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Physics Questions

Physics Questions

1. A particle is moving in a circle with uniform speed. Its motion is

NTA Abhyas 2020 Oscillations

2. Four point + ve charges of same magnitude $(Q)$ are placed at four corners of a rigid square frame as shown in figure. The plane of the frame is perpendicular to $Z$ axis. If a -ve point charge is placed at a distance $z$ away from the above frame $(z \ll L)$ then

Electric Charges and Fields

3. Consider a thermodynamic cycle in a $P V$ diagram shown in the figure performed on one mole of a monatomic gas. The temperature at $A$ is $T_0$ and volume at $A$ and $B$ are related as $V_B=V_C=2 V_A$ Choose the correct option(s) from the following.

Thermodynamics

4. In the expression $A=A_0 e^{-a / k T}, k$ is Boltzmann constant and $T$ is the absolute temperature. The dimensions of $a$ are the same as those of

Physical World, Units and Measurements

5. Assertion (A): The intensity at a point of destructive interference is zero.
Reason (R): At destructive interference, the amplitudes of waves cancel each other.

Wave Optics

6. A block is sliding up a rough slope as shown. The angle between the force of kinetic friction acting on the block and the force of gravity acting on the block is:

Laws of Motion

7. In Young's double slit experiment the two slits are d distance apart. Interference pattern is observed on a screen at a distance D from the slits. A dark fringe is observed on the screen directly opposite to one of the slits. The wavelength of light is

Wave Optics

8. An ammeter reads up to $1$ ampere. Its internal resistance is $0.81\, ohm$. To increase the range to $10\, A$ the value of the required shunt ( in ohm) is

KCET 2022

9. Two uniform solid spheres of masses $M$ and $4M$ but of equal radii $R$ , have a centre to centre separation $6R$ , as depicted in the figure. A projectile of mass $m$ is projected from the surface of the sphere of mass $M$ directly towards the center of the second sphere. What should be the minimum speed of projection so that it reaches the surface of the second sphere?
Question

NTA Abhyas 2020

10. The relative permeability is represented by $\mu_{ r }$ and susceptility is denoted by $\chi$ for a magnetic substance. For a paramagnetic substance :-

Moving Charges and Magnetism

11. If the electron in the hydrogen atom jumps from third orbit to second orbit, the wavelength of the emitted radiation in term of Rydberg constant is

VITEEE 2014 Atoms

12. Assertion: Photodiode and photovoltaic cell are based on the same principle.
Reason: Both use same method of operations to work.

AIIMS 2011 Semiconductor Electronics: Materials Devices and Simple Circuits

13. The temperature coefficient of resistance of a coil is $ 0.01{}^\circ C $ . If the resistance of the coil at $ 0{}^\circ C $ is 10 $ 10\,\Omega $ its resistance at $ 100{}^\circ C $ is:

JIPMER 1997

14. A Carnot engine has same efficiency between (i) $100\, K$ and $500\, K$, (ii) $T K$ and $900\, K$. The value of $T$ is

Thermodynamics

15. A $1.0 kg$ block of wood sits on top of an identical block of wood, which sits on top of a flat level table made of plastic. The coefficient of static friction between the wood surfaces is $\mu_1$, and the coefficient of static friction between the wood and plastic is $\mu_2$. A horizontal force F is applied to the top block only, and this force is increased until the top block starts to move. The bottom block will move with the top block if and only if

Laws of Motion

16. A stone falls freely from rest from a height $h$ and it travels a distance — in the last second. The value of $h$ is

KEAM 2011

17. Two nuclei have their mass numbers in the ratio of $ 1:3 $ . The ratio of their nuclear densities would be

Maharashtra CET 2008

18. In Young's double slit experiment, on interference, ratio of intensities of a bright band and a dark band is $16: 1$. The ratio of amplitudes of interfering waves is

Wave Optics

19. A square wire of each side $l$ carries a current $I .$ What is the magnetic field at the midpoint of the square?
image

Moving Charges and Magnetism

20. The surface tension and vapour pressure of water at $ 20{}^\circ C $ is $ 7.28\times {{10}^{-2}}N{{m}^{-1}} $ and $ 2.33\times {{10}^{3}}Pa $ respectively. The radius of the smallest spherical droplet which can form without evaporating is

MGIMS Wardha 2015

21. A particle executing simple harmonic motion.The amplitude of the particle is $A$ . In one time period the distance travelled by the particle is

NTA Abhyas 2020

22. Two magnets $A$ and $B$ are identical and these are arranged as shown in the figure. Their length is negligible in comparison to the separation between them. A magnetic needle is placed between the magnets at point $P$ which gets deflected through an angle $\theta$ under the influence of magnets. The ratio of distance $d_1$ and $d_2$ will be

Magnetism and Matter

23. In the given circuit the reading of voltmeter $V_1$ and $V_2$ are $300$ volts each. The reading of the voltmeter $V_3$ and ammeter $A$ are respectively

AIPMT 2010 Alternating Current

24. A point object is placed at a distance of $80 \mathrm{~cm}$ from convex mirror of focal length $80 \mathrm{~cm}$. The image will form at

AIE 1 2023

25. The temperature at which the mean KE of the molecules of gas is one-third of the mean KE of its molecules at $ 180{}^\circ C $ is

MGIMS Wardha 2010

26. A stone is dropped from a certain height which can reach the ground in 8 sec . It is stopped after three seconds of its fall and then is again released. The total time taken by the stone to reach the ground will be ( $g=10 m / s ^2$ )

Motion in a Straight Line

27. In this type of questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion : The capacity of a conductor, under given circumstances, remains constant irrespective of the charge present on it.
Reason : Capacity depends on size and shape of conductor and also on the surrounding medium.

Electrostatic Potential and Capacitance

28. Centripetal acceleration is

Motion in a Plane

29. An engineer works at a factory out of town. A car is sent for him from the factory every day and arrives at the railway station at the same time as the train. One day the engineer arrived at the station one hour before his usual time and without waiting for the car, started walking towards factory. On his way he met the car and reached his factory $10$ minutes before the usual time. For how much time (in minutes) did the engineer walk before he met the car? (The car moves with the same speed everyday.)

Motion in a Straight Line

30. Given $x=Ay+B \tan\left(C z\right)$ , where $x,y,z$ are physical quantities while $A,B,C$ are constants. Then ___ and ___ do not have the same dimensions. Fill in the blanks.

NTA Abhyas 2022