Experiments Questions and Answers

Which of the following will NOT be observed when a multimeter operating in resistance measuring mode probes connected across a component are just reversed 1 Multimeter shows an equal deflection in both cases i e before and after reversing the probes if the chosen component is resistor 2 Multimeter shows NO deflection in both cases i e before and after reversing the probes if the chosen component is capacitor 3 Multimeter shows a deflection accompanied by a splash of light out of connected and NO deflection on reversing the probes if the chosen component is LED 4 Multimeter shows NO deflection in both cases i e before and after reversing the probes if the chosen component is metal wire

In an experiment diameter of wire observation of standard screwgauge is given mm of measurment of The diameter of wire will be A 4 24 0 01 mm Correct Answer B 2 120 01 mm 24 C 5 24 0 01 mm

Experiment that is shown in the following Figure 10 the one that we have used in our 20 b what is the reading of it 30 If the main scale and the vernier scale units are mm answer the following a What is the least count of it 40

15 Two cells of emfs E and E2 E E are connected as shown in figure The ratio a 3 1 E 1 is A le MA When a potentiometer is connected between A and B the balancing length of the potentiometer wire is 300 cm On connecting the same potentiometer between A and C the balancing length is 100 cm 30 E 2 E HH C B E2 HH b 1 3 C n E k 2

1 A student is required to find the maximum permissible percentage error in relative density of an object from the date provided below Weight in air is 10 0 0 1 gf weight in water is 5 0 0 1 gf

The kinetic energy of a particle is the square of the speed of that particle depends If the error in the measurement of speed is 40 then There will be error in the measurement of kinetic energy 2 40 1 80

The main scale reading is 1 mm when there is no object between the jaws In the vernier calipers 9 main scale division matches with 10 vernier scale divisions Assume the edge of the Vernier scale as the 0 of the vernier The thickness using the defected vernier calipers will be of the object 0 mm 1 12 2 mm LUX 2 222 mm 3 12 3 mm 0 mm tu H 10 2011 10 20 aluuti 20 mutu 30 30 40 40 50 50

What will be contents of accumulator after execution of following program CO2 Memory Address in Hex 2050 2053 2054 2055 2058 2059 O ACH O FFH OOOH Instructions MVI A FF XRA A MVI B 53 H SUB B NOP HLT

The length of the compound microscope is 14 cm The magnifying power for relaxed eye is 25 If the focal length of eye lens is 5 cm then the object distance for objective lens will be 1 8 cm O 1 5 cm 2 1 cm 24 cm

A beaker contains 200g of water The heat capacity of the beaker is equal to that of 20g water The initial temperature of water in the beaker is 20 C If 440g of hot wa 92 C is poured in the final temperatu 12 21 glecting radiation loss will be nearly 2 68 C 4 78 C 1 58 C 3 73

replace a lens what is the minimum linear separation in unit of mm that can be resolved on the film which is 3 cm behind the pin hole Answer in mm Your answer Typed answers are easier for students to read than handwritten notes fx

1 under identical conditions are respecti ellee m k ellee 1 27 m 2 THE k A ii i ii iii m k from left to right m ii 27 O m www 4m m k 4k B i i iii ii C i ii ii iii D i i ii i iii 27

A screw gauge has 100 divisions on the circular scale and linear distance travelled by the head scale is 5 mm in 10 complete rota of circular scale When nothing is placed between its studs the zero of circular scale is 26 divisions above the reference line it me zero error is 26 divisions on the circular scale Now if the diameter of a wire is measured by keeping the wire between its studs main scale reading is 6 divisions and 48th division of circular scale coincides with the reference line If the negative zero error of se gauge is x mm and the measured diameter of the wire is y mm of x is

A meter stick is made to oscillate in a vertical plan about a horizontal axis passing through one of it ends for small amplitudes Its time period will b approximately equal to 1 2 sec 3 164 sec 2 1 sec 4 3 26 sec

12 What is meant by roughness O O Minute succession of hills of different height Minute succession of valleys and hills of different height and varied spacing Minute succession of valleys and hills of same height and same gap Minute succession of valleys of different depth 13 Which of the following is used to test leveling of machine bed O Feeler gauge O Slip gauge O Sensitive spirit level O Mandrels

Find the specified domain Find the domain of fg x when f x O 00 00 O 6 U 6 O 6 U 6 0 O 0 5 U 5 0 2 9 x and g x 7x 5

98 A network of six identical capacitors each of value C is made as shown in fig The equivalent capacitance between points A and B is HH a 3C 4 b www HE B

14 At a place horizontal and vertical components of earth s magnetic field are as follows BH 1 G 10 west of north B 1G vertically downward Then dip angle and declination are respectively 1 0 10 W 3 45 10 W 2 45 10 E 4 10 W 45 Le Bu angle angle declini

There is a solid non conducting uniformly charged sphere having radius 18 1 3 x 10 m In figure radial distance v s electric field graph is given then find the total charge in Coulomb on the sphere E 45 R

07 A magnetic flux through a stationary loop with a resistance R varies during the time interval t as at t t Find the amount of heat generated in the loop during that time a c at 2R 2a t 3 3R b d 2 a t 3R at 3R

An object starts from the origin and travel in a straight line Its acceleration versus time graph is shown in the figure What is the maximum interval of time for which the object is moving away from the origin and her fanger 1 en a m s 4 3 Freres for res gefa 2 23 4 5 P 6 7 8 t sec

light propogating in air in at 45 degree on a prism Prism has 4 sides and 4 angles 2 135 angle on top and 2 45 degree in the bottom The ray is acting on the left side Find the angular disperion of the ougoing beam if the prism has refractive inclines n red 1 1 nd n violet 1 2 n air 1

A non conducting circular ring of radius 2 cm is placed in a time varying magnetic field with rate of 0 2 T s If 2C charge placed at its circumference then electric force act on this charge will be 1 4 10 N 2 8 10 N 3 6 10 2 N 4 8 10 2 N

7 In a Meter Bridge null point is found to be 30 cm from end A If now a resistance of 2 is connected in parallel with S the m point occurs at 65 cm value of S is nearly 1 2002 2 28 2 R 8 OG 8 NCERT Pg 12 O K S C

16 A galvanometer coil of resistance 50 shows deflection of 100 A The shunt resistance to be added the galvanometer to work as an ammeter of range 10 is a 52 in parallel c 52 in series b 0 52 in series 0 5 2 in parallel

In a potentiometer experiment the balancing with a cell is at length 240 cm On shunting the cell with a resistance of 20 the balancing length becomes 120 cm The internal resistance of the cell is Question Type Single Correct Type 1 2 3 4 20 40 0 5 Q 10

Vabc2 is determined by measuring a b c d and e separately with the percent d e 3 age error of 2 3 2 1 and 6 respectively Minimum amount of error is contributed by measure ment of 37 A physical quantity P 277 E F G 1 b P Vabc2 d e1 3 2 a a b c d 2 3 2 1 6 G 414 E e 3 d 4 e

8 The value of Young s modulus for a material is 24 101 1 dyn cm 2 What will be the range of the value of its modulus of rigidity WBJEE 2000 8 x 1010 N m 2 to 12 1010 N m

2 3V 4 1 5V If the potential difference across a circuit is V 10 0 1 volt and resistance is measured as R 2 0 04 02 Calculate the value of current flowing in the circuit 1V estions pe 1 5 0 15 amp 3 5 0 3 amp 2 5 0 1 amp 4 5 0 2 amp

The sum of two forces acting at a point is 16 N If the resultant ford is 8 N and its direction is perpendicular to minimum force then th force are 6 N and 10 N 8 N and 8 N 4 N and 12 N 2 N and 14 N X

4 n 1 C In the given circuit what is the maximum value 5 of Rs for zener diode to regulate voltage on load resistance 30V 1 2kQ 2 5 KQ 3 6 k 4 4 k R R 1K2 4 n 1 C BRIS BRI alecal affea afy R faxan tum 30V 1 2 kn 2 5 kn 3 6 k 4 4 k R www R1KQ

Two cells of emfs E and E E E are 3 connected as shown in figure E E A When a potentiometer is connected between A and B the balancing length of the potentiometer wire is 300 cm On connecting the same potentiometer between A and C the balancing E length is 100 cm The ratio is E 1 3 1 2 1 3 3 2 3 4 3 2 fa E a E E E faxigen at A 1 3 1 B Barat faveurt af ungen er 300 m ud 100 cm am E 2 1 3 3 2 3 4 3 2

5 An Oscilloscope is set such that Attenuator Key Voltage Key is at 4V div position and the Time Base Key is at 10 ms div If a signal of maximum voltage Vmax 8V and frequency f 50 Hz Draw the signal displayed on the oscilloscope

Read the following statements w r t taxonomic aids a Monograph contains information of any one taxon b Flora provide information for identification of names of various species found in an area c Manual gives the actual account of habitat and distribution of various animals of a given area d Key contains set of alternate characters of various plants only e Catalogue includes alphabetical arrangement of species of a particular place Select the correct option 1 a b and e 3 a and e only 2 a c and e 4 b c and d

DIRECTIONS Find the probability of an event and identify whether it is experimental or theoretical 1 When a fair dice is rolled once what is the probability of a number less than 7 2 A standard deck of 52 cards consists of 13 black spades 13 black clubs 13 red hearts and 13 red diamonds Each suit has an ace a king a queen a jack and the numbers from 2 to 10 A card is drawn from a well shuffled deck of 52 cards What is the probability of drawing a queen 3 A thumbtack was tossed 50 times It landed point up 35 times and point down 15 times What is the probability that on the next toss it will land point up

A rowboat crosses a river with a velocity of 3 80 mi h at an angle 62 5 north of west relative to the water The river is 0 610 mi wide and carries an eastward current of 1 25 mi h How far upstream is the boat when it reaches the opposite shore

Matter wavelengths of most ordinary objects are unnoticeable because a We are not looking for them Ob They do not actually exist c They are very small d They are very rare

The internal and external diameters measured with the help of Vernier callipers Their values are 4 23 0 02 cm and3 87 0 01cm respectively The thickness of the wall of the cylinder is of a hollow cylinder are

11 A heavy particle hanging from a string of length is projected horizontally with speed gl Find the speed of the particle at the point where the tension in the string equals weight of the particle 1 3gl 2 2gl 3 gl 3 4 gl 2

Two medium of dielectric constant K and K are introduced according to given figure If 3 then calculate ratio of capacity of part A and part K K B and net capacity of system Area of each plate is A

A micrometer has 150 equal divisions on the circular scale and on one full rotation of circular scale main scale advances by 0 02 cm on the main scale The least count of the micrometer in cm is 1 4 x 10 5 2 6 21 x 10 3 3 1 33 10 4 4 1 21 x 10 jons

Keeping all the parameters constant the number of turns in the coil of a moving coil galvanometer is doubled for the sake of increment in its sensitivity Choose the correct alternative 1 Current sensitivity and voltage sensitivity both are doubled 2 Voltage sensitivity is doubled but current sensitivity remains unchanged 3 Current sensitivity is doubled but voltage sensitivity remains unchanged 4 Current sensitivity is doubled but voltage sensitivity is halved

n adjust their buoyancy with an organ called the swim bladder im bladder is a flexible gas filled sac the fish can increase or se the amount of gas in the swim bladder so that it stays y buoyant neither sinking nor floating Suppose the fish is y buoyant at some depth and then goes deeper Part A What would happen to the volume of air in the swim bladder if the fish didn t change the amount of air in it O The volume of air would decrease because of the decreasing pressure O The volume of air would increase because of the increasing pressure O The volume of air would decrease because of the increasing pressure O The volume of air would increase because of the decreasing pressure Submit Part B Request Answer Will the fish need to add or remove gas from the swim bladder to maintain its neutral buoyancy O The fish will need to add gas otherwise the fish will go deeper with decreasing speed O The fish will need to remove gas otherwise the fish will go deeper with decreasing speed O The fish will need to remove gas otherwise the fish will go deeper with increasing speed The fish will need to add gas otherwise the fish will go deeper with increasing speed

in the figures below Circuit symbol of a logic gate and two input waveforms A and B are shown A 5 A B B Name the logic gate Write its boolean expression Write its truth table Give the output wave form

23 A jet aircraft with a mass of 4 475 kg has an engine that exerts a force thrust equal to 59 300 N a What is the jet s acceleration when it takes off Give the magnitude m s b What is the jet s speed after it accelerates for 7 s Assume it starts from rest m s c How far does the jet travel during the 7 s m

m V 5 00 Pan A particle of mass m 3m and moving with velocity of vi undergoes at the origin perfectly inelastic collision with another particle of mass m m moving with velocity 2 v 2j That is particles stick together and the combined system of particles move with after colision What is the ratio of the energy lost to the initial kinetic energy JAKI 52 K 15 Se ti imiz cevatin i aretlendi ini gorene kadar bekleyiniz JAKI 83 K 52 1712 IAN 15 K 52 0 JAKI 40 1

1 3 1 5 A The diagram shows a modified meter bridge is used for measuring two unknown resistances 3 2L AB L AC AD 4 3 resistances R and R are respectively Po the same time when the first Galvanometer is for obtaining the balanced point it is found at C Now the first galvanometer is removed and t 2nd galvanometer is used which gives baland point at D Use the details given in diagram A 5R 4R 3 3 5R 4 R ww 3 L R C R ww D 2 4 R R www 4R 5R 3 3 The value 5R whi B

Negative Marks 1 If wrong option is selected particle moves on a rough horizontal ground with some initial velocity say vo If 3 4 th of its kinetic energy is lost due to friction in time to en coefficient of friction between the particle and the ground is

A sphere of mass m held at a height 2R between a wedge of same mass and a rigid wall is released Assuming that all the surfaces ar frictionless find the speed of the sphere when the sphere hits the ground given R 1 meter and a 37 O 1 m s 2 68 m s O 2 m s O 4 3 m s m 2R Save

The emf of a battery is measured using a potentiometer wire of length 1m and total resistance 2002 The potentiometer wire is connected across a battery of emf 3V and resistance 0 5 22 If the null point occurs at the potentiometer length 40cm find the emf of the first battery Suggest a method of measurement of the internal resistance using the potentiometer