^{10}$ to $_5B^{11}$ in nature will be :

asked Oct 8, 2017 by priyanka.c

1 answer

Suppose the charge of a proton and an eleckon differ slightly. One of them is - e, the other is $(e + \Delta e)$. If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance d much greater than atomic size. apart is zero, then $\Delta_e$ is of the order of [Given mass of hydrogen $m_h= 1.67 \times 10^{27}\;kg]$

asked Oct 7, 2017 by meena.p

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The x and y coordinates of the particle at any time are $x= 5t - 2t^2$ and $y = 10t$ respectivelv, where r and y are in meters and t in seconds. The acceleration of the particle at $t = 2s$ is

asked Oct 7, 2017 by meena.p

1 answer

Figure shows a circuit that contains three identical resistors with resistance R=9.0 O each, two identical inductors with inductance L=2.0 mH each, and an ideal battery with emf e: 18 V. The current 'i' through the battery just after the switch closed is,.....

asked Oct 7, 2017 by meena.p

1 answer

One end of string of length I is connected to a particle of mass 'nf and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed 'u', the net force on the particle (directed towards center) will be ([ represents the tension in the string)

asked Oct 7, 2017 by meena.p

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The de - Brogile wave length of a neutron in thermal equilibrium with heavy water at a temperature T and mass m , is

asked Oct 7, 2017 by meena.p

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A 250 N turn rectangular coil of length $2.1\;cm$ and width $1.25\;cm$ carries a current of $85 \mu A$ and subjected to magnetic field of strength $0.85\;T$ Work done for rotating the coil by $180^{\circ}$ against the torque is :

asked Oct 7, 2017 by meena.p

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A U tube with both ends open to the atmosphere, is partially filled rvith u,ater. Oil, which is imeriscible with water, is poured into one side until itstands at a distance of 10 mtrr above the water level on the other side. Meanwhile the water rises by $65\; mm$ from its original level (see diagram). The density of the oil is :

asked Oct 7, 2017 by meena.p

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Radioactive material 'A' has decay constant $8 \lambda$ and material 'B' has decay constant $\lambda$. Initially they have same number of nuclei. After what time, the ratio of number of nuclei of material 'B' to that 'A' will be $\large\frac{1}{e} $?

asked Oct 7, 2017 by meena.p

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A gas mixture consists of 2 moles of O, and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the totalintemal energv of l.he system is :

asked Oct 7, 2017 by meena.p

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A potentiometer is an accurate and versatile device to make elechical measurements of E.M.F. because the method involves :

asked Oct 7, 2017 by meena.p

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Sonia has 54 balls for 10 friends. If they all receive equal number of balls then what is the greatest number of balls one can receive?

asked Sep 20, 2017 by priyanka.c

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What is half past ten from the following?

asked Sep 20, 2017 by priyanka.c

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Subtract 34567 - 28650

asked Sep 20, 2017 by priyanka.c

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Find the perimeter of the following figure

asked Sep 20, 2017 by priyanka.c

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How many line segments are there in the following figure

asked Sep 20, 2017 by priyanka.c

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What does the value of total angle represent from the following? <br>120 + 50 =

asked Sep 18, 2017 by priyanka.c

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Find the value of the following money and express the answer in paise $Rs.2880+Rs 312.40$

asked Sep 18, 2017 by priyanka.c

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What is the prime factor of 112?

asked Sep 18, 2017 by priyanka.c

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The GCD of 6, 12, 24 is

asked Sep 18, 2017 by priyanka.c

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If % represent + & represent -, # represent (÷), and $\$$ represent x find the value of following expression $5\%7\&4\$11\#8$

asked Sep 18, 2017 by priyanka.c

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Find out the fraction for the shaded portion

asked Sep 18, 2017 by priyanka.c

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Which clock shows one and half hours less than 7:15?

asked Sep 18, 2017 by priyanka.c

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