MOCK TEST-1 Questions
Water flows through a horizontal pipe. At a point where the speed of water is v, the pressure is P. At another point where the speed is 2v, the pressure will be (density of water = ρ):
Three wires of the same dimensions (length and area) are subjected to the same load. If their elongations are x, 2x, and 3x respectively, the ratio of their Young's modulii is:
An electron enters a magnetic field at an angle of 60° to the field lines. The path of the electron is:
A student is standing in front of "three mirrors stacked one over the other vertically". He observes that his head appears of the same size, the middle part of his body appears smaller, and his legs appear of the same size. What is the sequence of th
The resonant frequency of a series LCR circuit with L = 2.0 H, C = 32 μF and R = 10 Ω is nearest to:
A wire of resistance R is stretched to twice its original length. This stretched wire is then compressed to 1/4 of its new length. What is the final resistance of the wire? (the deformations are uniform)
A force F = (3i + 4j) N acts on a particle moving from the coordinate (0,0) to (2m,2m). The work done by the force is:
The equivalent capacitance between points A and B in a series combination of three capacitors C, 2C, and 3C is:
The work function of a metal is 4.2 eV. If light of wavelength 2000 Å falls on it, the maximum kinetic energy of the emitted photoelectrons is (take hc ≈ 12400 eV Å):
Two balls, A and B, are projected simultaneously from two points on the same level horizontal ground. Ball A is projected with speed u₁ at an angle θ₁ with the horizontal, and Ball B is projected towards A with speed u₂ at an angle θ₂ with the horizo
A cube of edge length l is placed in a region of uniform horizontal electric field of magnitude E. Initially, as shown in Figure (a), one pair of opposite faces of the cube is perpendicular to the electric field lines. The cube is then rotated by an
The percentage error in the measurement of mass and speed of a body are 2% and 3% respectively. What is the maximum percentage error in the estimation of kinetic energy?
Given below are two statements: Statement I: The value of the proportionality constant K in Kepler's Third Law (T² ∝ R³) is the same for the Moon revolving around the Earth and for the Earth revolving around the Sun. Statement II: The constant K in K
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: When temperature difference across the two sides of a wall is increased, its thermal conductivity increases. Reason R: Thermal conducti
Two large, parallel conducting plates, labeled I and II, are given charges of +Q and +2Q respectively. When placed close to each other, what is the charge on the inner surface of Plate I (the surface facing Plate II)?
A student performs an experiment with three unknown objects: X, Y, and Z. Object X repels a glass rod that has been rubbed with silk. Object Z repels a plastic ruler that has been rubbed with dry hair. Object Y is attracted to both Object X and Objec
A bar magnet oscillates in a uniform magnetic field with a potential energy of U. It is cut perpendicular to its length into two equal parts. These two pieces are then stacked one over another with like poles together. The potential energy of the new
The escape velocity from the surface of earth is vₑ. If a planet has a mass twice that of earth and a radius half that of earth, the escape velocity from the surface of this planet will be:
A rod with cross-section A = 2.0 cm² is placed in a magnetizing field H = 10⁵/(4π) A m⁻¹. The magnetic flux through the rod is Φ = 1.0 × 10⁻⁵ Wb. The magnetic susceptibility χ of the material is (use μ₀ = 4π × 10⁻⁷ H m⁻¹):
A point object O placed in air lies on the principal axis of a convex spherical surface of radius of curvature R. The surface separates air (μ₁ = 1) from a glass medium (μ₂ = 1.5). The object is placed at a distance of 3R from the pole of the surface
The logic gate represented by the following truth table is: