50278 + Interview Questions in Physics

1.	A ray of light is incident grazingly at one face of an equilateral prism. If the emerges grazingly at the other face. The refractive index of the prism is
Answer» A ray of light is incident grazingly at one face of an equilateral prism. If the emerges grazingly at the other face. The refractive index of the prism is

Discussion

2.	why direction of field is in downward direction to balance the weight of negative charge?
Answer» why direction of field is in downward direction to balance the weight of negative charge?

Discussion

3.	A wire of area of cross-section 3.0 mm2 and natural length 50 cm is fixed at one end and a mass of 2.1 kg is hung from the other end. Find the elastic potential energy stored in the wire in steady state. Young’s modulus of the material of the wire =1.9×1011 Nm−2. Take g=10 ms−2.
Answer» A wire of area of cross-section $3.0 m m^{2}$ and natural length $50 c m$ is fixed at one end and a mass of $2.1 k g$ is hung from the other end. Find the elastic potential energy stored in the wire in steady state. Young’s modulus of the material of the wire $= 1.9 \times 10^{11} N m^{- 2}$ . Take $g = 10 m s^{- 2}$ .

Discussion

4.	A galvanometer has 36 ohm resistance. If a 4 ohm shunt is added to this, the fraction of current that passes through the galvanometer is- (1) 1/4 (2) 1/9 (3) 1/10 (4) 1/40
Answer» A galvanometer has 36 ohm resistance. If a 4 ohm shunt is added to this, the fraction of current that passes through the galvanometer is- (1) 1/4 (2) 1/9 (3) 1/10 (4) 1/40

Discussion

5.	a ball is projected vertically upward with sone initial speed.if at half of maximum height its speed is 20\surd2m/s then half of maximum height is ?
Answer» a ball is projected vertically upward with sone initial speed.if at half of maximum height its speed is 20\surd2m/s then half of maximum height is ?

Discussion

6.	A single-plate clutch has a friction disc with inner and outer radii of 20 mm and 40 mm respectively. The friction lining in the disc is made in such a way that the coefficient of friction μ varies radially as μ = 0.01 r, where r is in mm. The clutch needs to transmit a friction torque of 18.85 kN mm. As per uniform pressure theory the pressure (in MPa) on the disc is0.5
Answer» A single-plate clutch has a friction disc with inner and outer radii of 20 mm and 40 mm respectively. The friction lining in the disc is made in such a way that the coefficient of friction $μ$ varies radially as $μ$ = 0.01 r, where r is in mm. The clutch needs to transmit a friction torque of 18.85 kN mm. As per uniform pressure theory the pressure (in MPa) on the disc is 0.5

Discussion

7.	Two non-conducting infinite plane sheets having charges Q and 2Q are placed parallel to each other as shown in figure. The charge distribution on four faces of two plates are also shown. The electric field intensities at three points 1, 2 and 3 are →E1, →E2 and →E3 repectively then the magnitudes of →E1 , →E2 and →E3 are respectively [Take S is face area of plates]
Answer» Two non-conducting infinite plane sheets having charges $Q$ and $2 Q$ are placed parallel to each other as shown in figure. The charge distribution on four faces of two plates are also shown. The electric field intensities at three points $1, 2$ and $3$ are ${\to E}_{1}, {\to E}_{2}$ and ${\to E}_{3}$ repectively then the magnitudes of ${\to E}_{1}, {\to E}_{2}$ and ${\to E}_{3}$ are respectively [Take $S$ is face area of plates]

Discussion

8.	A particle fo mass 100 g is kept on the surface of a uniform sphere of mass 10 kg and radius 10 cm. find the work to be done against the gravitational force between them to take the particle away from the sphere.
Answer» A particle fo mass 100 g is kept on the surface of a uniform sphere of mass 10 kg and radius 10 cm. find the work to be done against the gravitational force between them to take the particle away from the sphere.

Discussion

9.	In the below circuit, the current in each resistor is
Answer» In the below circuit, the current in each resistor is

Discussion

10.	In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium state B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via a process in which the net heat absorbed by the system is 9.35 cal, how much is the net work done by the system in the latter case ? (Take 1 cal = 4.19 J)
Answer» In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium state B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via a process in which the net heat absorbed by the system is 9.35 cal, how much is the net work done by the system in the latter case ? (Take 1 cal = 4.19 J)

Discussion

11.	Resistor of resistance of 6 Ω each are connected in the manner shown in figure. With the current 0.5 A, the potential difference VA−VB
Answer» Resistor of resistance of $6 Ω$ each are connected in the manner shown in figure. With the current $0.5 A$ , the potential difference $V_{A} - V_{B}$

Discussion

12.	A metal ball weighs 0.096 N in air. If suspended in water, it has an apparent weight of 0.071 N. The density of the metal ball is
Answer» A metal ball weighs $0.096 N$ in air. If suspended in water, it has an apparent weight of $0.071 N$ . The density of the metal ball is

Discussion

13.	A block of mass 1 kg is moving down the inclined plane with cons†an t velocity f 10 m/s . if angle of inclination is 37^° then coefficient of kinetic friction between the inclined plane and the block is
Answer» A block of mass 1 kg is moving down the inclined plane with cons†an t velocity f 10 m/s . if angle of inclination is 37^° then coefficient of kinetic friction between the inclined plane and the block is

Discussion

14.	Whats charge on electron
Answer» Whats charge on electron

Discussion

15.	Two insulated conductors are charged by transferring electrons from one conductor to the other. A potential difference of 100 V was produced by transferring 6.25×1015 electrons from one conductor to the other. The capacitance of the system will be
Answer» Two insulated conductors are charged by transferring electrons from one conductor to the other. A potential difference of $100 V$ was produced by transferring $6.25 \times 10^{15}$ electrons from one conductor to the other. The capacitance of the system will be

Discussion

16.	A galvanometer has an internal resistance of 50 ohms and the current required for full scale deflection is 1mA
Answer» A galvanometer has an internal resistance of 50 ohms and the current required for full scale deflection is 1mA

Discussion

17.	A resistive transducer is used to measure quantity x is connected in the signal conditioning circuit as shown below. For x=10 , magnitude of sensitivity (Vo/Vs) of the circuit is ? 6.66
Answer» A resistive transducer is used to measure quantity x is connected in the signal conditioning circuit as shown below. For $x = 10$ , magnitude of sensitivity $(V_{o} / V_{s})$ of the circuit is ? 6.66

Discussion

18.	LIUN . 13rnating voltage is given by e (6 sinwt+ 8 cos w) volt. The peak value ofvoltage is given byOptions542V10V10-/2V10
Answer» LIUN . 13rnating voltage is given by e (6 sinwt+ 8 cos w) volt. The peak value ofvoltage is given byOptions542V10V10-/2V10

Discussion

19.	The rate of change of potential difference across capacitor is 5×102 V/s. If capacitance is 2 μF, then displacement current between its plates is
Answer» The rate of change of potential difference across capacitor is $5 \times 10^{2} V/s$ . If capacitance is $2 μ F$ , then displacement current between its plates is

Discussion

20.	what will be the sress at -20^° c, if a steel rod is streched between two fixed points? the tensile load at 20^° c is 5000N (cross sectional area of rod is 150mm^2)
Answer» what will be the sress at -20^° c, if a steel rod is streched between two fixed points? the tensile load at 20^° c is 5000N (cross sectional area of rod is 150mm^2)

Discussion

21.	a coconut of mass m falls from the tree through a vertical distance of s and could reach ground with a velocity of v m/s due to air resistance .work done by air resistance is kindly explain
Answer» a coconut of mass m falls from the tree through a vertical distance of s and could reach ground with a velocity of v m/s due to air resistance .work done by air resistance is kindly explain

Discussion

22.	A particle is moving in a straight line whose velocity at x= 2 m is 3 m/s. If position of the particle varies with acceleration as a= 2x, where a and x are in SI units, then the velocity of particle at x = 5 m is
Answer» A particle is moving in a straight line whose velocity at x= 2 m is 3 m/s. If position of the particle varies with acceleration as a= 2x, where a and x are in SI units, then the velocity of particle at x = 5 m is

Discussion

23.	Just as precise measurements are necessary in science, it is equally important to be able to make rough estimates of quantities using rudimentary ideas and common observations. Think of ways by which you can estimate the following (where an estimate is difficult to obtain, try to get an upper bound on the quantity) : (a) the total mass of rain-bearing clouds over India during the Monsoon (b) the mass of an elephant (c) the wind speed during a storm (d) the number of strands of hair on your head (e) the number of air molecules in your classroom.
Answer» Just as precise measurements are necessary in science, it is equally important to be able to make rough estimates of quantities using rudimentary ideas and common observations. Think of ways by which you can estimate the following (where an estimate is difficult to obtain, try to get an upper bound on the quantity) : (a) the total mass of rain-bearing clouds over India during the Monsoon (b) the mass of an elephant (c) the wind speed during a storm (d) the number of strands of hair on your head (e) the number of air molecules in your classroom.

Discussion

24.	if a particle is moving on a circular path with constant speed,then the angle between the direction of acceleration and it's position vector w.r.t. centre of circle will be
Answer» if a particle is moving on a circular path with constant speed,then the angle between the direction of acceleration and it's position vector w.r.t. centre of circle will be

Discussion

25.	Emission or Absorption spectra experiment is performed with
Answer» Emission or Absorption spectra experiment is performed with

Discussion

26.	A police jeep is chasing a thief with velocity of 45 km/h. The thief is in another jeep moving with velocity 153 km/h. Police fires a bullet with muzzle velocity of 180 m/s The velocity of the bullet with respect to the jeep of the thief is:
Answer» A police jeep is chasing a thief with velocity of $45 km/h$ . The thief is in another jeep moving with velocity $153 km/h$ . Police fires a bullet with muzzle velocity of $180 m/s$ The velocity of the bullet with respect to the jeep of the thief is:

Discussion

27.	A driving mirror consist of a cylindrical mirror if radius of curvature 10 cm and the length over the curved surface is 10 cm. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is2.0; 4; 3 or 5 ?
Answer» A driving mirror consist of a cylindrical mirror if radius of curvature 10 cm and the length over the curved surface is 10 cm. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is 2.0; 4; 3 or 5 ?

Discussion

28.	A block of mass 300 gram is pulled up on a slope by a distance of 200 centimetre by applying a force of 200 gf . calculate work done by force in moving the block and gain in potential energy (Take inclination of slope 60 degree)
Answer» A block of mass 300 gram is pulled up on a slope by a distance of 200 centimetre by applying a force of 200 gf . calculate work done by force in moving the block and gain in potential energy (Take inclination of slope 60 degree)

Discussion

29.	The modulation index of a single-tone amplitude modulated (AM) signal is increased from 0.20 to 0.25. The corresponding percentage increases in the transmission power efficiency of the AM signal is______%54.6
Answer» The modulation index of a single-tone amplitude modulated (AM) signal is increased from 0.20 to 0.25. The corresponding percentage increases in the transmission power efficiency of the AM signal is______% 54.6

Discussion

30.	110.What is the order of mass of a human?
Answer» 110.What is the order of mass of a human?

Discussion

31.	In the given figure, a=15 m/s2 represents the total acceleration of a particle moving in the clockwise direction in a circle of radius R=2.5 m at a given instant of time. The speed of particle at that instant will be
Answer» In the given figure, $a = 15 {m/s}^{2}$ represents the total acceleration of a particle moving in the clockwise direction in a circle of radius $R = 2.5 m$ at a given instant of time. The speed of particle at that instant will be

Discussion

32.	Three bricks each of length L and mass M arearranged as shown. The distance of the centre ofmass of the system from the wall is :-Wallk-L2→
Answer» Three bricks each of length L and mass M are arranged as shown. The distance of the centre of mass of the system from the wall is :- Wall k-L2→

Discussion

33.	Two satellites S1 and S2 revolve round a planet in coplanar circular orbits in same sense. Their periods of revolution are 1 hr and 8 hrs respectively. Radius of orbit of S1 is 104 km. When S1 is closest to S2, relative speed of S1 with respect to S2 is n×104 km/h, here n is (Answer upto two digits after the decimal point.)
Answer» Two satellites $S_{1}$ and $S_{2}$ revolve round a planet in coplanar circular orbits in same sense. Their periods of revolution are 1 hr and 8 hrs respectively. Radius of orbit of $S_{1}$ is $10^{4}$ km. When $S_{1}$ is closest to $S_{2}$ , relative speed of $S_{1}$ with respect to $S_{2}$ is $n \times 10^{4}$ km/h, here n is (Answer upto two digits after the decimal point.)

Discussion

34.	Through which of these can we distinguish the light waves from sound waves? [CBSE PMT 1990; RPET 2000, 02]
Answer» Through which of these can we distinguish the light waves from sound waves? [CBSE PMT 1990; RPET 2000, 02]

Discussion

35.	Match the block diagrams of block of mass 'm' with their corresponding free body diagram. (String is massless)
Answer» Match the block diagrams of block of mass 'm' with their corresponding free body diagram. (String is massless)

35.

Match the block diagrams of block of mass 'm' with their corresponding free body diagram. (String is massless)

Answer»

Match the block diagrams of block of mass 'm' with their corresponding free body diagram. (String is massless)

Discussion

36.	The ends of two rods of different materials with their thermal conductivities, radii of cross-sections and lengths all are in the ratio 1:2 are maintained at the same temperature difference. If the rate of flow of heat in the longer rod is 4 cal/sec, then that in the shorter rod in cal/sec will be
Answer» The ends of two rods of different materials with their thermal conductivities, radii of cross-sections and lengths all are in the ratio $1 : 2$ are maintained at the same temperature difference. If the rate of flow of heat in the longer rod is $4 cal/sec$ , then that in the shorter rod in $cal/sec$ will be

Discussion

37.	A short reach of a 3 m wide rectangular open channel has its bed level falling in the direction of flow at a slope of 1 in 10000. It carries a discharge of 5 cumecs and its manning's roughness coefficient is 0.012. The flow in the reach is gradually varying. At a certain section in this reach, the depth of flow was measured as 0.6 m. The rate of change of water depth with distance (i.e., dydx) at this section is ×10−3.Take g=10ms−211.5
Answer» A short reach of a 3 m wide rectangular open channel has its bed level falling in the direction of flow at a slope of 1 in 10000. It carries a discharge of 5 cumecs and its manning's roughness coefficient is 0.012. The flow in the reach is gradually varying. At a certain section in this reach, the depth of flow was measured as 0.6 m. The rate of change of water depth with distance (i.e., $\frac{d y}{d x}$ ) at this section is $\times 10^{- 3}$ . $T a k e g = 10 m s^{- 2}$ 11.5

Discussion

38.	silver and copper voltmeters are connected in parallel with a battery of emf 12 v. in 30 min 1 g of silver and 1.8 g of copper are liberated. the energy supplied by the battery is
Answer» silver and copper voltmeters are connected in parallel with a battery of emf 12 v. in 30 min 1 g of silver and 1.8 g of copper are liberated. the energy supplied by the battery is

Discussion

39.	Three point masses each of mass m are placed at the corners of an equilateral triangle of side a. The moment of inertia of system about the side AB is
Answer» Three point masses each of mass m are placed at the corners of an equilateral triangle of side a. The moment of inertia of system about the side AB is

Discussion

40.	The mass of a hydrogen molecule is 3.32×10−27 kg. If 1023 hydrogen molecules strike per second at 2 cm2 area of rigid wall of a close container normally and rebound back with the speed of 1000 m/s, then the pressure exerted on the wall (according to kinetic theory of gas) is :
Answer» The mass of a hydrogen molecule is $3.32 \times 10^{- 27} kg$ . If $10^{23}$ hydrogen molecules strike per second at $2 {cm}^{2}$ area of rigid wall of a close container normally and rebound back with the speed of $1000 m/s$ , then the pressure exerted on the wall (according to kinetic theory of gas) is :

Discussion

41.	A scooter is going at a speed v at a turn having radius 20 m. If turn A is horizontal and slope of the road is 0.5, find the minimum time in which he can complete the turn, assuming the scooter follows uniform circular motion.
Answer» A scooter is going at a speed v at a turn having radius 20 m. If turn A is horizontal and slope of the road is 0.5, find the minimum time in which he can complete the turn, assuming the scooter follows uniform circular motion.

Discussion

42.	Equivalent mass of the trivalent metal is 20.What will be the molar mass of its sulphate?
Answer» Equivalent mass of the trivalent metal is 20.What will be the molar mass of its sulphate?

Discussion

43.	The frequency of a sonometer wire is 100 Hz. When the weight producing the tension is completely immersed in water the frequency becomes 80 Hz and on immersing the weight in a certain liquid the frequency becomes 60 Hz. The specific gravity of the liquid is
Answer» The frequency of a sonometer wire is $100 Hz$ . When the weight producing the tension is completely immersed in water the frequency becomes $80 Hz$ and on immersing the weight in a certain liquid the frequency becomes $60 Hz$ . The specific gravity of the liquid is

Discussion

44.	why while calculating the density of q nucleus do we multiply the volume with the mass number?
Answer» why while calculating the density of q nucleus do we multiply the volume with the mass number?

Discussion

45.	A potentiometer arrangement is shown in the figure. Driving cell has e.m.f. e and internal resistance r. Resistance of potentiometer wire AB is R. F is the cell of e.m.f. e3 and internal resistance r3. Balance point (J) can be obtained for all finite values of
Answer» A potentiometer arrangement is shown in the figure. Driving cell has e.m.f. $e$ and internal resistance $r$ . Resistance of potentiometer wire $AB$ is $R . F$ is the cell of e.m.f. $\frac{e}{3}$ and internal resistance $\frac{r}{3}$ . Balance point $(J)$ can be obtained for all finite values of

Discussion

46.	If the distance between two masses is doubled, the gravitational attraction between them
Answer» If the distance between two masses is doubled, the gravitational attraction between them

Discussion

47.	A particle of mass 1 kg is projected with a speed of 10 m/s in a uniform gravitational field as shown in the figure. The trajectory of the particle is given by
Answer» A particle of mass $1 kg$ is projected with a speed of $10 m/s$ in a uniform gravitational field as shown in the figure. The trajectory of the particle is given by

Discussion

48.	∫_{}^{}3xd
Answer» ∫_{}^{}3xd

Discussion

49.	Ball bearings are rated by a manufacturer for a life of 106 revolutions. The catalogue rating of a particular bearing is 16 kN. If the design load is 2 kN, the life of the bearing will beP×106 revolutions, where P is equal to 512
Answer» $Ball bearings are rated by a manufacturer for a life of 10^{6} revolutions. The catalogue rating of a particular bearing is 16 kN. If the design load is 2 kN, the life of the bearing will be P \times 10^{6} revolutions, where P is equal to$ 512

Discussion

50.	An arc of radius 6 m subtends an angle 120∘ at the centre. If an ant travels on the arc from one end to another end in 4 sec, what will be the magnitude of average velocity of the ant ?
Answer» An arc of radius $6 m$ subtends an angle $120^{\circ}$ at the centre. If an ant travels on the arc from one end to another end in $4 sec$ , what will be the magnitude of average velocity of the ant ?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A ray of light is incident grazingly at one face of an equilateral prism. If the emerges grazingly at the other face. The refractive index of the prism is

why direction of field is in downward direction to balance the weight of negative charge?

A wire of area of cross-section 3.0 mm2 and natural length 50 cm is fixed at one end and a mass of 2.1 kg is hung from the other end. Find the elastic potential energy stored in the wire in steady state. Young’s modulus of the material of the wire =1.9×1011 Nm−2. Take g=10 ms−2.

A galvanometer has 36 ohm resistance. If a 4 ohm shunt is added to this, the fraction of current that passes through the galvanometer is- (1) 1/4 (2) 1/9 (3) 1/10 (4) 1/40

a ball is projected vertically upward with sone initial speed.if at half of maximum height its speed is 20\surd2m/s then half of maximum height is ?

A particle fo mass 100 g is kept on the surface of a uniform sphere of mass 10 kg and radius 10 cm. find the work to be done against the gravitational force between them to take the particle away from the sphere.

In the below circuit, the current in each resistor is

Resistor of resistance of 6 Ω each are connected in the manner shown in figure. With the current 0.5 A, the potential difference VA−VB

A metal ball weighs 0.096 N in air. If suspended in water, it has an apparent weight of 0.071 N. The density of the metal ball is

A block of mass 1 kg is moving down the inclined plane with cons†an t velocity f 10 m/s . if angle of inclination is 37^° then coefficient of kinetic friction between the inclined plane and the block is

Whats charge on electron

Two insulated conductors are charged by transferring electrons from one conductor to the other. A potential difference of 100 V was produced by transferring 6.25×1015 electrons from one conductor to the other. The capacitance of the system will be

A galvanometer has an internal resistance of 50 ohms and the current required for full scale deflection is 1mA

A resistive transducer is used to measure quantity x is connected in the signal conditioning circuit as shown below. For x=10 , magnitude of sensitivity (Vo/Vs) of the circuit is ? 6.66

LIUN . 13rnating voltage is given by e (6 sinwt+ 8 cos w) volt. The peak value ofvoltage is given byOptions542V10V10-/2V10

The rate of change of potential difference across capacitor is 5×102 V/s. If capacitance is 2 μF, then displacement current between its plates is

what will be the sress at -20^° c, if a steel rod is streched between two fixed points? the tensile load at 20^° c is 5000N (cross sectional area of rod is 150mm^2)

a coconut of mass m falls from the tree through a vertical distance of s and could reach ground with a velocity of v m/s due to air resistance .work done by air resistance is kindly explain

A particle is moving in a straight line whose velocity at x= 2 m is 3 m/s. If position of the particle varies with acceleration as a= 2x, where a and x are in SI units, then the velocity of particle at x = 5 m is

if a particle is moving on a circular path with constant speed,then the angle between the direction of acceleration and it's position vector w.r.t. centre of circle will be

Emission or Absorption spectra experiment is performed with

A police jeep is chasing a thief with velocity of 45 km/h. The thief is in another jeep moving with velocity 153 km/h. Police fires a bullet with muzzle velocity of 180 m/s The velocity of the bullet with respect to the jeep of the thief is:

A driving mirror consist of a cylindrical mirror if radius of curvature 10 cm and the length over the curved surface is 10 cm. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is2.0; 4; 3 or 5 ?

A block of mass 300 gram is pulled up on a slope by a distance of 200 centimetre by applying a force of 200 gf . calculate work done by force in moving the block and gain in potential energy (Take inclination of slope 60 degree)

The modulation index of a single-tone amplitude modulated (AM) signal is increased from 0.20 to 0.25. The corresponding percentage increases in the transmission power efficiency of the AM signal is______%54.6

110.What is the order of mass of a human?

In the given figure, a=15 m/s2 represents the total acceleration of a particle moving in the clockwise direction in a circle of radius R=2.5 m at a given instant of time. The speed of particle at that instant will be

Three bricks each of length L and mass M arearranged as shown. The distance of the centre ofmass of the system from the wall is :-Wallk-L2→

Through which of these can we distinguish the light waves from sound waves? [CBSE PMT 1990; RPET 2000, 02]

Match the block diagrams of block of mass 'm' with their corresponding free body diagram. (String is massless)

The ends of two rods of different materials with their thermal conductivities, radii of cross-sections and lengths all are in the ratio 1:2 are maintained at the same temperature difference. If the rate of flow of heat in the longer rod is 4 cal/sec, then that in the shorter rod in cal/sec will be

silver and copper voltmeters are connected in parallel with a battery of emf 12 v. in 30 min 1 g of silver and 1.8 g of copper are liberated. the energy supplied by the battery is

Three point masses each of mass m are placed at the corners of an equilateral triangle of side a. The moment of inertia of system about the side AB is

The mass of a hydrogen molecule is 3.32×10−27 kg. If 1023 hydrogen molecules strike per second at 2 cm2 area of rigid wall of a close container normally and rebound back with the speed of 1000 m/s, then the pressure exerted on the wall (according to kinetic theory of gas) is :

A scooter is going at a speed v at a turn having radius 20 m. If turn A is horizontal and slope of the road is 0.5, find the minimum time in which he can complete the turn, assuming the scooter follows uniform circular motion.

Equivalent mass of the trivalent metal is 20.What will be the molar mass of its sulphate?

The frequency of a sonometer wire is 100 Hz. When the weight producing the tension is completely immersed in water the frequency becomes 80 Hz and on immersing the weight in a certain liquid the frequency becomes 60 Hz. The specific gravity of the liquid is

why while calculating the density of q nucleus do we multiply the volume with the mass number?

A potentiometer arrangement is shown in the figure. Driving cell has e.m.f. e and internal resistance r. Resistance of potentiometer wire AB is R. F is the cell of e.m.f. e3 and internal resistance r3. Balance point (J) can be obtained for all finite values of

If the distance between two masses is doubled, the gravitational attraction between them

A particle of mass 1 kg is projected with a speed of 10 m/s in a uniform gravitational field as shown in the figure. The trajectory of the particle is given by

∫_{}^{}3xd

Ball bearings are rated by a manufacturer for a life of 106 revolutions. The catalogue rating of a particular bearing is 16 kN. If the design load is 2 kN, the life of the bearing will beP×106 revolutions, where P is equal to 512

An arc of radius 6 m subtends an angle 120∘ at the centre. If an ant travels on the arc from one end to another end in 4 sec, what will be the magnitude of average velocity of the ant ?