Physics question and answers for September 16, 2024
- Q M M 18 Calculate the tensions T T and T3 in the three threads shown in the following figure All threads are massless g 10 m s T 137 T...
- Q 18 Shift 1 An active nucleus decays to one third 13 in 20 Hrs The fraction of original activity re maining after 80 Hrs is 1 a b 16 1...
- Q 47 If 0 is angle between the velocity and acceleration of a particle moving on a circular path with decreasing speed then 1 0 90 2 0 0 90 3...
- Q D A certain radioactive element has a half life of 20 years If we have a block with 10 g of the element in it after how many years will...
- Q Two identically charged sphere are suspended by string of equal length The strings make an angle of 30 with each other When suspended in a liquid of density 0 8...
- Q 2 A car moving at 40 km h is to be stopped by applying brakes in the next 4 0 m If the car weighs 2000 kg what average force...
- Q of four identical resistances should be used to draw maximum energy from a cell of voltage V 15 11x 1X4 B 38 www www www www P v RUI Parallel...
- Q A conductor of length 10cm carrying current 1200A Find the magnetic field at a distance 2cm along the axis from its centre
- Q 4 Time period of a simple pendulum of length is T and time period of uniform rod of same length l pivoted about one end and oscillating in a vertical...
- Q A block of mass 10 kg is placed on a long trolley The coefficient of friction between the block and trolley is 0 2 The trolley accelerates from rest with...
- Q An air core parallel plate capacitor has capacitance Co and separation between its plates is do It is given a charge Qo and connected to a bulb of resistance R...
- Q 5 A body is revoluing around sun with closest of 8 x 10 0 m and farthest distance of distance 1 x 10 2 m Time period of the body...
- Q Mark the correct statement s A when a sound wave strikes a wall the compression pulse is reflected as compression pulse B when a sound wave strikes a wall the...
- Q 1 A fix amount of nitrogen gas 1 mole is taken and is subjected to pressure and temperature variation The experiment is performed at high pressure as well as high...
- Q 2 A 100 m long train crosses a man travelling at 5 kmh opposite direction in 7 2 s then the velocity of train is a 40 ms b 25...
- Q If the instantaneous velocity of a particle projected as shown in figure is given by v ai b ct j where a b and c are positive constants the range...
- Q Two coherent plane light waves of equal amplitude makes a small angle a 1 with each other They fall almost normally on a screen If is the wavelength of light...
- Q c 0 tan Three particles A B and C are thrown from the top of a tower with the same speed A is thrown up B is thrown down and...
- Q An electron is projected with a velocity 2 x 105 m s at an angle 30 with a uniform magnetic field of 0 4 T Find radius of curvature of...
- Q There is an isolated planet having mass 2M and radius 2R where M and R are the mass and radius of the earth A simple pendulum having mass m and...
- Q 7 Two blocks are connected to an ideal spring of stiffness 200 N m At a certain and the instantaneous blocks are moving in opposite directions with speeds 4 ms...
- Q Size of a Molecule To measure a very small size like that of a molecule 108 m to 10 10 m we have to adopt special methods We cannot use...
- Q 2 A pair of coils of turns n and n are kept close together Current passing through the first is reducing at rate r and e m f 3 mV...
- Q A lens has a power of 5D in air What will be its power if it is completely immersed in water Given 3 oHg 1 4 2 0H 3 2...
- Q Velocity v of a particle moving along x axis as a function of time is given by v 2t m s Initially the particle is to the right of the...
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