2 10 6 V m 4 2 10 4 V m 14 An earth s satellite is revolving
Last updated: 6/13/2023
2 10 6 V m 4 2 10 4 V m 14 An earth s satellite is revolving in circular orbit in equatorial plane It is used for communication purpose The satellite can transmit signals upto 60 latitude on earth The angular velocity of satellite is 1 1 2 x 10 5 V m 3 10 V m GM 2R GM 15 A battery of emf 40V and internal resistance 202 is connected to a bulb of resistor 1892 What is the efficiency of the battery E 40 V 20 H for 1 A B 3GM 4R R 180 3GM BR dr 1 x dt 2 x0 1 10 3 7 5 16 A satellite is revolving round the earth in circular orbit with speed v An object of mass m is ejected from the satellite such that the object just escapes from earth s gravitational field At the time of ejection kinetic energy of the object was 1 mv 2 m 2 45 4 90 3 2m 4 mv 17 Linear momentum of a particle as function of time f is given by P Asin Bti Acos Ct A B C are constant Force acting on the particle is perpendicular to the momentum vector at any time t 2 B C 4 C AB 3 A C 18 A particle with position vector is moving in a circle about origin with angular velocity angular acceleration at which of the following relations is correct 19 Medical le 3 Change in angular momentum Angular impulse 4 Both 1 and 2 are correct In the given arrangement the charge on the 3 F capacitor is 23 24 2 F 1 10 C 2 20 C 3 30 C 4 25 C 20 A particle is moving with velocity equal to 0 4 m s is subjected to a constant acceleration of 0 15 m s for 2s in a direction perpendicular to initial direction of motion The magnitude of final resultant velocity is 1 0 3 m s 3 0 5 m s 10V 1 3P V TS 0 2 PV TS 0 21 Two soap bubble coalesce to form one bubble If decreases in volume and surface area are V and S respectively Atmospheric pressure is P and surface tension is T then correct relation is 3 3 F 3 3P V 4TS 0 4 None of these 22 Two tuning fork when sounded together gives 4 beats per second Frequency of fork A is 248 Hz Now tuning fork Bis waxed due to which beat frequency is increased to 7 beats per second Find the original frequency of B 2 252 Hz 1 244 Hz 3 241 Hz 4 255 Hz For a heat engine the temperature of the source is 127 C To have 60 efficiency the temperature of the sink is 1 160 C 1 F 2 0 6 m s 4 0 7 m s A All N 2 200 C 3 113 C 4 113 C If v is the velocity of an electron in first excited state of H atom and fis the frequency of revolution then the de Broglie wavelength of the electron will be