Basic Physics Questions and Answers

An object weighs m in liquid of density p and that in a liquid of density P2 weighs m2 The density of object is M P2 M P1 m m M P2 M P1 m m M P2 M P1 M M M P2 M P1 m m

In a potentiometer arrangement of a cell of emf 2 V gives a balance at 40 cm length of wire Now when the cell is replaced by another cell the balance point shift to 60 cm The emf of the second cell will be 22 O 1V O 3 V O 2V O 4 V

A dip circle is oriented with its piane at an angle o 30 with the magnetic meridian at a place The apparent angle of dip shown by the dip circle is 45 The true angle of dip at the place will be 1 tan 1 3 2 3 tan 4 2 tan 2 4 tan 19 2

19 A cylinder is pure rolling up an incline plane It stops momentarily and then rolls back The force of friction 1 on the cylinder is zero throughout the journey 2 is directed opposite to the velocity of the centre of mass throughout the journey 3 is directed up the plane throughout the journey 4 is directed down the plane throughout the iourney

resistance as seen at ab are respectively W 10S2 wwa 552 O10v 102 V Select one a 5V 10 ohm O b 54V 15 ohm O c 10V 10 ohm d 10V 15 ohm 16 10 AKADR ob

A sinusoidal voltage is represented as v 141 4sin 314 18t 2 Its rms value of voltage and frequency respectively Select one O a 141 42V 314 16Hz O b 100V 100Hz O c 87 92V 56Hz O d 200V 50Hz

optio 1 Which of the following is not a fundamental quantity a Current c Weight 2 A physical balance is used for the measurement of a length c area 3 1 micron is equal to a 10 c 10 6 4 Vernier calliper is used to measure a mass c area 5 Doctor s thermometer is another name for a clinical thermometer c maximum minimum thermometer 6 A kink is present in a clinical thermometer c both a and b metres b Time d Length b d mass volume b 10 d 106 b length d none of these b laboratory thermomete d none of these b laboratory thermometer d none of these

resistance 2r is also connected in series with the capacitor The amount of heat liberated ins of capacitance C is charged by a battery of emf E and internal resistance the battery by the time capacitor is 50 charged is 3 a E C 8 E C E C b c 6 12 For the circuit shown in the figure determine the charge on canggit d E C 24

Example 14 In the adjacent figure angle 9 of the inclined plane is adjustable A block is kept on the incline and 9 is increased slowly from 0 and it is observed that block starts sliding down the incline when 9 is just greater than 37 The coefficient of static friction is A 0 5 B C 0 6 0 75 D 1 2 8 5 kg

In an R C series circuit Xc R then the phase angle between the applied voltage and circuit current is Select one a 90 degree b 30 degree c 45 degree d 36 degree

In the diagram shown the charge Q is fixed Another charge 2q and mass m is projected from a distance R from the fixed charge Minimum separation between the two charges if the 1 times of the projected velocity at this moment is Assume gravity to be velocity becomes 3 1957 R b R Q V R 30 c R 2q

answered If in an RLC series circuit the frequency is below out of 2 00 resonant frequency g question estion 2 Select one O a Xc XL O b XC XL Oc None of the options O d Xc XL

A black spot is present at the centre of the face of an equilateral prism A man places his eye directly at the opposite corner He sees two images of the spot at an angular separation of 60 Then the condition on the refractive index of the prism is Black spot Answer Rate this question

Charge through a cross section of a conductor is given by Q 3 2 C where tis time in second The average current through the conductor in the interval t 1 s to t 3 s will be O 6 A O 8 A O 16 A O 12 A

2 The electric field on two sides of a thin sheet of charge is shown in the figure The charge density on the sheet is On E 8V m E 12V m

What is the change in Gibb s free energy during isothermal expansion of 1 mole of ideal gas from a pressure of 10 atm to a pressure of 1 atm at a temperature of 25 C Select one a 2980 cal b 250 cal c 686 3 cal d 10 cal

13 A current carrying power line carries current fro east to west The direction of magnetic field short distance vertically below it is 1 North to South 2 South to North 4 West to East 3 East to West

09 The input link O P of a four bar linkage rotated at 2 rad s counter clockwise directic as shown below The angular velocity the coupler PQ in rad s at an instant whe 200 P 180 is 0 a 4 c 1 O GATE 07 PQ 0 Q 2a O P 0 0 a b 2 2 0 1 2

Match the columns Column A 1 Length 2 10 C to 110 C 3 Mass 4 Time 5 Measuring human body temperature Column B a Pendulum b Tonne c Clinical thermometer d Laboratory thermometer e Screw gauge

View in A wire of resistance xohm is drawn out so that its length is increased to three times its original length and its new resistance becomes 36 Q then x will b 080 060 O 40 20

A body of mass 10 kg is kept on horizontal floor of coefficient of static friction s 0 5 and coefficient of kinetic friction k 0 45 as shown The contact force on the body when applied force is 40 N is g 9 8 m s 10 F 125 N 106 N Read More 98 N

93 How many redox equivalents will be removed from PGAL and transferred to a molecule of NAD if two molecules of glucose enter the glycolysis 1 2 3 8 2 4 4 6 Jupplysis Substrat

Q8 Assume that a neutron breaks into a proton and an electron The energy released during this process is Mass of neutron 1 6725 x 10 27 kg Mass of proton 1 6725 x 10 27 kg Mass of electron 9 10 1 kg

148 In a double slit experiment the two slits are 1 mm apart and the screen is placed 1 m away A monochromatic light wavelength 500 nm is used What will be the width of each slit for obtaining ten maxima of double slit within the central maxima of single slit pattern 2015 a 0 1 mm b 0 5 mm of c 0 02 mm d 0 2 mm

This section contains 35 SINGLE CORREC TYPE questions Each question has 4 Read More A block of mass 16 kg is released from top of a smooth inclined plane as show n figure The block comes to rest after compressing the spring by 1 m If spring constant of the spring is 200 N m what is distance travelled by block before coming to rest g 10 m s M 6 m 2 5 m 5 m Immy 30

O An auditorium has reverberation time of 2 second The total absorption area in the hall is 4980 m 2 the coefficient of absorption is 0 15 What is volume of the hall 9000 m 3 900 m 3 9000 cm 3 9000000 cm 3

52 In a diffraction pattern due to a single slit of width a the first minimum is observed at an angle 30 when light of wavelength 5000 is incident on the slit The first secondary maximum is observed at an angle of 2016 a c sin 4 1 sin b sin d sin 2 3 3 4

A vertical dam on a large lake is 30 ft tall and 60 ft wide and the water level is 3 ft below the top of the dam In the middle of the dam at the very bottom is a gate in the shape of an isosceles triangle 10 ft on a side as shown in the figure below Assume a density of water p 62 4 lb ft3 27 ft 10 ft Find the hydrostatic force in lb on the gate Round your answer to the nearest integer A vertical dam on a large lake is 30 ft tall and 60ft wide and the water level is 3 ft below the top of the dam In the middle of the dam at the very bottom is a gate in the shape of an isosceles triangle 10 ft on a side as shown in the figure below Assume a density of water 62 4 1 10 ft 27 11 Find the hydrostatic force in on the gate Round your answer to the nearest integer 296700

51 Two slits in Young s experiment have widths in the ratio 1 25 The ratio of intensity at the maxima Imax is and minima in the interference pattern min 2015 RS a c 121 49 419 b d 49 121 014 9 15 NCER

2 In a Fresnel biprism experiment the two positions of lens give separation between the slits as 16 cm and 9 cm respectively What is the actual distance of separation 1996 a 12 5 cm c 13 cm b 12 cm d 14 cm

A capacitor of capacitance 2 F is charged to a potential difference of 5 V Now the charging battery is disconnected and the capacitor is connected in parallel to a resistor of 5 2 and another unknown resistor of resistance Ras shown in figure If the total heat produced in 52 resistance is 10 ul then the unknown resistance R is equal to a 10 22 b 15 Q 10 c 2 3 d 7 5 2uF

149 For a parallel beam of monochromatic light of wavelength A diffraction is produced by a single slit whose width a is of the wavelength of the light If D is the distance of the screen from the slit the width of the central maxima will be 2015 a c D a 2Da b d Da a 2D a

ERT T P is not Which of the following phenomenon common to sound and light waves 1988 a Interference c Coherence b Diffraction d Polarisation 19891

150 At the first minimum adjacent to the central maximum of a single slit diffraction pattern the phase difference between the Huygen s wavelet from the edge of the slit and the wavelet from the midpoint of the slit is 2015 RS

A hollow conducting sphere is placed in an electric field produced by a point charge placed at point A as shown in the figure Let VB and Vc be the electrostatic potential at points B and C respectively then A B VB Vc VB Vc VB Vc C

29 Two points P and Q are maintained at potential of 8 V and 7 V respectively The work done in moving 105 electrons from P to Q is 1 2 4 x 10 13 J 3 1 6 x 10 13 J 2 1 6 10 13 J 4 2 4 10 13 J

There are two metallic spheres of same radii but one is solid and other is hollow Then 1 Solid sphere can be given more charge 2 Hollow sphere can be given more charge 3 Both can be given equal amount of maximum charge 4 Any amount of charge can be given to both

Ratio of intensities of two waves are given by 4 1 Then the ratio of the amplitudes of the two waves is 1991 a 2 1 c 4 1 124 b 1 2 d 1 4 ment carried out with

109 Statement A A tree showing seasonal activity shows typical S shaped curve Statement B in determining Gravity does not play any kind of role plant growth Read above statements and choose the correct option 1 Only statement A is correct 2 Only statement B is correct 3 Both statements are correct

20 Five cells each of internal resistance 0 22 and e m f 2 V are connected in series with a resistance 402 The current through the external resistance is a 0 2 A b 00 5 A c 1 A d 2 A O O O a O b C d

Choose the correct alternative A x x is a positive integer and x 64 0 B y y is a natural number which divides 42 C z z is a two digit natural number such that the sum of its digits is 7 D w w is the sum of any three factors of 12 Find n A n B n C n D O 8 9 O 173 12 O 4 3 O None of these

A Equal wavelengths have equal linear momenta B Equal energies have equal linear momenta C Equal linear momenta have equal wavelengths D Equal frequencies have equal linea momenta

The fundamental frequency of a string stretched with a weight of 4 kg wt is 25 Hz The weight required to produce its octave is Neglect change in linear mas density O 4 kg wt O 12 kg wt Read More O 16 kg wt

139 If the pressure of hydrogen gas is increased 14 from 1atm to 100 atm keeping the hydrogen ion concentration constant at 1M the voltage of the hydrogen half cell is at 25 C will be A 0 059 V C 0 295 V B 0 059 V D 0 118V

119 The activity of a radioactive sample is measured as 1850 counts per minute at t 0 and as 185 counts per minute at t 10 minute The decay constant is approximately A 0 230 per minute B 0 461 per minute C 0 691 per minute D 0 922 per minute

In an ammeter 10 of the main current is passing through galvanometer if the galvanometer is shunted with a 102 resistance The resistance of the galvanometer is 1 2012 2 5022 3 90 2 4 100 OD abwoon

A parallel plate capacitor have plate area A and plate separation d is charged by a battery of voltage V The battery is then disconnected The work needed to pul the plates to separation 2d is O AV d 2AV 0 d Read More O AV 0 2d

A particle having charge q and mass m is projecte with velocity v 27 31 in uniform electric fiel E E Magnitude of change in momentur during time interval tis 1 13mt Eo 2 qEot m

Question 3 A block of mass 3m is suspended by a meter scale rod of mass m as shown in figure If the tension in string A is equal to kmg in equilibrium then value of k will be A 25 50 1 2 3 4 54 5 315 n 75 100 cm 3m

b If the clock is started at 12 00 noon what will it read after a time of 21 8 h has elapsed on Earth Enter the time to the nearest minute Enter a number the clock run on the Moon X Knowing that the clock is designed to advance by 1 0 s for every oscillation and knowing the actual time elapse for one oscillation how can we determine the total time elapse and the reading on the clock PM