পানিতে ইউরিয়ার দ্রবণে `100.15^()C` স্ফুটনাঙ্ক থাকে। t এর হিমাঙ্ক বিন্দু গণনা করুন...

An electron moving along the x-axis with an initial energy of 100 eV enters a region of magnetic field vec(B) = (1.5 xx 10^(-3) T) hat (k) at S (see figure). The field extends between x=0 and x=2 cm . The electron is detected at the point Q on a screen placed 8 cm away from the point S . The distance d between P and Q (on the screen) is : (electron's charge = 1.6 xx 10^(-19) C , mass of electron = 9.1 xx 10^(-31) kg ). .

The magnetic field in a plane EM wave is given by B = (100 mu T) sin [(2 x10^(15) s^(–1))(t – x//c)] hat(j) The equation for electric field is

Consider the slabe shown in Figure. Suppose that L = 15.0 cm , A = 105 cm^(2) , and the material is copper. If T_(H) = 125^(@)C, T_(C ) = 10.0^(@)C , and a steady state is reached, find the conduction rate through the slabe.

If mass and specific heat capacity of calormeter is negligible what would be maximum permissible error is S Use the data mentioned below m_(1) rarr 0, S_(c) rarr 0, m_(2) = 1.00kg V = 10.0 V I = 10.0A t = 1.00 xx 10^(2) sec theta_(0) = 15^9@)C Corrected theta_(t) = 65^(@)C (A) 4% (B) 5% (C) 8% (D) 12% .

Answer the following : (a) The triple-point of water is a standard fixed point in modern thermometry. Why ? What is wrong in taking the melting point of ice and the boiling point of water as standard fixed points (as was originally done in the Celsius scale) ? (b) There were two fixed points in the original Celsius scale as mentioned above which were assigned the number 0^(@)C" and "100^(@)C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) scale ? (c ) The absolute temperature (Kelvin scale) T is related to the temperature t_(c) on the Celsius scale by t_(c)=T-273.15 Why do we have 273.15 in this relation, and not 273.16 ? (d) What is the temperature of the triple-point of water on an absolute scale whose unit interval size is equal to that of the Fahrenheit scale ?

When a voltage v_(S)=200sqrt2 sin (omega t+15^(@)) is applied to an AC circuit the current in the circuit is found to be i=2 sin (omegat+pi//4) then average power concumed in the circuit is (A) 200 watt , (B) 400sqrt2 watt , (C ) 100sqrt6 watt , (D) 200sqrt2 watt

A body is projected with an initial speed of 100sqrt3ms^(-1) at an angle of 60^(@) above the horizontal. If g=10ms^(-2) then velocity of the projectile a) is perpendicular to it’s acceleration at the instant t=15 sec . b) Is perpendicular to initial velocity of projection at t=20 sec. c) Is minimum at the highest point d) Changes both in magnitude and direction, during its flight.