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A bakelite capacitor is to be constructed to have a capacitance of 0.04µF and to have a steady workingpotential of 1kVmaximum. Allowing a safe value of field stress of 25MV/m find
(a) the thickness of bakelite needed,
(b) the area of plate needed if the relative permittivity of bakelite is 5,
(c) the maximum energy stored by the capacitor and
(d) the average power developed if this energy is dissipated in a time of 20µs.
Evaluate the speed will the string break A certain string just breaks when it is under400N of tension. A boy uses this string to whirl a 10-kgstone in a horizontal circle of rad
A force of 2.5kN is needed to lift a load. How much work is done if the load is lifted by 500cm? An electromagnet exerts a force of 12N and moves a soft iron armature by a dist
Which of the following material has the highest melting point (A) Copper. (B) Aluminium. (C) Tungsten. (D) Gold. Ans: Tungsten has the highest melting point.
when to identical cells are connected either in series or parallel across a 2 ohm resistor they send the same current through it calculate the internal resistance of each cell?
formula for time period of oscillation of magnet in a vibration magnetometer
Visible Radiation (Waves): Visible waves have a wavelength range among 400 and 700 nanometre.
Variation of temperature of a body according to Newton's law: Let Consider a system has a temperature Φi at time t = 0. It is placed in an environment whose temperature is Φ0. We a
Calculates the total magnetic flux in ring
It is the product of either change in an electric dipole with the distance separating them.
write a note on relative velocity.
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