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Recent questions tagged t1

Which of the following pairs of compounds is isoelectronic and isostructural ?

asked Nov 2, 2017 by meena.p

0 answers

With respect to the conformers of ethane, which of the following statements is true ?

asked Oct 31, 2017 by meena.p

0 answers

The resistance of a wire is 'R' ohm. If it i-s melted and stretched to 'n' times its original length , its new resistance will be :

asked Oct 31, 2017 by meena.p

0 answers

A thin prism having refracting angle $10^{\circ}$ is made of glass of refractive index $1.42$ . This prism is combined with another thin prism of glass of refractive index $1.7$. This combination produces dispersion without deviation. The refracting angle of second prism should be :

asked Oct 31, 2017 by meena.p

0 answers

The two nearest harmonics of a tube closed at one end are open at other end are 220 Hz and 260 Hz .What is the fundamental frequency of the system ? end

asked Oct 31, 2017 by meena.p

0 answers

A rope is wound around a linder of mass $3 \;kg$ and radius $40\; cm$. What is the angular acceleration of the cylinder if the rope is pulled with a force of $30\; N$?

asked Oct 31, 2017 by meena.p

0 answers

A beam cf light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. The beam is reflected back as a spot on a scale placed just above the source L. When the mirror is rotated through a small angle $\theta$, the spot of the light is found to move through a distance $y$ on the scale. The angle $\theta$ is given by :

asked Oct 31, 2017 by meena.p

0 answers

Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time $t_1$. On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time $t_2$. The time taken by her to walk up on the moving escalator will be

asked Oct 31, 2017 by meena.p

1 answer

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities $\omega_1$ and $\omega_2$. They are brought into contacl face to face coinciding the axis of rotation. The expression for loss of energy during this process is

asked Oct 31, 2017 by meena.p

0 answers

A long solenoid of diameter $0.1\; m$ has $2 \times 10^{4}$ turns per meter. At the centre of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to -OA from 4A in 0.05s. If the resistance of the coil is $10 \pi^2 \Omega$ the total charge flowing through the coil during this time is :

asked Oct 31, 2017 by meena.p

0 answers

Two Polaroids $P_1$, and $P_2$ are placed with their axis perpendicular to each other. Unpolarised light $I_o$ is incident on $P_1$. A third polaroid $P_3$, is kept in -between $P_1$, and $P_2$, such that its axis makes an angle $45^{\circ}$ with that of $P_1$. The intensity of transmitted Iight through $P_2$, is:

asked Oct 31, 2017 by meena.p

0 answers

Two blocks A and B of masses $3\;m$ and $m$ respectively are connected by a massless and inextensible string. The whole system is suspended by a massless spring as shown in figure. The magnitudes of acceleration of A and B immediately after the string is cut, are respectively :

asked Oct 31, 2017 by meena.p

0 answers

A Spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the po35:r radiated in watt would be

asked Oct 31, 2017 by meena.p

0 answers

Consider a drop of rain water having mass 1 g falling from a height of 1km. It hits the ground with a speed of 50 m/s. Take 'g' constant with a value $10 m/s^2$ . The work done by the (i) gravitational force and the (ii) resistive force of air is:

asked Oct 31, 2017 by meena.p

0 answers

The ratio of resolving powers of an optical microscope for two wavelengths $\lambda_1=4000 A$ and $\lambda_2 =6000 A$ is:

asked Oct 31, 2017 by meena.p

0 answers

The area under uniform acceleration-time graph for a given interval of time gives

asked Oct 29, 2017 by priyanka.c

0 answers

Choose the correct answer

asked Oct 28, 2017 by priyanka.c

1 answer

In how much time does the light of sun reaches the planet earth?

asked Oct 28, 2017 by priyanka.c

1 answer

Choose the renewable sources from the following

asked Oct 28, 2017 by priyanka.c

1 answer

From the following family tree name the missing box

asked Oct 28, 2017 by priyanka.c

1 answer

Which among the following is used for transporting heavier goods for example sack of grains, boxes of blankets, etc.

asked Oct 28, 2017 by priyanka.c

1 answer

They are not closely packed. They do not have any shape. They are also called fluids. They are less rigid. What are they?

asked Oct 28, 2017 by priyanka.c

1 answer

What is the wavelength of sound and light waves?

asked Oct 28, 2017 by priyanka.c

1 answer

Why can we see moon and the star only during the night time?

asked Oct 28, 2017 by priyanka.c

1 answer

Name 1 and 2 in the following figure

asked Oct 28, 2017 by priyanka.c

1 answer

Which of the following type of cloth is used in spring season?

asked Oct 28, 2017 by priyanka.c

1 answer

How many important systems are there in a human body?

asked Oct 28, 2017 by priyanka.c

1 answer

How much percentage of ocean contains fresh water?

asked Oct 28, 2017 by priyanka.c

1 answer

What happens if you lack sunlight?

asked Oct 28, 2017 by priyanka.c

1 answer

What are the things does a first aid box have?

asked Oct 28, 2017 by priyanka.c

1 answer

When an adult human rests,how much volume of air is inhaled or exhaled

asked Oct 28, 2017 by priyanka.c

1 answer

What is good for digestion after eating?

asked Oct 28, 2017 by priyanka.c

1 answer

How old is solar system approximately ?

asked Oct 28, 2017 by priyanka.c

1 answer

Which satellite system helps to connect remote region, vehicles, ships, people and aircraft to other parts of the world and/or other mobile or stationary communications units, in addition to serving as navigation systems.

asked Oct 28, 2017 by priyanka.c

1 answer

Humus has a characteristic black or dark brown colour and is organic due to an accumulation of organic

asked Oct 28, 2017 by priyanka.c

1 answer

What is the disease caused by eating Stale food from the following?

asked Oct 28, 2017 by priyanka.c

1 answer

The movement of air between the environment and the lungs via inhalation and exhalation is called

asked Oct 28, 2017 by priyanka.c

1 answer

Look at the below table and find out which level is rich in vitamins

asked Oct 28, 2017 by priyanka.c

1 answer

In earth's layer crust is composed of what and how much depth does it fall below?

asked Oct 28, 2017 by priyanka.c

1 answer

Heart muscles come under which category?

asked Oct 28, 2017 by priyanka.c

1 answer

What should we do if a person gets a cut on his/her body?

asked Oct 28, 2017 by priyanka.c

1 answer

How should we cross the road if there is no traffic light or zebra-line?

asked Oct 28, 2017 by priyanka.c

1 answer

Which among the following is carbohydrate?

asked Oct 28, 2017 by priyanka.c

1 answer

Which substance support metabolic among the following

asked Oct 28, 2017 by priyanka.c

1 answer

Which part of egg is rich in protein

asked Oct 28, 2017 by priyanka.c

1 answer

Find the missing body part from the following figure

asked Oct 28, 2017 by priyanka.c

1 answer

This creature is mostly found in Australia. It has a Flat, broad tail, brown in colour. The fur in the body is waterproof. It has webbed feet and a large, rubbery duck-like snout. Fine the creature

asked Oct 28, 2017 by priyanka.c

1 answer

What insect category does a butterfly comes?

asked Oct 28, 2017 by priyanka.c

1 answer

Which creature can lay upto 1000 eggs among the following?

asked Oct 28, 2017 by priyanka.c

1 answer

Name the creature. It has long wings and long narrow bill, stubby body, colored throat.

asked Oct 28, 2017 by priyanka.c

1 answer

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