A galvanometer of resistance G is converted into a voltmeter
A galvanometer of resistance G is converted into a voltmeter of range 0 – 1V by connecting a resistance R1... View Article
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A solid sphere of radius R carries a charge Q + q
A solid sphere of radius R carries a charge Q + q distributed uniformly over its volume. A very small... View Article
In a resonance tube experiment when the tube is filled with water
In a resonance tube experiment when the tube is filled with water up to a height of 17.0 cm from... View Article
A hollow spherical shell at outer radius R floats just submerged under the water surface.
A hollow spherical shell at outer radius R floats just submerged under the water surface. The inner radius of the... View Article
The value of the acceleration due to gravity is g1 at a height h
The value of the acceleration due to gravity is g1 at a height h = R / 2 (R =... View Article
Activities of three radioactive substances A, B and C are represented by the curves A, B and C, in the figure.
Activities of three radioactive substances A, B and C are represented by the curves A, B and C, in the... View Article
An electrical power line, having a total resistance of 2Ω, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately:
1) 72% 2) 91 % 3) 85% 4) 96% Answer: (4) = {[Pout] / [Pout + Ploss]} * 100 I... View Article
A balloon is moving up in air vertically above a point A on the ground
A balloon is moving up in air vertically above a point A on the ground. When it is at a... View Article
A wheel is rotating freely with an angular speed on a shaft.
A wheel is rotating freely with an angular speed on a shaft. The moment of inertia of the wheel is... View Article
A bullet of mass 5 g, travelling with a speed of 210 m/s, strikes a fixed wooden target.
A bullet of mass 5 g, travelling with a speed of 210 m/s, strikes a fixed wooden target. One half... View Article
A helicopter rises from rest on the ground vertically upwards with a constant acceleration g.
A helicopter rises from rest on the ground vertically upwards with a constant acceleration g. A food packet is dropped... View Article
Two capacitors of capacitances C and 2C are charged to potential differences V and 2V
Two capacitors of capacitances C and 2C are charged to potential differences V and 2V, respectively. These are then connected... View Article
Assume that the displacement (s) of air is proportional to the pressure difference
Assume that the displacement (s) of air is proportional to the pressure difference (Δp) created by a sound wave. Displacement(s)... View Article
A square loop of side 2a, and carrying current I
A square loop of side 2a, and carrying current I, is kept in XZ plane with its centre at the... View Article
With increasing biasing voltage of a photodiode, the photocurrent magnitude
1) increases initially and saturates finally 2) remains constant 3) increases linearly 4) increases initially and after attaining certain value,... View Article
Three different processes that can occur in an ideal monatomic gas are shown in the P vs V diagram
Three different processes that can occur in an ideal monatomic gas are shown in the P vs V diagram. The... View Article
Let tan α, tan β and tan γ; α, β, γ ≠ [2n – 1] π / 2, n ∈ N be the slopes of three-line segment
Let tan α, tan β and tan γ; α, β, γ ≠ [2n – 1] π / 2, n ∈ N be... View Article
Let P be an arbitrary point having the sum of the squares of the distances
Let P be an arbitrary point having the sum of the squares of the distances from the planes x +... View Article
If 1, log10 (4x – 2) and log10 [4x + (18 / 5)] are in arithmetic progression for a real number x
If 1, log10 (4x – 2) and log10 [4x + (18 / 5)] are in arithmetic progression for a real... View Article
Consider a set of 3n numbers having variance 4.
Consider a set of 3n numbers having variance 4. In this set, the mean of the first 2n numbers is... View Article
