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The value of Planck's constant is
Measuring Zeta potential is useful in determining which property of colloidal solution?
Dimensional formula of capacitance is:
A non-reducing sugar among the following is:
The force $F$ on a sphere of radius ‘$a$’ moving in a medium with velocity ‘$v$’ is given by $F = 6\pi\eta av$. The dimensions of $\eta$ are:
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy $75\%$ of octahedral voids. The formula of the compound is :
Four point charges -Q, -q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q for which the potential at the centre of the square is zero, is
Which one of the following does not have the same dimensions?
Which one of the following compounds will be most readily dehydrated?
A parallel plate condenser has a uniform electric field E (V/m) in the space between the plates. If the distance between the plates is d (m) and area of each plate is A (m²), the energy (joule) stored in the condenser is:
The Earth Summit held in Rio de Janeiro in 1992 was called
Four electric charges +q, +q, -q and -q are placed at the corners of a square of side 2L (see figure). The electric potential at point A, mid-way between the two charges +q and +q, is
Which of the following represents a volt?
Tesla is a unit for measuring:
A series combination of n₁ capacitors, each of value C₁, is charged by a source of potential difference 4V. When another parallel combination of n₂ capacitors, each of value C₂, is charged by a source of potential difference V, it has the same (total) energy stored in it as the first combination has. The value of C₂ in terms of C₁ is:
Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC equal to 2a. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is:
The main scale of a vernier calliper has $n$ divisions/cm. $n$ divisions of the vernier scale coincide with $(n-1)$ divisions of the main scale. The least count of the vernier calliper is:
$X = 3YZ^2$, find the dimension of $Y$ in (MKSA) system, if $X$ and $Z$ are the dimensions of capacity and magnetic field respectively.
The mean free path of electrons in a metal is 4 × 10⁻⁸ m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in a unit of V m⁻¹:
If we study the vibration of a pipe open at both ends, then which of the following statements is not true: