50278 + Interview Questions in Physics

1.	41. Why in isothermal process Q is not 0 ? Q=nCΔ T \backslashΔ T=0 Then,why Q is not 0.
Answer» 41. Why in isothermal process Q is not 0 ? Q=nCΔ T \backslashΔ T=0 Then,why Q is not 0.

Discussion

2.	The temperature coefficient of resistance of a conductor varies as α(T)=3T2+2T. If R0 is resistance at T=0 and R is resistance at T, then
Answer» The temperature coefficient of resistance of a conductor varies as $α (T) = 3 T^{2} + 2 T$ . If $R_{0}$ is resistance at $T = 0$ and $R$ is resistance at $T$ , then

Discussion

3.	Acceleration of the particle in a rectilinear motion is given as a=3t2−2t+5 in (m/s2). The velocity of the particle as a function of time t is (Given, at t=0,u=−4 m/s)
Answer» Acceleration of the particle in a rectilinear motion is given as $a = 3 t^{2} - 2 t + 5$ in $(m / s^{2})$ . The velocity of the particle as a function of time $t$ is (Given, at $t = 0, u = - 4 m / s$ )

Discussion

4.	A particle moves with a constant speed v along a parabolic path y=kx²,where k is a positive constant. Find the acceleration of the particle at the point x=0
Answer» A particle moves with a constant speed v along a parabolic path y=kx²,where k is a positive constant. Find the acceleration of the particle at the point x=0

Discussion

5.	87.Linear mass density varies as L=kx .The moment of inertia is maximum for
Answer» 87.Linear mass density varies as L=kx .The moment of inertia is maximum for

Discussion

6.	The excess pressure inside a soap bubble is twice the excess pressure inside a second soap bubble. The volume of the first bubble is n times the volume of the second where n is
Answer» The excess pressure inside a soap bubble is twice the excess pressure inside a second soap bubble. The volume of the first bubble is n times the volume of the second where n is

Discussion

7.	Two slabs each of area A, length 2 m and 4 m, thermal conductivities k1=300 W/m∘C and k2=200 W/m∘C respectively are joined to form a single slab of length 6 m. Find the equivalent thermal conductivity of resultant slab. (in W/m∘C)
Answer» Two slabs each of area $A$ , length $2 m$ and $4 m$ , thermal conductivities $k_{1} = 300 {W/m}^{\circ} C$ and $k_{2} = 200 {W/m}^{\circ} C$ respectively are joined to form a single slab of length $6 m$ . Find the equivalent thermal conductivity of resultant slab. (in ${W/m}^{\circ} C$ )

Discussion

8.	The figure shows two positions A and B at the same height h above the ground. If the maximum height of the projectile is H, then determine the time t elapsed between the positions A and B in terms of H.
Answer» The figure shows two positions A and B at the same height h above the ground. If the maximum height of the projectile is $H$ , then determine the time t elapsed between the positions A and B in terms of $H$ .

8.

The figure shows two positions A and B at the same height h above the ground. If the maximum height of the projectile is H, then determine the time t elapsed between the positions A and B in terms of H.

Answer»

The figure shows two positions A and B at the same height h above the ground. If the maximum height of the projectile is $H$ , then determine the time t elapsed between the positions A and B in terms of $H$ .

Discussion

9.	A simple pendulum is set up in a trolley which moves to the right with an acceleration a on a horizontal plane. Then the thread of the pendulum in the mean position makes an angle θ with the vertical
Answer» A simple pendulum is set up in a trolley which moves to the right with an acceleration a on a horizontal plane. Then the thread of the pendulum in the mean position makes an angle θ with the vertical

9.

A simple pendulum is set up in a trolley which moves to the right with an acceleration a on a horizontal plane. Then the thread of the pendulum in the mean position makes an angle θ with the vertical

Answer»

A simple pendulum is set up in a trolley which moves to the right with an acceleration a on a horizontal plane. Then the thread of the pendulum in the mean position makes an angle θ with the vertical

Discussion

10.	If 10% of the electrical energy supplied to an incandescent light is radiated as visible light, the number of photons emitted by a 60 W bulb per second is 1.8×109.5k. The value of k is(Integer only) (λ=6000 ˙A)
Answer» If $10 %$ of the electrical energy supplied to an incandescent light is radiated as visible light, the number of photons emitted by a $60 W$ bulb per second is $1.8 \times 10^{9.5 k}$ . The value of $k$ is(Integer only) $(λ = 6000 ˙ A)$

Discussion

11.	141. A man is walking 5 steps forward & 3steps backward.Each step is 1m long and takes 1s.There is a pit 11m away from starting point.Then man will fall into the pit when
Answer» 141. A man is walking 5 steps forward & 3steps backward.Each step is 1m long and takes 1s.There is a pit 11m away from starting point.Then man will fall into the pit when

Discussion

12.	Find RAB (Call resistances in Ω )
Answer» Find $R_{A B}$ (Call resistances in $Ω$ )

Discussion

13.	In Fourier's law what does the negative sign indicate?
Answer» In Fourier's law what does the negative sign indicate?

Discussion

14.	18. In which of the following pressure condition for 11.2 litre of oxygen at 300 Kelvin temperature maximum number of moles are possible: a) 0.5 ATM. b)760 mmhg. c)7.6cmhg. d)7.6 mmhg.
Answer» 18. In which of the following pressure condition for 11.2 litre of oxygen at 300 Kelvin temperature maximum number of moles are possible: a) 0.5 ATM. b)760 mmhg. c)7.6cmhg. d)7.6 mmhg.

Discussion

15.	Choose the correct alternative: (a) Alloys of metals usually have (greater/less) resistivity than thatof their constituent metals. (b) Alloys usually have much (lower/higher) temperaturecoefficients of resistance than pure metals. (c) The resistivity of the alloy manganin is nearly independent of/increases rapidly with increase of temperature. (d) The resistivity of a typical insulator (e.g., amber) is greater thanthat of a metal by a factor of the order of (1022/1023).
Answer» Choose the correct alternative: (a) Alloys of metals usually have (greater/less) resistivity than thatof their constituent metals. (b) Alloys usually have much (lower/higher) temperaturecoefficients of resistance than pure metals. (c) The resistivity of the alloy manganin is nearly independent of/increases rapidly with increase of temperature. (d) The resistivity of a typical insulator (e.g., amber) is greater thanthat of a metal by a factor of the order of (1022/1023).

Discussion

16.	The value of 2π∫0xsin8xsin8x+cos8xdx is equal to
Answer» The value of $2 π \int 0 \frac{x {sin}^{8} x}{{sin}^{8} x + {cos}^{8} x} d x$ is equal to

Discussion

17.	A uniform sphere of mass M and radius R exerts a force F on a small mass m situated at a distance of 2R from the centre O of the sphere. A spherical portion of diameter R is cut from the sphere as shown in the figure. The force of attraction between the remaining part of the sphere and the mass m will be
Answer» A uniform sphere of mass M and radius R exerts a force F on a small mass m situated at a distance of 2R from the centre O of the sphere. A spherical portion of diameter R is cut from the sphere as shown in the figure. The force of attraction between the remaining part of the sphere and the mass m will be

Discussion

18.	87.The capacitances of. Three capacitors are in the ratio of 1:2:3 the difference in the equivalent capacitance for their series and parallel combination .is 6 mue F . what are the capacitance of the capacitors?
Answer» 87.The capacitances of. Three capacitors are in the ratio of 1:2:3 the difference in the equivalent capacitance for their series and parallel combination .is 6 mue F . what are the capacitance of the capacitors?

Discussion

19.	Magnetic intensity due to magnitization is magnetic intensity H or intensity of magnetization I?
Answer» Magnetic intensity due to magnitization is magnetic intensity H or intensity of magnetization I?

Discussion

20.	A simple pendulum is oscillating in a vertical plane. If resultant acceleration of bob of mass m at a point A is in horizontal direction, find the tangential force at this point in terms of tension (T) and weight of pendulum (mg).
Answer» A simple pendulum is oscillating in a vertical plane. If resultant acceleration of bob of mass $m$ at a point $A$ is in horizontal direction, find the tangential force at this point in terms of tension $(T)$ and weight of pendulum $(m g)$ .

Discussion

21.	A mass M attached to a horizontal spring with amplitude A1 when the mass M passes through through its mean position then a smaller mass m is placed over it and both of them move together with amplitude A2. The ratio of A1/A2 is ?
Answer» A mass M attached to a horizontal spring with amplitude A1 when the mass M passes through through its mean position then a smaller mass m is placed over it and both of them move together with amplitude A2. The ratio of A1/A2 is ?

Discussion

22.	25.A car and a truck have kinetic energy. If equal retarding force is used to stop them then which will travel more distance ?
Answer» 25.A car and a truck have kinetic energy. If equal retarding force is used to stop them then which will travel more distance ?

Discussion

23.	A rectangular film of liquid is extended from (4×2 cm) to (5×4cm) . If the work done is 0.0003J the value of surface tension is? How to calculate the no. Of sides of rectangle exposed?
Answer» A rectangular film of liquid is extended from (4×2 cm) to (5×4cm) . If the work done is 0.0003J the value of surface tension is? How to calculate the no. Of sides of rectangle exposed?

Discussion

24.	The maximum horizontal thrust induced at the supports due to train of two point loads (30kN,20kN, 3m) apart crossing the three hinged arch(as shown in figure) is__________55
Answer» $The maximum horizontal thrust induced at the supports due to train of two point loads (30 k N, 20 k N, 3 m)$ $apart crossing the three hinged arch(as shown in figure) is$ __________ 55

Discussion

25.	if a particle startiing velocity u and axclaration a=At3 given us,there A cons†an t and t time,then its last velocity given by that 1. u+at4 2. u+at4/4 3. u+at3 4. u+At3/
Answer» if a particle startiing velocity u and axclaration a=At3 given us,there A cons†an t and t time,then its last velocity given by that 1. u+at4 2. u+at4/4 3. u+at3 4. u+At3/

Discussion

26.	An Iron rod and a copper rod lie side by side. As the temperature is changed, the difference in the lengths of the rods remains constant at a value of 10 cm. Find the lengths at 0∘C. Coefficients of linear expansion of iron and copper are 1.1 × 10−6/∘C and 1.7 × 10−5/∘C respectively.
Answer» An Iron rod and a copper rod lie side by side. As the temperature is changed, the difference in the lengths of the rods remains constant at a value of 10 cm. Find the lengths at $0^{\circ} C$ . Coefficients of linear expansion of iron and copper are $1.1 \times 10^{- 6} /^{\circ} C$ and $1.7 \times 10^{- 5} /^{\circ} C$ respectively.

Discussion

27.	In the figure shown below, a horizontal force F is applied on 6 kg block towards left. If the coefficients of friction between the surfaces are 0.3 and 0.4 as shown in the figure. then the value of tension in the rope and force required just to slide the 6 kg block under the 3 kg block is (Take g=10 m/s2)
Answer» In the figure shown below, a horizontal force $F$ is applied on $6 k g$ block towards left. If the coefficients of friction between the surfaces are $0.3$ and $0.4$ as shown in the figure. then the value of tension in the rope and force required just to slide the $6 k g$ block under the $3 k g$ block is (Take $g = 10 m / s^{2}$ )

Discussion

28.	Find the equivalent capacitance between A and B.
Answer» Find the equivalent capacitance between $A$ and $B$ .

Discussion

29.	When 100 V of d.c. is applied across a solenoid a current of 1.0 A flows in it. When100 V of a.c. is applied across the same coil, the current drops to 0.5 A. The frequency of the ac source is 50 Hz. The impedance and inductance of the solenoid is
Answer» When $100 V$ of d.c. is applied across a solenoid a current of $1.0 A$ flows in it. When $100 V$ of a.c. is applied across the same coil, the current drops to $0.5 A .$ The frequency of the ac source is $50 Hz .$ The impedance and inductance of the solenoid is

Discussion

30.	An ideal gas having initial pressure P volume V and temperature T is allowed to expand adiabatically until its volume becomes 5.66V, while its temperature falls to T/2. Find the number of degrees of freedom of the gas molecule. (Take (5.66)0.4=2)
Answer» An ideal gas having initial pressure $P$ volume $V$ and temperature $T$ is allowed to expand adiabatically until its volume becomes $5.66 V$ , while its temperature falls to $T / 2$ . Find the number of degrees of freedom of the gas molecule. (Take $(5.66)^{0.4} = 2)$

Discussion

31.	ntThe length of a microscope is 14 cm and its magnifying power is 25 for relaxed eye.The focal length of the eye lens is 5 cm.The distance of the object from the objective isn nta)2.4 cmn ntb)2.5 cmn ntc)3.6 cmn ntd)1.8 cmn
Answer» ntThe length of a microscope is 14 cm and its magnifying power is 25 for relaxed eye.The focal length of the eye lens is 5 cm.The distance of the object from the objective isn nta)2.4 cmn ntb)2.5 cmn ntc)3.6 cmn ntd)1.8 cmn

Discussion

32.	The time period of a spring-mass system is T in air. When the mass is partially immersed in water, the time period of oscillation is T′. Then: [Assume the mass is cubical]
Answer» The time period of a spring-mass system is $T$ in air. When the mass is partially immersed in water, the time period of oscillation is $T^{'}$ . Then: [Assume the mass is cubical]

Discussion

33.	the time period of oscillation of a particle whose position varies with time t as x=(sinwt + sin2Wt+sin4wt ) isIn the solution, to calculate the lcm ,why we have divided by hcf of denominator?
Answer» the time period of oscillation of a particle whose position varies with time t as x=(sinwt + sin2Wt+sin4wt ) is In the solution, to calculate the lcm ,why we have divided by hcf of denominator?

Discussion

34.	(a) Write the functions of the three segments of a transistor.(b) The figure shows the input waveforms A and B for 'AND' gate. Draw the output waveform and write the truth table for this logic gate.
Answer» (a) Write the functions of the three segments of a transistor. (b) The figure shows the input waveforms A and B for 'AND' gate. Draw the output waveform and write the truth table for this logic gate.

Discussion

35.	Assuming steady state one-dimensional heat conduction in a composite slab, if Tinter=T1+T22, then which of the following statements is true about the respective thermal conductivities?
Answer» Assuming steady state one-dimensional heat conduction in a composite slab, if $T_{i n t e r} = \frac{T_{1} + T_{2}}{2},$ then which of the following statements is true about the respective thermal conductivities?

Discussion

36.	The density of a linear rod of length L=1 m varies as ρ=A+Bx, where A=104 kg/m3 & B=103 kg/m2 are constant, and x is the distance from the left end of the rod. Locate the center of mass of the rod.
Answer» The density of a linear rod of length $L = 1 m$ varies as $ρ = A + B x$ , where $A = 10^{4} {kg/m}^{3} & B = 10^{3} {kg/m}^{2}$ are constant, and $x$ is the distance from the left end of the rod. Locate the center of mass of the rod.

Discussion

37.	The threshold frequency for a photosensitive metalis 3.3 x 1014 Hz. If light of frequency 8.2 x 1014 Hzis incident on this metal, the cut-off voltage for thephotoelectric emission is nearly\lbrack AIPMT (Mains)-2011\rbrack(1) 5 V(2) 1 V(3) 2 V(4) 3 V
Answer» The threshold frequency for a photosensitive metalis 3.3 x 1014 Hz. If light of frequency 8.2 x 1014 Hzis incident on this metal, the cut-off voltage for thephotoelectric emission is nearly\lbrack AIPMT (Mains)-2011\rbrack(1) 5 V(2) 1 V(3) 2 V(4) 3 V

Discussion

38.	Check that the ratio ke2/G memp is dimensionless. Look up a Tableof Physical Constants and determine the value of this ratio. Whatdoes the ratio signify?
Answer» Check that the ratio ke2/G memp is dimensionless. Look up a Tableof Physical Constants and determine the value of this ratio. Whatdoes the ratio signify?

Discussion

39.	4g of metal contains 1.6g of oxygen then equivalent mass of metal i
Answer» 4g of metal contains 1.6g of oxygen then equivalent mass of metal i

Discussion

40.	a particle is projected vertically upward from the surface of earth with a kinetic energy equal to one fourth of the minimum value needed for it to escape the height to which it
Answer» a particle is projected vertically upward from the surface of earth with a kinetic energy equal to one fourth of the minimum value needed for it to escape the height to which it

Discussion

41.	Two tall buildings are 40 m apart. With what speed must a ball be thrown horizontally from a window 145 m above the ground in one building, so that it will enter a window 22.5 m from the ground in the other ?
Answer» Two tall buildings are $40 m$ apart. With what speed must a ball be thrown horizontally from a window $145 m$ above the ground in one building, so that it will enter a window $22.5 m$ from the ground in the other ?

Discussion

42.	A jet airplane travelling at a speed of 500 km/h ejects its products of combustion at the speed of 1500 km/h relative to the jet plane. What is the speed of the latter with respect to an observer on the ground?
Answer» A jet airplane travelling at a speed of $500 km/h$ ejects its products of combustion at the speed of $1500 km/h$ relative to the jet plane. What is the speed of the latter with respect to an observer on the ground?

Discussion

43.	ntA particle performs SHM in a straightline.In the first second ,starting from rest ,it travels a distance a and in the next second travels a distance b in the same side of mean position.The amplitude of SHM isn nta)a-bn ntb)2a-b/3n ntc)2asquare/3a-bn ntd)none of thesen
Answer» ntA particle performs SHM in a straightline.In the first second ,starting from rest ,it travels a distance a and in the next second travels a distance b in the same side of mean position.The amplitude of SHM isn nta)a-bn ntb)2a-b/3n ntc)2asquare/3a-bn ntd)none of thesen

Discussion

44.	A body A is thrown vertically upwards with such a velocity that it reaches a maximum height of h. Simultaneously, another body B is dropped from height h. It strikes the ground and does not rebound. The relative velocity of A wrt B to time graph is best represented by : (upward direction is positive)
Answer» A body $A$ is thrown vertically upwards with such a velocity that it reaches a maximum height of $h$ . Simultaneously, another body $B$ is dropped from height $h$ . It strikes the ground and does not rebound. The relative velocity of $A$ wrt $B$ to time graph is best represented by : (upward direction is positive)

Discussion

45.	Friction is independent of shape and size of body . Give condition for this statement
Answer» Friction is independent of shape and size of body . Give condition for this statement

Discussion

46.	A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor ?
Answer» A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor ?

Discussion

47.	a satellite of mass m0 is orbiting around the earth at a height h above the surface of the earth . if the mass of the earth is M and its radius is R , then angular momemtum of the satellite is ??
Answer» a satellite of mass m0 is orbiting around the earth at a height h above the surface of the earth . if the mass of the earth is M and its radius is R , then angular momemtum of the satellite is ??

Discussion

48.	A beaker contains water up to a height h1 and oil above water up to another height h2. Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is μ1 and that of oil is μ2.
Answer» A beaker contains water up to a height $h_{1}$ and oil above water up to another height $h_{2} .$ Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is $μ_{1}$ and that of oil is $μ_{2} .$

Discussion

49.	how to intrigrate ∫_0^H\lbrack H-h\rbrack dh
Answer» how to intrigrate ∫_0^H\lbrack H-h\rbrack dh

Discussion

50.	A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio [Roorkee 1999]
Answer» A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio [Roorkee 1999]

50.

A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio [Roorkee 1999]

Answer»

A closed pipe and an open pipe have their first overtones identical in

frequency. Their lengths are in the ratio

[Roorkee 1999]

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

41. Why in isothermal process Q is not 0 ? Q=nCΔ T \backslashΔ T=0 Then,why Q is not 0.

The temperature coefficient of resistance of a conductor varies as α(T)=3T2+2T. If R0 is resistance at T=0 and R is resistance at T, then

Acceleration of the particle in a rectilinear motion is given as a=3t2−2t+5 in (m/s2). The velocity of the particle as a function of time t is (Given, at t=0,u=−4 m/s)

A particle moves with a constant speed v along a parabolic path y=kx²,where k is a positive constant. Find the acceleration of the particle at the point x=0

87.Linear mass density varies as L=kx .The moment of inertia is maximum for

The excess pressure inside a soap bubble is twice the excess pressure inside a second soap bubble. The volume of the first bubble is n times the volume of the second where n is

Two slabs each of area A, length 2 m and 4 m, thermal conductivities k1=300 W/m∘C and k2=200 W/m∘C respectively are joined to form a single slab of length 6 m. Find the equivalent thermal conductivity of resultant slab. (in W/m∘C)

The figure shows two positions A and B at the same height h above the ground. If the maximum height of the projectile is H, then determine the time t elapsed between the positions A and B in terms of H.

A simple pendulum is set up in a trolley which moves to the right with an acceleration a on a horizontal plane. Then the thread of the pendulum in the mean position makes an angle θ with the vertical

If 10% of the electrical energy supplied to an incandescent light is radiated as visible light, the number of photons emitted by a 60 W bulb per second is 1.8×109.5k. The value of k is(Integer only) (λ=6000 ˙A)

141. A man is walking 5 steps forward & 3steps backward.Each step is 1m long and takes 1s.There is a pit 11m away from starting point.Then man will fall into the pit when

Find RAB (Call resistances in Ω )

In Fourier's law what does the negative sign indicate?

18. In which of the following pressure condition for 11.2 litre of oxygen at 300 Kelvin temperature maximum number of moles are possible: a) 0.5 ATM. b)760 mmhg. c)7.6cmhg. d)7.6 mmhg.

The value of 2π∫0xsin8xsin8x+cos8xdx is equal to

87.The capacitances of. Three capacitors are in the ratio of 1:2:3 the difference in the equivalent capacitance for their series and parallel combination .is 6 mue F . what are the capacitance of the capacitors?

Magnetic intensity due to magnitization is magnetic intensity H or intensity of magnetization I?

A simple pendulum is oscillating in a vertical plane. If resultant acceleration of bob of mass m at a point A is in horizontal direction, find the tangential force at this point in terms of tension (T) and weight of pendulum (mg).

A mass M attached to a horizontal spring with amplitude A1 when the mass M passes through through its mean position then a smaller mass m is placed over it and both of them move together with amplitude A2. The ratio of A1/A2 is ?

25.A car and a truck have kinetic energy. If equal retarding force is used to stop them then which will travel more distance ?

A rectangular film of liquid is extended from (4×2 cm) to (5×4cm) . If the work done is 0.0003J the value of surface tension is? How to calculate the no. Of sides of rectangle exposed?

The maximum horizontal thrust induced at the supports due to train of two point loads (30kN,20kN, 3m) apart crossing the three hinged arch(as shown in figure) is__________55

if a particle startiing velocity u and axclaration a=At3 given us,there A cons†an t and t time,then its last velocity given by that 1. u+at4 2. u+at4/4 3. u+at3 4. u+At3/

An Iron rod and a copper rod lie side by side. As the temperature is changed, the difference in the lengths of the rods remains constant at a value of 10 cm. Find the lengths at 0∘C. Coefficients of linear expansion of iron and copper are 1.1 × 10−6/∘C and 1.7 × 10−5/∘C respectively.

Find the equivalent capacitance between A and B.

When 100 V of d.c. is applied across a solenoid a current of 1.0 A flows in it. When100 V of a.c. is applied across the same coil, the current drops to 0.5 A. The frequency of the ac source is 50 Hz. The impedance and inductance of the solenoid is

An ideal gas having initial pressure P volume V and temperature T is allowed to expand adiabatically until its volume becomes 5.66V, while its temperature falls to T/2. Find the number of degrees of freedom of the gas molecule. (Take (5.66)0.4=2)

ntThe length of a microscope is 14 cm and its magnifying power is 25 for relaxed eye.The focal length of the eye lens is 5 cm.The distance of the object from the objective isn nta)2.4 cmn ntb)2.5 cmn ntc)3.6 cmn ntd)1.8 cmn

The time period of a spring-mass system is T in air. When the mass is partially immersed in water, the time period of oscillation is T′. Then: [Assume the mass is cubical]

the time period of oscillation of a particle whose position varies with time t as x=(sinwt + sin2Wt+sin4wt ) isIn the solution, to calculate the lcm ,why we have divided by hcf of denominator?

(a) Write the functions of the three segments of a transistor.(b) The figure shows the input waveforms A and B for 'AND' gate. Draw the output waveform and write the truth table for this logic gate.

Assuming steady state one-dimensional heat conduction in a composite slab, if Tinter=T1+T22, then which of the following statements is true about the respective thermal conductivities?

The density of a linear rod of length L=1 m varies as ρ=A+Bx, where A=104 kg/m3 &amp; B=103 kg/m2 are constant, and x is the distance from the left end of the rod. Locate the center of mass of the rod.

The threshold frequency for a photosensitive metalis 3.3 x 1014 Hz. If light of frequency 8.2 x 1014 Hzis incident on this metal, the cut-off voltage for thephotoelectric emission is nearly\lbrack AIPMT (Mains)-2011\rbrack(1) 5 V(2) 1 V(3) 2 V(4) 3 V

Check that the ratio ke2/G memp is dimensionless. Look up a Tableof Physical Constants and determine the value of this ratio. Whatdoes the ratio signify?

4g of metal contains 1.6g of oxygen then equivalent mass of metal i

a particle is projected vertically upward from the surface of earth with a kinetic energy equal to one fourth of the minimum value needed for it to escape the height to which it

Two tall buildings are 40 m apart. With what speed must a ball be thrown horizontally from a window 145 m above the ground in one building, so that it will enter a window 22.5 m from the ground in the other ?

A jet airplane travelling at a speed of 500 km/h ejects its products of combustion at the speed of 1500 km/h relative to the jet plane. What is the speed of the latter with respect to an observer on the ground?

ntA particle performs SHM in a straightline.In the first second ,starting from rest ,it travels a distance a and in the next second travels a distance b in the same side of mean position.The amplitude of SHM isn nta)a-bn ntb)2a-b/3n ntc)2asquare/3a-bn ntd)none of thesen

Friction is independent of shape and size of body . Give condition for this statement

A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor ?

a satellite of mass m0 is orbiting around the earth at a height h above the surface of the earth . if the mass of the earth is M and its radius is R , then angular momemtum of the satellite is ??

A beaker contains water up to a height h1 and oil above water up to another height h2. Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is μ1 and that of oil is μ2.

how to intrigrate ∫_0^H\lbrack H-h\rbrack dh

A closed pipe and an open pipe have their first overtones identical in frequency. Their lengths are in the ratio [Roorkee 1999]

The density of a linear rod of length L=1 m varies as ρ=A+Bx, where A=104 kg/m3 & B=103 kg/m2 are constant, and x is the distance from the left end of the rod. Locate the center of mass of the rod.