List of top Physics Questions

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion (A): Range of a horizontal projectile is maximum when angle of projection is $θ = 45°$.
Reason (R): Range is maximum when $sin\ (2θ)=1$.
In the light of the above statements, choose the correct answer from the options given below

Match List I with List II :

	List I		List II
A	3 Translational degrees of freedom	I	Monoatomic gases
B	3 Translational, 2 rotational degrees of freedoms	II	Polyatomic gases
C	3 Translational, 2 rotational and 1 vibrational degrees of freedom	III	Rigid diatomic gases
D	3 Translational, 3 rotational and more than one vibrational degrees of freedom	IV	Nonrigid diatomic gases

Choose the correct answer from the options given below:

A rectangular conducting loop of length 4 cm and width 2 cm is in the X-Y plane. It is being moved away from a thin and long conducting wire along the direction ($\frac{\sqrt3}{2}\hat{x}+\frac{1}{2}\hat{y}$) with constant speed v. The wire is carrying a steady current I = 10 A in the +ve X- direction. A current of 10 μA flows through the loop when it is at a distance d = 4 cm from the wire. If the resistance of the loop is 0.1 $\Omega$. Then the value of v is ........m/s

In an experiment on a circuit, as shown in the figure, the voltmeter shows 8V reading. The resistance of the voltmeter is

The ratio of radius of gyration of a solid sphere of mass M and radius R about its own axis to the radius of gyration of the thin hollow sphere of same mass and radius about its axis is:

The equivalent resistance between the points A and B in the following circuit is

Ten identical cells each emf 2V and internal resistance 1Ω are connected in series with two cells wrongly connected. A resistor of 10Ω is connected to the combination. What is the current through the resistor?

As shown in figure, a cuboid lies in a region with electric field $E=2 x^2 \hat{i}-4 y \hat{j}+6 \hat{k} N / C$. The magnitude of charge within the cuboid is $n \epsilon_0 C$. The value of $n$ is _____. (if dimension of cuboid is $1 \times 2 \times 3 m ^3$ )

A uniform electric field of $10 N / C$ is created between two parallel charged plates (as shown in figure) An electron enters the field symmetrically between the plates with a kinetic energy $05 eV$ The length of each plate is $10 cm$ The angle $(\theta)$ of deviation of the path of electron as it comes out of the field is ___ (in degree)

The minimum number of 2-input NAND gates required to implement the function F = (x'+y')(z+w) is

A metal wire has mass (0.4±0.002)g, radius (0.3±0.001)mm and length (5±0.02)cm. The maximum possible percentage error in the measurement of density will nearly be:

A body is moving with constant speed, in a circle of radius $10 m$ .The body completes one revolution in 4 s .At the end of 3 rd second, the displacement of body (in mi) from its starting point is :

Young’s modulus of elasticity 𝑌 is expressed in terms of three derived quantities, namely, the gravitational constant 𝐺, Planck’s constant ℎ and the speed of light 𝑐, as 𝑌 = 𝑐^𝛼ℎ^𝛽𝐺^𝛾. Which of the following is the correct option?

A person of height 1.6 m is walking away from a lamp post of height 4 m along a straight path on the flat ground. The lamp post and the person are always perpendicular to the ground. If the speed of the person is 60 cm s^−1, the speed of the tip of the person’s shadow on the ground with respect to the person is _______ cm s^−1.

In an experiment for determination of the focal length of a thin convex lens, the distance of the object from the lens is 10 ± 0.1 cm and the distance of its real image from the lens is 20 ± 0.2 cm. The error in the determination of focal length of the lens is 𝑛 %. The value of 𝑛 is ____ .

Match List I with List II

Match List I with List II:

List - I		List - II
A.	Torque	I.	kg m^-1 s^-2
B.	Energy Density	II.	kg ms^-1
C.	Pressure gradient	III.	kg m^-2 s^-2
D.	Impulse	IV.	kg m² s^-2

Choose the correct answer from the options given below :

The velocity of a particle having a magnitude of 10 ms^-1 in the direction of 60° with positive X-axis is

Expression for an electric field is given by $\overrightarrow{ E }=4000 x^2 i \frac{ V }{ m }$ The electric flux through the cube of side $20 cm$ when placed in electric field (as shown in the figure) is ___$V cm$

A ball falls freely from a height h on a rigid horizontal plane. If the coefficient of resolution is e, then the total distance travelled by the ball before hitting the plane second time is:

The current in a coil changes from 2A to 5A in 0.3s. The magnitude of emf induced in the coil is 1.0V. The value of self-inductance of the coil is

When a spring is stretched by x amount, the potential energy stored in it is E. When the spring is stretched by another x amount, the potential energy stored in the spring becomes E'. Then $\frac{E'}{E}$ is,

The intensity of gravitational field of earth is maximum at the _______

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential

The horizontal component of the earth’s magnetic field can be represented as

List I (Current configuration)	List II(Magnetic field at point O)
A	i	\(B_0=\frac{\mu_0I}{4\pi r}[\pi+2]\)
B	ii	\(B_0=\frac{\mu_0}{4}\frac{I}{r}\)
C	iii	\(B_0=\frac{\mu_0I}{2\pi r}[\pi-1]\)
D	iv	\(B_0=\frac{\mu_0I}{4\pi r}[\pi+1]\)