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Why does the exact balance of power between central and state governments vary from one generation to another ? Explain with two examples

Answer: The exact balance of power between the central and the state government varies from one federation to another. This balance of... View Article

State whether the following statement is true or false. ‘The demand for a commodity always increases with increase in the prices of other goods’

Answer: The given statement is false. If the price of a complementary good increases, the demand for the commodity will fall. The demand... View Article

Improvement in the health status of the population has been the priority of a country. Give reasons.

Answer: A country like Japan does not have abundant natural resources, yet, Japan is one of the most developed and advanced countries in the... View Article

Provide a suitable classification for resources on the basis of ownership. Mention the main features of any three types of such resources.

Answer: On the basis of ownership resources can be classified into 4 different types which are listed below: International resources National... View Article

“Employment structure is characterized by self-employment in the primary sector.” Explain the statement

Answer: Here the example of the primary sector is the agriculture sector. The most labour absorbing sector of the economy is the Agriculture... View Article

Pick the wrong answer in the context with rainbow:

1. Rainbow is a combined effect of dispersion, refraction, and reflection of sunlight. 2. The order of colours is reversed in the secondary... View Article

If a current is passed through a spring then spring will:(a) Remains same (b) Expand (c) Compress (d) None of the options

Answer: (c) Compress The spring will compress due to the force of attraction between two adjacent coils carrying current in the same... View Article

A 100 volt AC source of frequency 500 hertz is connected to a LCR circuit with L = 8.1 millihenry, C = 12.5 microfarad and R = 10 ohm, all connected in series. The potential difference across the resistance will be:

Solution: Impedance of series RLC circuit is given by:... View Article

Which energy of water is used to produce hydroelectricity?

a) Kinetic energy b) Potential energy c) Both a and b d) None of the options Solution: c) Both a and b... View Article

Electromagnetic wave of intensity 1400 W/m^2 falls on a metal surface on area 1.5 m^2 is completely absorbed by it. Find the force exerted by the beam.

Solution: For a perfectly absorbing surface, F=IA/C... View Article

In a semiconductor diode, barrier potential offers opposition to only————–.

Solution: A depletion layer is formed across the junction of a semiconductor diode. Barrier potential offers opposition to only majority carriers... View Article

A block of mass m is attached with a massless spring of force constant k. The block is placed over a rough inclined surface for which the coefficient of friction is μ=3/4. The minimum value of M required to move the block up the plane is (Neglect mass of string and pulley and friction in pulley).

Solution: Let mass M descends x meter to lift the load then kx = mgsinθ + μmgcosθ kx=6m+6m kx=12m Now, applying work energy... View Article

Electromagnetic wave travels in medium with speed of 2×10^8m/s. The relative permeability of the medium is 1. Find the relative permittivity of the medium.

Solution: Speed of the electromagnetic wave in a medium is given by =2.25... View Article

Fission of nuclei is possible because the binding energy per nucleon in them:

a) Decreases with mass number at high mass numbers b) Increases with mass number at high mass numbers c) Decreases with mass number at low mass... View Article

Young’s double slit experiment is first performed in air and then in a medium other than air. It is found that the 8th bright fringe in the medium lies where the 5th dark fringe lies in the air. The refractive index of the medium is nearly:

Solutions:... View Article

The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux linked with the primary coil is given by ϕ=ϕ0+4t, where ϕ is in webers, t is time in seconds and ϕ0 is a constant, the output voltage across the secondary coil is:

Solution:... View Article

A current of 2A is increasing at a rate of 4A/s through a coil of inductance 2H. What is the energy stored in the inductor per unit time?

Solution: Potential difference across coil is V=2*4=8V Energy stored per unit time is given by P=Vi =8*2 = 16 J/s... View Article

Two identical capacitors each of capacitance 5μF are charged to potential 2 KV and 1 KV respectively. There negative ends are connected together, when the positive ends are also connected together, the loss of the energy of the system is

Solution:... View Article

A capillary tube of glass is taken from the Earth’s surface to the surface of the Moon. The rise of the water column on the Moon (given contact angle between glass and water is =0 degree and acceleration due to gravity on the Earth is 6 times that of the Moon) is:

Solution: Six times that on the Earth’s surface.... View Article

A square wave current switching rapidly between +0.5 amperes and -0.5 amperes is passed through an AC ammeter. The reading shown by ammeter is ——————-

Solution:... View Article

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