Experiments Questions and Answers

31 For two resestors R and R connected in parallel if R 30 1 and R 60 2 The N percentage error in the measurement of equivalent resistance is 1 3 33 2 33 3

2 A body is simultaneously given two velociti one 12 ms due East and other 5 ms 1 North Find the resultant velocity

A student measured the diameter of a small steel ball using a screw gauge of least count 0 001 cm The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level If screw gauge has a zero error of 0 004 cm the correct diameter of the ball is 1 0 521 cm 3 0 053 cm 2 0 525 cm 4 0 529 cm

One centimeter of main scale of a vernier caliper is divided into 10 equal parts M S R and V C D observed while measuring the length of an object are 3 and 4 respectively Then the length of the object is number of division on vernier scale as 10 mm Take a 4 3 b 3 4 c 3 04 d 4 03

when used to measure the diameter of a wire Main scale reading 0 mm Circular scale reading 52 divisions Given that 1 mm on main scale corresponds to 100 divisions of the circular scale The diameter of wire from the above data is 1 2 3 0 52 cm 0 052 cm 0 026 cm

A funnel is placed upside down on a table as shown in the figure and 600 cm of water is poured into it The area covered by the funnel on the tabletop is 200 cm and the height of the water is 18 cm What is the minimum mass of the funnel in kg if it is not to be lifted away from the supporting surface 200 cm 18 cm

In determination of acceleration due to gravity g using the formula T 2 the errors in g measurement of L and T are 1 and 2 respectively The maximum percentage error in the value of g is 1 5 3 3 2 4 4 1 5

A C the above The electric field intensity in a region is given by E xi yj V m where x y are in meters Then the pattern of line of forces in x y plane is given by B D Electric field at origin is zero

23 A bullet of mass mand velocity is fired onto a stationary block of mass M and sticks to The final velocity would be m m M B M m M C m M m V D m M M V

9 The main scale of a vernier calliper has n divisions cm n divisions of the vernier scale coincide with n 1 divisions of main scale The least count of the vernier calliper is 1 1 n 1 n 1 1 3 2 cm n cm 1 2 cm n 4 n 1 n n 1 C cm n

34 The bulk modulus of a spherical object is B If it is subjected to uniform pressure p the fractional decrease in radius is 1 3 B 3p 3B 2 3p X 4 B

30 In a screw gauge the main scale divisions is 1mm and there are 100 divisions on circular scale What is the least count of the screw gauge 1 1mm 2 0 1mm 3 0 01mm 4 1cm 35 ins

Velocity and acceleration of a particle at some instant are in to onely v 31 4j 2k m s and a 21 1 2k m s a What is the value of dot product of v and a at the given instant b What is the angle between v and a acute obtuse or 90 c At the given instant whether speed of the particle is increasing decreasing or constan

A person decided to walk on an escalator which is moving at constant rate speed When he moves at the rate 1 step sec then he reaches top in 20 steps Next day he goes 2 steps sec and reaches top in 32 steps If speed of escalator is n steps sec Find the value of n

Examine the experimental mole ratio of reactants used in this experiment calculation h In theory this ratio should be exactly 2 1 Furthermore this ratio is not affected by the limiting reactant THEREFORE using AT LEAST THREE complete sentences but more is better explain at least two possible reasons other than human or calculation error why this ratio is not exactly 2 1 based on the experimental data For instance was something lost during the process and if so what Might there have been extra mass gained at some point and if so what could the extra mass be due to Be sure that your explanations make sense for the ratio that actually was obtained 3

Which of the following sets cannot enter into the list of fundamental quantities in any system of units a length mass and velocity b length time and velocity c mass time and velocity d length time and mass noncured and the result is L T c m d 4 A d a c 5 A