List of practice Questions

A projectile is fired with an initial speed of 40 m/s at an angle of 30° with the horizontal. What is the maximum height it reaches?
A ball projected vertically upwards with velocity 'v' passes through a point P in its upward journey in a time of 'x' seconds. Then, the time in which the ball again passes through the same point P is
If the height of a projectile at a time of 2 s from the beginning of motion is 60 m, then the time of flight of the projectile is (Acceleration due to gravity = 10 m/s\(^2\))
The equation of trajectory of a projectile is given by \( y = x - 10x^2 \). Its speed of projection is – \((g = 10 \, \text{m/s}^2)\)
Find the magnetic field inside a solenoid having number of turns 7000, length 1m, and current 1 A.
What is the path followed by a charge entering a uniform magnetic field with its initial velocity along the direction of the magnetic field?
The region surrounding a magnet in which the influence of that magnet can be detected is called
If the electric current through a copper wire increases, the magnitude of the magnetic field produced at a given point:
The magnetic field at all points inside a solenoid carrying electric current:
The magnetic field produced by a current carrying circular loop is strongest at
If \( A \) is the set of odd numbers less than 6 and \( B \) is the set of prime factors of 30, then:
If \( A = \{1, 2, 3, 4, 5\} \) and \( B = \{1, 3, 5, 7\} \), then \( n(A \cap B) = \dots \):
Which of the following mirrors is used by a dentist to examine a patient's teeth?
There is no accumulation of electric charges at any junction in an electric circuit. Which law states this?

A straight conductor carries a current of 10 A. The magnetic field at a distance of 2 cm from the wire is: (μ₀ = 4 × 10⁻⁷ T m/A)

A coil of 100 turns and area 0.01 m² is placed perpendicular to a uniform magnetic field that increases uniformly from 0 to 0.2 T in 0.1 s. What is the magnitude of the induced EMF in the coil?
What is the angle between the current and the magnetic field if a conductor carrying 2A current placed in a magnetic field of 4T experiences a force of 10N?
The ratio of the velocity of light in a vacuum to that in a medium is?
The velocity of light through a medium of relative permittivity 2 and relative permeability 4.5 is (in terms of $ c $):
Chromatic aberration arises in their lens due to:
A light is incident on a surface having refractive index $ \frac{4}{3} $ and reflected light is completely polarised. $ \left( \tan 53^\circ = \frac{4}{3} \right) $. What is the angle of incidence?

Which of the following cranial nerves is responsible for the motor innervation of the muscles of mastication?

Electrostatic force is maximum when charge \( Q \) is placed at ------?
The inward electric flux through a closed surface is \( 6 \times 10^{-5} \) and the outward flux is \( 3 \times 10^{-5} \). Then the total charge enclosed is?
Three particles of each charge $q$ are placed at the vertices of an equilateral triangle of side $L$. The work to be done to decrease the side of the triangle to $\dfrac{L{2}$ is}