ICSE Class 10 Physics Chapter wise Weightage

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Assuming the density of air to be 1.295 kg m-3, find the fall in barometric height in mm of Hg at a height of 107 m above the sea level. Take density of mercury = 13.6 × 10³ kg m-3.

 

The coefficient of cubical expansion of mercury is 0.00018/C and that of brass 0.00006/C. If a barometer having a brass scale were to read 74.5 cm at 30C, Find the true barometer height at 0C. the Scale is supposed to be corrected at 15C.

ANSWER : 74.122 cm

 

The velocity ( v ) of a particle (under a force F) depends on its distance ( x ) from the origin (with x > 0 ) v ∝ 1 √ x . Find how magnitude of the force ( F ) on the particle depends of x .

 

Class 12 | Physics | Capacitance |Find equivalent capacitance between A and B in the combination given below.

 

 

(ii) Q=CV to get the charge

and U=Q^2/2C to get the energy

Class 11 | Elasticity | A uniform rod of mass M and length L is hanging from point P as shown in the figure. Find the elongation in its length due to the self weight of the rod. The Young's modulus of elasticity of the rod is Y and cross-sectional area of the rod is A .

 

Class 12 | Wave optics | In a double slit experiment, green light of 5303 A falls on a double slit having a separation of 19.44 micro meter and width of 4.05 micro meter. the number of bright fringes between the first and second diffraction minima is

 

ANSWER - 5

A potentiometer wire has length 4 m and resistance 8Ω. The resistance that must be connected in series with the wire and an accumulator of e.m.f 2V, so as to get a potential gradient 1 mV per cm on the wire is

 

Class 12 | Physics | Moving Charge | A disc of mass m, radius r and carrying charge q is rotating with angular speed o about an axis passing through its centre and perpendicular to plane, then magnetic moment is​

 

A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shorter possible path in 15 min. The velocity of the river water in km/h is

 

The energy of a system as a function of time t is given as E(t) =A^2 exp(-at), where a=0.2 s^-1. The measurement of A has an error of 1.25%. If the error in the measurement of time is 1.50%, the percentage error in the value of E(t) at t=5 sec is

 

Two bodies A and B of masses 5 kg and 10 kg in contact with each other rest on a table against a rigid wall. The coefficient of friction between the bodies and the table is 0.15. A force of 200 N is applied horizontally to A. What are (a) the reaction of the partition (b) the action-reaction forces between A and B? What happens when the wall is removed? Does the answer to (b) change, when the bodies are in motion? Ignore the difference between μs and μk.

 

Class 12 | Moving Charge and Magnetism | A long insulated copper wire is closely wound as a spiral of 'N' turns. The spiral has inner radius ' a' and outer radius ′ b ′ . The spiral lies in the X−Y plane and a steady current 'I' flows through the wire. The Z-component of the magnetic field at the center of the spiral is :

 

class 11| Gravity | Prove that the path covered by a body projected vertically upward during the last second of its upward motion is equal to the path covered by a freely falling body during the first second of its downward motion.

 

Class 12 | Physics Digital Circuit | The V-I characteristic of a diode is shown in the figure. The ratio of forward to reverse bias resistance is :

 

80 g of water a 30°C are poured on a large block of ice at 0°C. The mass of ice melt is Class 11 Calorimetry Heat

 

In an experiment to measure the height of a bridge by dropping stone into water underneath. If the error in measurement of the time is 0.2 s at the end of 4s, then the error in estimation of height of bridge will be. [AIMS 2018]

 

In the given picture, the capacitor plate are clamped in the labrotary and connected to a battery, length and width of each plate are l and b respectively, the dielectric experience an attractive force due to non uniform electric field between the capacitor plate the edge of the dielectric, calculate the value of weight of the block for which the dielectric will stay in equilibrium. Here all surface are frictionless

 

64 identical spheres of charge q and capacitance C each are combined to form a large sphere. The charge and capacitance of the large sphere is:

 

1ev electron volt

Electron volt is a unit of energy. 

Can also be use as work

Use to measure small energy and work

Defination of 1ev?

1 ev is the amount of kinetic energy gained or lost by a single electron accelerating from rest through an electric potential difference of 1 volt in vaccum. 

Relation between ev and joule:

1 ev = 1 volt x  charge of one Electron = 1volt x 1.602x10^-19 coulombs

So, 1 ev = 1.602 x 10^-19 joule

The numerical value of 1 ev in joule is equivalent to the numerical value of the charge of an electron in coulomb's. 

Similarly, 1 joule = 6.242 x 10^18 ev

Some bigger unit is Mev

1Mev = 10^6 ev