Physics Question and Answers

1. Two vectors $P$ and $Q$ are given in space as $P =2 \hat{ i }-3 \hat{ j }+\hat{ k }$ and $Q =-4 \hat{ i }+6 \hat{ j }-2 \hat{ k }$. The angle between $P$ and $Q$ is

System of Particles and Rotational Motion

2. The maximum kinetic energy of emitted photoelectrons depends on

NTA Abhyas 2022

3. A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is $\vec{F}$ .the net force on the remaining three arms of the loop is

AIPMT 2010 Moving Charges and Magnetism

4. A particle moving with uniform acceleration has average velocities $v_{1}, v_{2}$ and $v_{3}$ over the successive intervals of time $t_{1}, t_{2}$ and $t_{3}$ respectively. The value of $\frac{\left(v_{1}-v_{2}\right)}{\left(v_{2}-v_{3}\right)}$ will be

Motion in a Straight Line

5. The coefficient of volume expansion of glycerine is $49 \times 10^{-5}{ }^{\circ} C ^{-1}$. What is the fractional change in density for a $30^{\circ} C$ rise in temperature?

Thermal Properties of Matter

6. In which process P-V diagram is a straight line parallel to the volume axis?

Thermodynamics

7. In a radioactive sample, there are $1.414\times 10^{6}$ active nuclei. If they are reduced to $10^{6}$ within $10min$ , then the half life of this sample will be,

NTA Abhyas 2022

8. What will be the ratio of temperatures of sun and moon, if the wavelengths of their maximum emission radiations rates are $140\,\mathring{A}$ and $4200\ ,\mathring{A}$ respectively?

J & K CET 2004

9. $ _{87}^{221} $ undergoes radioactive decay with a half-life of $4$ days. The probability that a $Ra$ nucleus will disintegrate in $8$ days is

Jharkhand CECE 2015

10. A 3cm long copper wire is stretched , to increase its length by 0.3 cm . find the lateral strain in the wire, if the Poisson's ratio for is 0.26.

Mechanical Properties of Solids

11. For the study of the helical structure of nucleic acids, the property of electromagnetic radiation, generally used is:

EAMCET 2005 Wave Optics

12. Current through $ABC$ and $A'B'C'$ is $I$. What is the magnetic field at $P? BP = PB' = r$ (Here $C'B' \,PBC$ are collinear)

WBJEE 2011 Moving Charges and Magnetism

13. A particle of mass $1 kg$ is undergoing $S.H.M$, for which graph between force and displacement (from mean position) is shown. Its time period, in seconds, is:

Oscillations

14. A capacitor of $8\,F$ is connected as shown. Charge on the plates of the capacitor

KCET 2016 Electrostatic Potential and Capacitance

15. In a hypothetical system, a particle of mass $m$ and charge $-3 q$ is moving around a very heavy particle charge $q$. Assume that Bohr's model is applicable to this system, then velocity of mass $m$ in the first orbit is

Atoms

16. A cubical block of side L rests on a rough horizontal surface with coefficient of friction $\mu$. A horizontal force F is applied on the block as shown. If the coefficient of friction is sufficiently high, so that the block does not slide before toppling, the minimum force required to topple the block is

IIT JEE 2000 System of Particles and Rotational Motion

17. Diamagnetic substances are the ones in which resultant magnetic moment in an atom is

Magnetism and Matter

18. Assertion : A man in a closed cabin which is falling freely does not experience gravity.
Reason : Inertial and gravitational mass have equivalence.

AIIMS 2006 Gravitation

19. Dynamic resistance of a diode is given by

Semiconductor Electronics: Materials Devices and Simple Circuits

20. If a, b, c, d are inputs to a gate and $x$ is its output, then, as per the following time graph, the gate is:

NTA Abhyas 2022

21. A cubical block of side $a$ is moving with velocity $v$ on a horizontal smooth plane as shown. It hits a ridge at point O. The angular speed of the block after is hits $O$ is

System of Particles and Rotational Motion

22. If $I$ is the moment of inertia of a rigid diatomic molecule, then calculate the angular mean square velocity of a rotating molecule in the gas sample, if the temperature is $T$ . ( $k$ =Boltzmann constant)

NTA Abhyas 2020

23. On observing light from three different stars $\text{P}$ , $\text{Q}$ and $\text{R}$ , it was found that intensity of violet colour is maximum in the spectrum of $\text{P}$ , the intensity of green colour is maximum in the spectrum of $\text{R}$ and the intensity of red colour is maximum in the spectrum of $\text{Q}$ . If $T_{p}, \, T_{Q}$ and $T_{R}$ are the respective absolute temperatures of $\text{P}$ , $\text{Q}$ and $\text{R}$ , then it can be concluded from the above observations that :

NTA Abhyas 2022

24. In nuclear forces between two protons, between two neutrons and between a proton and a neutron are $ f_{pp} $ . $ F_{nn} $ and $ f_{pn} $ respectively, then :

UPSEE 2005

25. A child is swinging a swing. Minimum and maximum heights of swing from earths surface are $ 0.75\,m $ and $2\,m $ respectively. The maximum velocity of this swing is

Punjab PMET 2009 Oscillations

26. To draw maximum current from a combination of cells, how should the cells be grouped?

NTA Abhyas 2022

27. If the 8th bright band due to light of wavelength $\lambda_{1}$ coincides with 9 th bright band from light of wavelength $\lambda_{2}$ in Young's double slit experiment, then the possible wavelengths of visible light are

Wave Optics

28. A carbon resistance has a following color code. What is the value of the resistance ? $( G =$ green, $O =$ orange, $Y =$ yellow $)$

AIE 3 2021

29. If a thin film of thickness $t$ and refractive index $\mu$ is placed in the path of light coming from a source $S$, then increase in length of optical path is :

Wave Optics

30. The minimum $NOR$ gates are required to make one $NAND$ gate are

NTA Abhyas 2020 Semiconductor Electronics: Materials Devices and Simple Circuits

Physics Questions

Physics Questions

1. Two vectors $P$ and $Q$ are given in space as $P =2 \hat{ i }-3 \hat{ j }+\hat{ k }$ and $Q =-4 \hat{ i }+6 \hat{ j }-2 \hat{ k }$. The angle between $P$ and $Q$ is

2. The maximum kinetic energy of emitted photoelectrons depends on

3. A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is $\vec{F}$ .the net force on the remaining three arms of the loop is

4. A particle moving with uniform acceleration has average velocities $v_{1}, v_{2}$ and $v_{3}$ over the successive intervals of time $t_{1}, t_{2}$ and $t_{3}$ respectively. The value of $\frac{\left(v_{1}-v_{2}\right)}{\left(v_{2}-v_{3}\right)}$ will be

5. The coefficient of volume expansion of glycerine is $49 \times 10^{-5}{ }^{\circ} C ^{-1}$. What is the fractional change in density for a $30^{\circ} C$ rise in temperature?

6. In which process P-V diagram is a straight line parallel to the volume axis?

7. In a radioactive sample, there are $1.414\times 10^{6}$ active nuclei. If they are reduced to $10^{6}$ within $10min$ , then the half life of this sample will be,

8. What will be the ratio of temperatures of sun and moon, if the wavelengths of their maximum emission radiations rates are $140\,\mathring{A}$ and $4200\ ,\mathring{A}$ respectively?

9. $ _{87}^{221} $ undergoes radioactive decay with a half-life of $4$ days. The probability that a $Ra$ nucleus will disintegrate in $8$ days is

10. A 3cm long copper wire is stretched , to increase its length by 0.3 cm . find the lateral strain in the wire, if the Poisson's ratio for is 0.26.

11. For the study of the helical structure of nucleic acids, the property of electromagnetic radiation, generally used is:

12. Current through $ABC$ and $A'B'C'$ is $I$. What is the magnetic field at $P? BP = PB' = r$ (Here $C'B' \,PBC$ are collinear)

13. A particle of mass $1 kg$ is undergoing $S.H.M$, for which graph between force and displacement (from mean position) is shown. Its time period, in seconds, is:

14. A capacitor of $8\,F$ is connected as shown. Charge on the plates of the capacitor

15. In a hypothetical system, a particle of mass $m$ and charge $-3 q$ is moving around a very heavy particle charge $q$. Assume that Bohr's model is applicable to this system, then velocity of mass $m$ in the first orbit is

17. Diamagnetic substances are the ones in which resultant magnetic moment in an atom is

18. Assertion : A man in a closed cabin which is falling freely does not experience gravity.
Reason : Inertial and gravitational mass have equivalence.

19. Dynamic resistance of a diode is given by

20. If a, b, c, d are inputs to a gate and $x$ is its output, then, as per the following time graph, the gate is:

21. A cubical block of side $a$ is moving with velocity $v$ on a horizontal smooth plane as shown. It hits a ridge at point O. The angular speed of the block after is hits $O$ is

22. If $I$ is the moment of inertia of a rigid diatomic molecule, then calculate the angular mean square velocity of a rotating molecule in the gas sample, if the temperature is $T$ . ( $k$ =Boltzmann constant)

24. In nuclear forces between two protons, between two neutrons and between a proton and a neutron are $ f_{pp} $ . $ F_{nn} $ and $ f_{pn} $ respectively, then :

25. A child is swinging a swing. Minimum and maximum heights of swing from earths surface are $ 0.75\,m $ and $2\,m $ respectively. The maximum velocity of this swing is

26. To draw maximum current from a combination of cells, how should the cells be grouped?

27. If the 8th bright band due to light of wavelength $\lambda_{1}$ coincides with 9 th bright band from light of wavelength $\lambda_{2}$ in Young's double slit experiment, then the possible wavelengths of visible light are

28. A carbon resistance has a following color code. What is the value of the resistance ? $( G =$ green, $O =$ orange, $Y =$ yellow $)$

29. If a thin film of thickness $t$ and refractive index $\mu$ is placed in the path of light coming from a source $S$, then increase in length of optical path is :

30. The minimum $NOR$ gates are required to make one $NAND$ gate are

Physics Questions

Physics Questions

1. Two vectors $P$ and $Q$ are given in space as $P =2 \hat{ i }-3 \hat{ j }+\hat{ k }$ and $Q =-4 \hat{ i }+6 \hat{ j }-2 \hat{ k }$. The angle between $P$ and $Q$ is

2. The maximum kinetic energy of emitted photoelectrons depends on

3. A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is $\vec{F}$ .the net force on the remaining three arms of the loop is

4. A particle moving with uniform acceleration has average velocities $v_{1}, v_{2}$ and $v_{3}$ over the successive intervals of time $t_{1}, t_{2}$ and $t_{3}$ respectively. The value of $\frac{\left(v_{1}-v_{2}\right)}{\left(v_{2}-v_{3}\right)}$ will be

5. The coefficient of volume expansion of glycerine is $49 \times 10^{-5}{ }^{\circ} C ^{-1}$. What is the fractional change in density for a $30^{\circ} C$ rise in temperature?

6. In which process P-V diagram is a straight line parallel to the volume axis?

7. In a radioactive sample, there are $1.414\times 10^{6}$ active nuclei. If they are reduced to $10^{6}$ within $10min$ , then the half life of this sample will be,

8. What will be the ratio of temperatures of sun and moon, if the wavelengths of their maximum emission radiations rates are $140\,\mathring{A}$ and $4200\ ,\mathring{A}$ respectively?

9. $ _{87}^{221} $ undergoes radioactive decay with a half-life of $4$ days. The probability that a $Ra$ nucleus will disintegrate in $8$ days is

10. A 3cm long copper wire is stretched , to increase its length by 0.3 cm . find the lateral strain in the wire, if the Poisson's ratio for is 0.26.

11. For the study of the helical structure of nucleic acids, the property of electromagnetic radiation, generally used is:

12. Current through $ABC$ and $A'B'C'$ is $I$. What is the magnetic field at $P? BP = PB' = r$ (Here $C'B' \,PBC$ are collinear)

13. A particle of mass $1 kg$ is undergoing $S.H.M$, for which graph between force and displacement (from mean position) is shown. Its time period, in seconds, is:

14. A capacitor of $8\,F$ is connected as shown. Charge on the plates of the capacitor

15. In a hypothetical system, a particle of mass $m$ and charge $-3 q$ is moving around a very heavy particle charge $q$. Assume that Bohr's model is applicable to this system, then velocity of mass $m$ in the first orbit is

17. Diamagnetic substances are the ones in which resultant magnetic moment in an atom is

18. Assertion : A man in a closed cabin which is falling freely does not experience gravity. Reason : Inertial and gravitational mass have equivalence.

19. Dynamic resistance of a diode is given by

20. If a, b, c, d are inputs to a gate and $x$ is its output, then, as per the following time graph, the gate is:

21. A cubical block of side $a$ is moving with velocity $v$ on a horizontal smooth plane as shown. It hits a ridge at point O. The angular speed of the block after is hits $O$ is

22. If $I$ is the moment of inertia of a rigid diatomic molecule, then calculate the angular mean square velocity of a rotating molecule in the gas sample, if the temperature is $T$ . ( $k$ =Boltzmann constant)

24. In nuclear forces between two protons, between two neutrons and between a proton and a neutron are $ f_{pp} $ . $ F_{nn} $ and $ f_{pn} $ respectively, then :

25. A child is swinging a swing. Minimum and maximum heights of swing from earths surface are $ 0.75\,m $ and $2\,m $ respectively. The maximum velocity of this swing is

26. To draw maximum current from a combination of cells, how should the cells be grouped?

27. If the 8th bright band due to light of wavelength $\lambda_{1}$ coincides with 9 th bright band from light of wavelength $\lambda_{2}$ in Young's double slit experiment, then the possible wavelengths of visible light are

28. A carbon resistance has a following color code. What is the value of the resistance ? $( G =$ green, $O =$ orange, $Y =$ yellow $)$

29. If a thin film of thickness $t$ and refractive index $\mu$ is placed in the path of light coming from a source $S$, then increase in length of optical path is :

30. The minimum $NOR$ gates are required to make one $NAND$ gate are

18. Assertion : A man in a closed cabin which is falling freely does not experience gravity.
Reason : Inertial and gravitational mass have equivalence.