Physics Question and Answers

Column I	Column II
(i)	When a body does work against friction, its kinetic energy	(p)	Independent of time
(ii)	Work done by a body is	(q)	Time
(iii)	Power of a body varies inversely as	(r)	Force must be inversely as conservative
(iv)	When work done over a closed path is zero	(s)	Decreases

Work, Energy and Power

12. A pulse is generated at lower end of a hanging rope of uniform density and length $L$. The speed of the pulse when it reaches the mid point of rope is

Waves

13. Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $27 \times 10^{-22}\, C\, m^{-2}$. The electric field $\vec{E}$ in region $II$ in between the plates is

Electric Charges and Fields

14. Internal energy of a gas remains unchanged in
(I) an isothermal process
(II) an adiabatic process
(III) a reversible process
(IV) a cyclic process
Which of the these are true?

JIPMER 2014 Thermodynamics

15. Among the following one is wrong

Nuclei

16. A small spherical ball falling through a viscous medium of negligible density has terminal velocity $v$. Another ball of the same mass but of radius twice that of the earlier falling through the same viscous medium will have terminal velocity

KEAM 2009 Mechanical Properties of Fluids

17. A coil of wire of a certain radius has $100$ turns and a self inductance of $15\, mH$. The self inductance of a second similar coil of $500$ turns will be

AIIMS 2009 Electromagnetic Induction

18. A network of four capacitors of capacity equal to $C_{1}=C, C_{2}=2 C, C_{3}=3 C$ and $C_{4}=4 C$ are connected to a battery as shown in the figure. The ratio of the charges on $C_{2}$ and $C_{4}$ is.:

DUMET/DPMT/Delhi UMET 2006

19. A circular platform is free to rotate in a horizontal plane about a vertical axis passing through its centre. A tortoise is sitting at the edge of the platform. Now the platform is given an angular velocity ${\omega}_0$ When the tortoise move along a chord of the platform with a constant velocity (with respect to the platform). The angular velocity of the platform $\omega (t)$ will vary with time t as

IIT JEE 2002 System of Particles and Rotational Motion

20. If unpolarized light falls on a glass plate $\left(\mu=1.54\right)$ at an incidence angle of $57^{\circ}$, the reflected light is

UPSEE 2011 Wave Optics

21. Let $K_{1}$ and $K_{2}$ be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $\lambda_{1}$ and $\lambda_{2}$, respectively are incident on a metallic surface. If $\lambda_{1}=3 \lambda_{2}$ then:

JEE Main 2022 Dual Nature of Radiation and Matter

22. A logic gate whose output will be in logic 0 state only when all inputs are in logic 1 state is called

COMEDK 2010 Semiconductor Electronics: Materials Devices and Simple Circuits

23. A proton and an $\alpha$-particle are accelerated from rest to the same energy. The de Broglie wavelengths $\lambda_{p}$ and $\lambda_{\alpha}$ are in the ratio,

NEET 2019

24. When a small mass $m$ is suspended at lower end of an elastic wire having upper end fixed with ceiling. There is loss in gravitational potential energy, let it be $x$, due to extension of wire, mark correct option

Mechanical Properties of Solids

25. Two point electric charges $+10^{-8} C$ and $-10^{-8} C$ are placed $0.1 \,m$ apart. Find the magnitude of Total Electric field at the center of the line joining the two charges.

Gujarat CET 2020

26. A charge is moving across a junction, then

Current Electricity

27. A particle of mass $m$ moves in a circular path radius $r$ under the action of a force $\frac{m v^{2}}{r}$. The work done during its motion over half of the circumference of the circular path will be

AFMC 2009

28. For long distance transmission, the $ac$ is stepped up because transmission at high voltage is :

Electromagnetic Induction

29. Assertion :Diamonds are known for their spectacular brilliance, but diamonds found in nature rarely exhibit the brilliance
Reason: By cutting the diamond suitably, multiple total internal reflections can be made to occur.

Ray Optics and Optical Instruments

30. A coil has resistance $25.00 \Omega$. and $25.17 \Omega$ at $20^{\circ} C$ and $35^{\circ} C$ respectively. What is the temperature coefficient of resistance?

J & K CET 2012 Current Electricity

Physics Questions

Physics Questions

1. The refractive indices of the material of a lens for violet and red colours are respectively $1.56$ and $1.54$. If the focal length of the lens for violet light is $40\, cm$, then focal length for red colour is

2. Plates of a parallel plate capacitor, having a potential difference $100 \, V$ applied across them, carry a surface charge density of $50 \, nC \, cm^{- 2}$ . Spacing between the plates is

3. The surface temperature of the sun is $T_{0}$ and it is at average distance $d$ from a planet. The radius of the sun is $R$. The temperature at which planet radiates the energy is

4. Two stones are projected with the same speed but making different angles with the horizontal. Their horizontal ranges are equal. The angle of projection of one is $\pi / 3$ and the maximum height reached by it is 102 metres. Then the maximum height reached by the other in metres is

5. If the over-bridge is concave instead of being convex, the thrust on the road at the lowest position will be

6. A liquid is allowed to flow into a cone shape pipe. Choose the correct option from the following.

7. Which of the following statements is correct?

8. What powered lens should be used for the correction of a myopic eye whose far point is $85 \,cm$?

9. If the radius of the earth is $R$ , then the height $h$ at which the value of $g$ becomes one-fourth, will be

12. A pulse is generated at lower end of a hanging rope of uniform density and length $L$. The speed of the pulse when it reaches the mid point of rope is

13. Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $27 \times 10^{-22}\, C\, m^{-2}$. The electric field $\vec{E}$ in region $II$ in between the plates is

14. Internal energy of a gas remains unchanged in
(I) an isothermal process
(II) an adiabatic process
(III) a reversible process
(IV) a cyclic process
Which of the these are true?

15. Among the following one is wrong

16. A small spherical ball falling through a viscous medium of negligible density has terminal velocity $v$. Another ball of the same mass but of radius twice that of the earlier falling through the same viscous medium will have terminal velocity

17. A coil of wire of a certain radius has $100$ turns and a self inductance of $15\, mH$. The self inductance of a second similar coil of $500$ turns will be

18. A network of four capacitors of capacity equal to $C_{1}=C, C_{2}=2 C, C_{3}=3 C$ and $C_{4}=4 C$ are connected to a battery as shown in the figure. The ratio of the charges on $C_{2}$ and $C_{4}$ is.:

20. If unpolarized light falls on a glass plate $\left(\mu=1.54\right)$ at an incidence angle of $57^{\circ}$, the reflected light is

21. Let $K_{1}$ and $K_{2}$ be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $\lambda_{1}$ and $\lambda_{2}$, respectively are incident on a metallic surface. If $\lambda_{1}=3 \lambda_{2}$ then:

22. A logic gate whose output will be in logic 0 state only when all inputs are in logic 1 state is called

23. A proton and an $\alpha$-particle are accelerated from rest to the same energy. The de Broglie wavelengths $\lambda_{p}$ and $\lambda_{\alpha}$ are in the ratio,

24. When a small mass $m$ is suspended at lower end of an elastic wire having upper end fixed with ceiling. There is loss in gravitational potential energy, let it be $x$, due to extension of wire, mark correct option

25. Two point electric charges $+10^{-8} C$ and $-10^{-8} C$ are placed $0.1 \,m$ apart. Find the magnitude of Total Electric field at the center of the line joining the two charges.

26. A charge is moving across a junction, then

27. A particle of mass $m$ moves in a circular path radius $r$ under the action of a force $\frac{m v^{2}}{r}$. The work done during its motion over half of the circumference of the circular path will be

28. For long distance transmission, the $ac$ is stepped up because transmission at high voltage is :

29. Assertion :Diamonds are known for their spectacular brilliance, but diamonds found in nature rarely exhibit the brilliance
Reason: By cutting the diamond suitably, multiple total internal reflections can be made to occur.

30. A coil has resistance $25.00 \Omega$. and $25.17 \Omega$ at $20^{\circ} C$ and $35^{\circ} C$ respectively. What is the temperature coefficient of resistance?

Physics Questions

Physics Questions

1. The refractive indices of the material of a lens for violet and red colours are respectively $1.56$ and $1.54$. If the focal length of the lens for violet light is $40\, cm$, then focal length for red colour is

2. Plates of a parallel plate capacitor, having a potential difference $100 \, V$ applied across them, carry a surface charge density of $50 \, nC \, cm^{- 2}$ . Spacing between the plates is

3. The surface temperature of the sun is $T_{0}$ and it is at average distance $d$ from a planet. The radius of the sun is $R$. The temperature at which planet radiates the energy is

4. Two stones are projected with the same speed but making different angles with the horizontal. Their horizontal ranges are equal. The angle of projection of one is $\pi / 3$ and the maximum height reached by it is 102 metres. Then the maximum height reached by the other in metres is

5. If the over-bridge is concave instead of being convex, the thrust on the road at the lowest position will be

6. A liquid is allowed to flow into a cone shape pipe. Choose the correct option from the following.

7. Which of the following statements is correct?

8. What powered lens should be used for the correction of a myopic eye whose far point is $85 \,cm$?

9. If the radius of the earth is $R$ , then the height $h$ at which the value of $g$ becomes one-fourth, will be

12. A pulse is generated at lower end of a hanging rope of uniform density and length $L$. The speed of the pulse when it reaches the mid point of rope is

13. Two large thin metal plates are parallel and close to each other. On their inner faces, the plates have surface charge densities of opposite signs and magnitude $27 \times 10^{-22}\, C\, m^{-2}$. The electric field $\vec{E}$ in region $II$ in between the plates is

14. Internal energy of a gas remains unchanged in (I) an isothermal process (II) an adiabatic process (III) a reversible process (IV) a cyclic process Which of the these are true?

15. Among the following one is wrong

16. A small spherical ball falling through a viscous medium of negligible density has terminal velocity $v$. Another ball of the same mass but of radius twice that of the earlier falling through the same viscous medium will have terminal velocity

17. A coil of wire of a certain radius has $100$ turns and a self inductance of $15\, mH$. The self inductance of a second similar coil of $500$ turns will be

18. A network of four capacitors of capacity equal to $C_{1}=C, C_{2}=2 C, C_{3}=3 C$ and $C_{4}=4 C$ are connected to a battery as shown in the figure. The ratio of the charges on $C_{2}$ and $C_{4}$ is.:

20. If unpolarized light falls on a glass plate $\left(\mu=1.54\right)$ at an incidence angle of $57^{\circ}$, the reflected light is

21. Let $K_{1}$ and $K_{2}$ be the maximum kinetic energies of photo-electrons emitted when two monochromatic beams of wavelength $\lambda_{1}$ and $\lambda_{2}$, respectively are incident on a metallic surface. If $\lambda_{1}=3 \lambda_{2}$ then:

22. A logic gate whose output will be in logic 0 state only when all inputs are in logic 1 state is called

23. A proton and an $\alpha$-particle are accelerated from rest to the same energy. The de Broglie wavelengths $\lambda_{p}$ and $\lambda_{\alpha}$ are in the ratio,

24. When a small mass $m$ is suspended at lower end of an elastic wire having upper end fixed with ceiling. There is loss in gravitational potential energy, let it be $x$, due to extension of wire, mark correct option

25. Two point electric charges $+10^{-8} C$ and $-10^{-8} C$ are placed $0.1 \,m$ apart. Find the magnitude of Total Electric field at the center of the line joining the two charges.

26. A charge is moving across a junction, then

27. A particle of mass $m$ moves in a circular path radius $r$ under the action of a force $\frac{m v^{2}}{r}$. The work done during its motion over half of the circumference of the circular path will be

28. For long distance transmission, the $ac$ is stepped up because transmission at high voltage is :

29. Assertion :Diamonds are known for their spectacular brilliance, but diamonds found in nature rarely exhibit the brilliance Reason: By cutting the diamond suitably, multiple total internal reflections can be made to occur.

30. A coil has resistance $25.00 \Omega$. and $25.17 \Omega$ at $20^{\circ} C$ and $35^{\circ} C$ respectively. What is the temperature coefficient of resistance?

14. Internal energy of a gas remains unchanged in
(I) an isothermal process
(II) an adiabatic process
(III) a reversible process
(IV) a cyclic process
Which of the these are true?

29. Assertion :Diamonds are known for their spectacular brilliance, but diamonds found in nature rarely exhibit the brilliance
Reason: By cutting the diamond suitably, multiple total internal reflections can be made to occur.