50278 + Interview Questions in Physics

1.	If the following input signal is sent through a PN-junction diode, then the output signal across RL will be
Answer» If the following input signal is sent through a PN-junction diode, then the output signal across R_L will be

Discussion

2.	A mass m is suspended by a massless string forming a simple pendulum of length 2.0 m. The string of the pendulum is initially at an angle of 60° with the vertically downward direction when the mass is released from rest. Centripetal acceleration of the mass m when it is at lowest position, is
Answer» A mass m is suspended by a massless string forming a simple pendulum of length 2.0 m. The string of the pendulum is initially at an angle of 60° with the vertically downward direction when the mass is released from rest. Centripetal acceleration of the mass m when it is at lowest position, is

Discussion

3.	What is Maxwell's electromagnetic radiation theory?
Answer» What is Maxwell's electromagnetic radiation theory?

Discussion

4.	A charged 30 μFcapacitor is connected to a 27 mH inductor. What is the angularfrequency of free oscillations of the circuit?
Answer» A charged 30 μF capacitor is connected to a 27 mH inductor. What is the angular frequency of free oscillations of the circuit?

Discussion

5.	47. Two identical blocks each of mass 3kg placed on a friction less table are pushed by a force of 30N. Calculate - (a) acceleration of the system (b)force on block B by block A (c)force of block B on block A (d)net force on block A
Answer» 47. Two identical blocks each of mass 3kg placed on a friction less table are pushed by a force of 30N. Calculate - (a) acceleration of the system (b)force on block B by block A (c)force of block B on block A (d)net force on block A

Discussion

6.	A particle is moving in a straight line with SHM. Its velocity has the values 3 m/s and 2 m/s when its distances from mean position are 1 m and 2 m respectively. Find the length of its path and period of its motion.
Answer» A particle is moving in a straight line with SHM. Its velocity has the values $3 m / s$ and $2 m / s$ when its distances from mean position are $1 m$ and $2 m$ respectively. Find the length of its path and period of its motion.

Discussion

7.	The minimum sampling frequency of signal [10sinc3(400 t)∗90sinc4(500 t)]2sinc(300 t) to avoid aliasing should be __________Hz.1500
Answer» The minimum sampling frequency of signal $[10 sin c^{3} (400 t) * 90 sin c^{4} (500 t)] 2 sin c (300 t)$ to avoid aliasing should be __________Hz. 1500

Discussion

8.	Question 10Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?
Answer» Question 10 Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?

8.

Question 10Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?

Answer»

Question 10

Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?

Discussion

9.	The first, second and third ionisation energies of Alare 578, 1817 and 2745 kJ mol-1 respectively.Calculate the energy required to convert all the atomsof Al to Al+3 present in 270 mg of Al vapours(1) 5140 kJ(2) 51.40 kJ(3) 2745 kJ(4) 514.0 kJ
Answer» The first, second and third ionisation energies of Alare 578, 1817 and 2745 kJ mol-1 respectively.Calculate the energy required to convert all the atomsof Al to Al+3 present in 270 mg of Al vapours(1) 5140 kJ(2) 51.40 kJ(3) 2745 kJ(4) 514.0 kJ

Discussion

10.	Light of wavelength λ is incident on a slit of width a. The resulting diffraction pattern is observed on a screen at a distance D. The linear width of the principal maximum is equal to the width of the slit, if D equals,
Answer» Light of wavelength $λ$ is incident on a slit of width $a$ . The resulting diffraction pattern is observed on a screen at a distance $D$ . The linear width of the principal maximum is equal to the width of the slit, if $D$ equals,

Discussion

11.	When a soft iron core is introduced in a coil, the strength of the magnetic field:
Answer» When a soft iron core is introduced in a coil, the strength of the magnetic field:

Discussion

12.	A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distance s1 in the first 10 seconds and distance s2 in the next 10 seconds, then
Answer» A particle experiences constant acceleration for $20$ seconds after starting from rest. If it travels a distance $s_{1}$ in the first $10$ seconds and distance $s_{2}$ in the next $10$ seconds, then

Discussion

13.	Calculate the energy of 1mole of photons of radiation whose frequency is 5×10^{4 Hz
Answer» Calculate the energy of 1mole of photons of radiation whose frequency is 5×10^{4 Hz

Discussion

14.	The electric potential V (in volt ) varies with distance x (in meter) according to the relation V=5+4x2. The force experienced by a negative charge of 2 μC located at x=0.5 m is
Answer» The electric potential $V$ (in volt ) varies with distance $x$ (in meter) according to the relation $V = 5 + 4 x^{2}$ . The force experienced by a negative charge of $2 μ C$ located at $x = 0.5 m$ is

Discussion

15.	A force F=−K(y^i+x^j), where K is a positive constant, acts on a particle moving in the x - y plane. Starting from the origin, the particle is taken first along the positive x-axis to the point (a,0) and then parallel to the y-axis to the point (a,a). The total work done by the force F on the particle is
Answer» A force $F = - K (y^i + x^j$ ), where $K$ is a positive constant, acts on a particle moving in the x - y plane. Starting from the origin, the particle is taken first along the positive x-axis to the point $(a, 0)$ and then parallel to the y-axis to the point $(a, a)$ . The total work done by the force $F$ on the particle is

Discussion

16.	A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position
Answer» A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position

Discussion

17.	A black hole is an object whose gravitational fields is so strong that even light cannot escape from it. To what approximate radius would earth (mass =5.98×1024 kg) have to be compressed to be a black hole ?
Answer» A black hole is an object whose gravitational fields is so strong that even light cannot escape from it. To what approximate radius would earth (mass $= 5.98 \times 10^{24} kg$ ) have to be compressed to be a black hole ?

Discussion

18.	In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cm. It can be said that the
Answer» In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cm. It can be said that the

18.

In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cm. It can be said that the

Answer»

In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cm. It can be said that the

Discussion

19.	A system has absorbed 5 kcal of heat and does 200 J of work. The change in internal energy of the system is
Answer» A system has absorbed $5 kcal$ of heat and does $200 J$ of work. The change in internal energy of the system is

Discussion

20.	At a given instant, say t=0, two radioactive substances A and B have equal activities. The ratio RBRA of their activities after time t itself decays with time t as e−3t. If the half-life of A is ln2, the half-life of B is:
Answer» At a given instant, say $t = 0$ , two radioactive substances $A$ and $B$ have equal activities. The ratio $\frac{R_{B}}{R_{A}}$ of their activities after time $t$ itself decays with time $t$ as $e^{- 3 t}$ . If the half-life of $A$ is $ln 2$ , the half-life of $B$ is:

Discussion

21.	A car moving at a speed of 30 kilo meters per hour is brought to a halt in 8 metres by applying brakes. If the same car is moving at 60 km. per hour, it can be brought to a halt with same breaking power in
Answer» A car moving at a speed of 30 kilo meters per hour is brought to a halt in 8 metres by applying brakes. If the same car is moving at 60 km. per hour, it can be brought to a halt with same breaking power in

Discussion

22.	The relationship between phase difference Δϕ and the path difference Δx between two interfering waves is given by (λ = wavelength)
Answer» The relationship between phase difference $Δ ϕ$ and the path difference $Δ x$ between two interfering waves is given by ( $λ$ = wavelength)

Discussion

23.	A satellite close to surface of earth is orbiting in equatorial plane with time period of 1.5 hrs. If it is above a point P on the equator at some time it will be above P again after x hrs. Here x if satellite rotates from west to east is (Answer upto two digits after the decimal point.)
Answer» A satellite close to surface of earth is orbiting in equatorial plane with time period of 1.5 hrs. If it is above a point P on the equator at some time it will be above P again after x hrs. Here x if satellite rotates from west to east is (Answer upto two digits after the decimal point.)

Discussion

24.	32. Find out the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee
Answer» 32. Find out the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee

Discussion

25.	Two forces equal to P and 2P newton act on a particle. If the first be doubled and the second be incresed by 20N ,the direction of the resultant is unaltered. Find the value of P.
Answer» Two forces equal to P and 2P newton act on a particle. If the first be doubled and the second be incresed by 20N ,the direction of the resultant is unaltered. Find the value of P.

Discussion

26.	17.If y represents pressure & x represents velocity gradient dimensions of d2y/dx2 are??
Answer» 17.If y represents pressure & x represents velocity gradient dimensions of d2y/dx2 are??

Discussion

27.	Two charges of 6 μC and 24 μC are placed 12 cm apart. The intensity of the electric field is zero, at a point
Answer» Two charges of 6 $μ C$ and 24 $μ C$ are placed 12 cm apart. The intensity of the electric field is zero, at a point

Discussion

28.	Work done on a liquid drop to increase its radius from 3 cm to 5 cm is π×10−4 J. Find the surface tension of liquid.
Answer» Work done on a liquid drop to increase its radius from $3 cm$ to $5 cm$ is $π \times 10^{- 4} J$ . Find the surface tension of liquid.

Discussion

29.	Write short notes on 1.The Celsius temperature scale2.The Fahrenheit temperature scale3.The Kelvin temperature scale
Answer» Write short notes on 1.The Celsius temperature scale 2.The Fahrenheit temperature scale 3.The Kelvin temperature scale

Discussion

30.	a proton is accelerating in a cyclotron where the applied magnetic field is 2T if the potential gap is effectively 100kv then how much revolutions the proton has to make between the dees to acquire a kinetic energy of 20ev
Answer» a proton is accelerating in a cyclotron where the applied magnetic field is 2T if the potential gap is effectively 100kv then how much revolutions the proton has to make between the dees to acquire a kinetic energy of 20ev

Discussion

31.	A 8-pole, 50 Hz, 3-phase induction motor has blocked rotor reactances per phase equal to 5 times to the rotor resistance per phase. The speed at which maximum torque is developed is _____rpm.600
Answer» A 8-pole, 50 Hz, 3-phase induction motor has blocked rotor reactances per phase equal to 5 times to the rotor resistance per phase. The speed at which maximum torque is developed is _____rpm. 600

Discussion

32.	A sample of gas expands from volume V1 to V2. The amount of work done by the gas is greatest when the expansion is
Answer» A sample of gas expands from volume $V_{1}$ to $V_{2}$ . The amount of work done by the gas is greatest when the expansion is

Discussion

33.	Is internal energy of the adiabatic process is greater than isothermal process?.If so why?
Answer» Is internal energy of the adiabatic process is greater than isothermal process?.If so why?

Discussion

34.	in an LCR circuit , the alternating emf e and current I are given by the equations e= 100 sin (100 t) volt and I= 100 sin (100 t + pi/ 3 )mA . the average power dissipated in the circuit will be(1) 100w(2) 10 w(3) 5 w(4) 2.5 w
Answer» in an LCR circuit , the alternating emf e and current I are given by the equations e= 100 sin (100 t) volt and I= 100 sin (100 t + pi/ 3 )mA . the average power dissipated in the circuit will be (1) 100w (2) 10 w (3) 5 w (4) 2.5 w

Discussion

35.	Two masses M and m are attached to the ends of weightless threads of combined length l. They are set in rotational moton in a horizontal plane about a vertical axis passing through the thread with constant angular velocity ω. If the tensions in the threads are same during motion, the distance of M from the axis is
Answer» Two masses $M$ and $m$ are attached to the ends of weightless threads of combined length $l$ . They are set in rotational moton in a horizontal plane about a vertical axis passing through the thread with constant angular velocity $ω$ . If the tensions in the threads are same during motion, the distance of $M$ from the axis is

Discussion

36.	An alpha particle with kinetic energy T=5.3 MeV initiates a nuclear reaction Be94 + α42 →C126 + n10with energy yield Q=5.7 Mev. The kinetic enrgy of the neutron going at right angles to the direction of motion of the alpha particle will be (in MeV)
Answer» An alpha particle with kinetic energy $T = 5.3 M e V$ initiates a nuclear reaction $B e_{4}^{9} + α_{2}^{4} \to C_{6}^{12} + n_{0}^{1}$ with energy yield $Q = 5.7 M e v$ . The kinetic enrgy of the neutron going at right angles to the direction of motion of the alpha particle will be (in $M e V$ )

Discussion

37.	A parallel-plate capacitor has plate area 25.0 cm2 and a separation of 2.00 mm between the plates. The capacitor is connected to a battery of 12.0 V. (a) Find the charge on the capacitor. (b) The plate separation is decreased to 1.00 mm. Find the extra charge given by the battery to the positive plate.
Answer» A parallel-plate capacitor has plate area $25.0 c m^{2}$ and a separation of 2.00 mm between the plates. The capacitor is connected to a battery of 12.0 V. (a) Find the charge on the capacitor. (b) The plate separation is decreased to 1.00 mm. Find the extra charge given by the battery to the positive plate.

Discussion

38.	The drift velocity in Cu wire if it has 1A current through 2mm2 cross – section is (free electron density is 8.5×1022cm−3
Answer» The drift velocity in Cu wire if it has 1A current through $2 m m^{2}$ cross – section is (free electron density is $8.5 \times 10^{22} c m^{- 3}$

Discussion

39.	A block of mass m falls from height h on a massless spring of stiffness constant k. Find the maximum compression in the spring?
Answer» A block of mass m falls from height h on a massless spring of stiffness constant k. Find the maximum compression in the spring?

Discussion

40.	121.Two copper wires have the same length but the second has diameter twice that of the first. If the resistance of the first is 2 ohms, the resistance of the second is 1) 1/2 ohm 2) 1 ohm 3) 4 ohm 4) 8 ohm
Answer» 121.Two copper wires have the same length but the second has diameter twice that of the first. If the resistance of the first is 2 ohms, the resistance of the second is 1) 1/2 ohm 2) 1 ohm 3) 4 ohm 4) 8 ohm

Discussion

41.

Match the possible values of x mentioned in column II for the equations mentioned in column I Column I Column II (A) x(log5x)2+5log5x+2=58 (p) 1 (B) (x2+6)log3x=(5x)log3x (q) 2 (C) (3+2√2)x2−6x+9+(3−2√2)x2−6x+9=6 (r) 3 (D) log88x2÷(log8x)2=3 (s) 4 (t) 5

Answer» Match the possible values of x mentioned in column II for the equations mentioned in column I

	Column I		Column II
(A)	$x^{(l o g_{5} x)^{2} + 5 l o g_{5} x + 2} = 5^{8}$	(p)	1
(B)	$(x^{2} + 6)^{l o g_{3} x} = (5 x)^{l o g_{3} x}$	(q)	2
(C)	$(3 + 2 \sqrt{2})^{x^{2} - 6 x + 9} + (3 - 2 \sqrt{2})^{x^{2} - 6 x + 9} = 6$	(r)	3
(D)	$l o g_{8} \frac{8}{x^{2}} \div (l o g_{8} x)^{2} = 3$	(s)	4
		(t)	5

Discussion

42.	The ends of a metal rod are kept at temperatures θ1 and θ2 with θ2 > θ1. The rate of flow of heat along the rod is directly proportional to.
Answer» $T h e e n d s o f a m e t a l r o d a r e k e p t a t t e m p e r a t u r e s θ_{1} a n d θ_{2} w i t h θ_{2} > θ_{1} . T h e r a t e o f f l o w o f h e a t a l o n g t h e r o d i s d i r e c t l y p r o p o r t i o n a l t o .$

Discussion

43.	A cylindrical vessel containing a liquid is closed by a smooth piston of mass m as shown in the figure. The area of cross-section of the piston is A. If the atmospheric pressure is Po, find the pressure of the liquid just below the piston.
Answer» A cylindrical vessel containing a liquid is closed by a smooth piston of mass $m$ as shown in the figure. The area of cross-section of the piston is $A$ . If the atmospheric pressure is $P_{o}$ , find the pressure of the liquid just below the piston.

Discussion

44.	A cube of side length a is shown in the figure. At every corner, particles of mass m are present. Find the MOI of system of particles about y−axis.
Answer» A cube of side length $a$ is shown in the figure. At every corner, particles of mass $m$ are present. Find the MOI of system of particles about $y -$ axis.

Discussion

45.	An electric dipole consisting of two equal and opposite point charges (q,m) and dipole length=2l is slightly disturbed from its position of stable equilibrium. The minimum time during which its gets aligned with the electric field.
Answer» An electric dipole consisting of two equal and opposite point charges (q,m) and dipole length=2l is slightly disturbed from its position of stable equilibrium. The minimum time during which its gets aligned with the electric field.

Discussion

46.	One mole of a gas in a cylinder is compressed from 8 m3 to 2 m3 quasi-statically at a constant temperature of 300 K. Workdone during this process is (ln2=0.693)
Answer» One $mole$ of a gas in a cylinder is compressed from $8 m^{3}$ to $2 m^{3}$ quasi-statically at a constant temperature of $300 K$ . Workdone during this process is ( $ln 2 = 0.693$ )

Discussion

47.	A ball of mass m moving with velocity v0 collides a wall as shown in the ﬁgure. After impact it rebounds with a velocity 34v0 . The impulse acting on ball during impact is
Answer» A ball of mass m moving with velocity $v_{0}$ collides a wall as shown in the ﬁgure. After impact it rebounds with a velocity $\frac{3}{4} v_{0}$ . The impulse acting on ball during impact is

Discussion

48.	A man can row a boat at 4 km/h in still water. What is the minimum possible time in which he can cross the river if the speed of the current is 4 km/h and the width of the river is 8 km?
Answer» A man can row a boat at $4 k m / h$ in still water. What is the minimum possible time in which he can cross the river if the speed of the current is $4 k m / h$ and the width of the river is $8 k m$ ?

Discussion

49.	Does a light having high intensity have more number of photons as compared to low intensity light?
Answer» Does a light having high intensity have more number of photons as compared to low intensity light?

Discussion

50.	Write down practical use of trigonomtery.
Answer» Write down practical use of trigonomtery.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

If the following input signal is sent through a PN-junction diode, then the output signal across RL will be

A mass m is suspended by a massless string forming a simple pendulum of length 2.0 m. The string of the pendulum is initially at an angle of 60° with the vertically downward direction when the mass is released from rest. Centripetal acceleration of the mass m when it is at lowest position, is

What is Maxwell's electromagnetic radiation theory?

A charged 30 μFcapacitor is connected to a 27 mH inductor. What is the angularfrequency of free oscillations of the circuit?

47. Two identical blocks each of mass 3kg placed on a friction less table are pushed by a force of 30N. Calculate - (a) acceleration of the system (b)force on block B by block A (c)force of block B on block A (d)net force on block A

A particle is moving in a straight line with SHM. Its velocity has the values 3 m/s and 2 m/s when its distances from mean position are 1 m and 2 m respectively. Find the length of its path and period of its motion.

The minimum sampling frequency of signal [10sinc3(400 t)∗90sinc4(500 t)]2sinc(300 t) to avoid aliasing should be __________Hz.1500

Question 10Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?

The first, second and third ionisation energies of Alare 578, 1817 and 2745 kJ mol-1 respectively.Calculate the energy required to convert all the atomsof Al to Al+3 present in 270 mg of Al vapours(1) 5140 kJ(2) 51.40 kJ(3) 2745 kJ(4) 514.0 kJ

Light of wavelength λ is incident on a slit of width a. The resulting diffraction pattern is observed on a screen at a distance D. The linear width of the principal maximum is equal to the width of the slit, if D equals,

When a soft iron core is introduced in a coil, the strength of the magnetic field:

A particle experiences constant acceleration for 20 seconds after starting from rest. If it travels a distance s1 in the first 10 seconds and distance s2 in the next 10 seconds, then

Calculate the energy of 1mole of photons of radiation whose frequency is 5×10^{4 Hz

The electric potential V (in volt ) varies with distance x (in meter) according to the relation V=5+4x2. The force experienced by a negative charge of 2 μC located at x=0.5 m is

A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position

A black hole is an object whose gravitational fields is so strong that even light cannot escape from it. To what approximate radius would earth (mass =5.98×1024 kg) have to be compressed to be a black hole ?

In the following fig. is shown the flow of liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cm. It can be said that the

A system has absorbed 5 kcal of heat and does 200 J of work. The change in internal energy of the system is

At a given instant, say t=0, two radioactive substances A and B have equal activities. The ratio RBRA of their activities after time t itself decays with time t as e−3t. If the half-life of A is ln2, the half-life of B is:

A car moving at a speed of 30 kilo meters per hour is brought to a halt in 8 metres by applying brakes. If the same car is moving at 60 km. per hour, it can be brought to a halt with same breaking power in

The relationship between phase difference Δϕ and the path difference Δx between two interfering waves is given by (λ = wavelength)

A satellite close to surface of earth is orbiting in equatorial plane with time period of 1.5 hrs. If it is above a point P on the equator at some time it will be above P again after x hrs. Here x if satellite rotates from west to east is (Answer upto two digits after the decimal point.)

32. Find out the frequency of AabbCcDdee if parents are AabbCCddEe and AabbccDdee

Two forces equal to P and 2P newton act on a particle. If the first be doubled and the second be incresed by 20N ,the direction of the resultant is unaltered. Find the value of P.

17.If y represents pressure & x represents velocity gradient dimensions of d2y/dx2 are??

Two charges of 6 μC and 24 μC are placed 12 cm apart. The intensity of the electric field is zero, at a point

Work done on a liquid drop to increase its radius from 3 cm to 5 cm is π×10−4 J. Find the surface tension of liquid.

Write short notes on 1.The Celsius temperature scale2.The Fahrenheit temperature scale3.The Kelvin temperature scale

a proton is accelerating in a cyclotron where the applied magnetic field is 2T if the potential gap is effectively 100kv then how much revolutions the proton has to make between the dees to acquire a kinetic energy of 20ev

A 8-pole, 50 Hz, 3-phase induction motor has blocked rotor reactances per phase equal to 5 times to the rotor resistance per phase. The speed at which maximum torque is developed is _____rpm.600

A sample of gas expands from volume V1 to V2. The amount of work done by the gas is greatest when the expansion is

Is internal energy of the adiabatic process is greater than isothermal process?.If so why?

in an LCR circuit , the alternating emf e and current I are given by the equations e= 100 sin (100 t) volt and I= 100 sin (100 t + pi/ 3 )mA . the average power dissipated in the circuit will be(1) 100w(2) 10 w(3) 5 w(4) 2.5 w

An alpha particle with kinetic energy T=5.3 MeV initiates a nuclear reaction Be94 + α42 →C126 + n10with energy yield Q=5.7 Mev. The kinetic enrgy of the neutron going at right angles to the direction of motion of the alpha particle will be (in MeV)

The drift velocity in Cu wire if it has 1A current through 2mm2 cross – section is (free electron density is 8.5×1022cm−3

A block of mass m falls from height h on a massless spring of stiffness constant k. Find the maximum compression in the spring?

121.Two copper wires have the same length but the second has diameter twice that of the first. If the resistance of the first is 2 ohms, the resistance of the second is 1) 1/2 ohm 2) 1 ohm 3) 4 ohm 4) 8 ohm

Match the possible values of x mentioned in column II for the equations mentioned in column I Column I Column II (A) x(log5x)2+5log5x+2=58 (p) 1 (B) (x2+6)log3x=(5x)log3x (q) 2 (C) (3+2√2)x2−6x+9+(3−2√2)x2−6x+9=6 (r) 3 (D) log88x2÷(log8x)2=3 (s) 4 (t) 5

The ends of a metal rod are kept at temperatures θ1 and θ2 with θ2 &gt; θ1. The rate of flow of heat along the rod is directly proportional to.

A cylindrical vessel containing a liquid is closed by a smooth piston of mass m as shown in the figure. The area of cross-section of the piston is A. If the atmospheric pressure is Po, find the pressure of the liquid just below the piston.

A cube of side length a is shown in the figure. At every corner, particles of mass m are present. Find the MOI of system of particles about y−axis.

An electric dipole consisting of two equal and opposite point charges (q,m) and dipole length=2l is slightly disturbed from its position of stable equilibrium. The minimum time during which its gets aligned with the electric field.

One mole of a gas in a cylinder is compressed from 8 m3 to 2 m3 quasi-statically at a constant temperature of 300 K. Workdone during this process is (ln2=0.693)

A ball of mass m moving with velocity v0 collides a wall as shown in the ﬁgure. After impact it rebounds with a velocity 34v0 . The impulse acting on ball during impact is

A man can row a boat at 4 km/h in still water. What is the minimum possible time in which he can cross the river if the speed of the current is 4 km/h and the width of the river is 8 km?

Does a light having high intensity have more number of photons as compared to low intensity light?

Write down practical use of trigonomtery.

The ends of a metal rod are kept at temperatures θ1 and θ2 with θ2 > θ1. The rate of flow of heat along the rod is directly proportional to.