Class 12th

Two long current carrying conductors are placed parallel to each other at a distance of 8 cm between them. The magnitude of magnetic field produced at mid-point between the two conductors due to current flowing in them is 300 $\mu T$ . the equal current flowing in the two conductors is

A capacitor is discharging through a resistor R. Consider in time t₁ the energy stored in the capacitor reduces to half of its initial value and in time t₂, the charge stored in the capacitor reduces to half of its initial value and in time t₂ the charge stored reduces to one eight of its initial value. The ratio t₁/t₂ will be

The electric field at a point associated with a light wave is given by

E = 200 $\left[sin\left(6*10^{15}\right)t+sin\left(9*10^{15}\right)t\right]V{m}^{-1}$

Given : h = 4.14 * 10^-15 eVs

If the light fall on a metal surface having a work function of 2.50 eV, the maximum kinetic energy of the photoelectrons will be

Let A = $\left\{Z\in C:\left|\frac{z+1}{z-1}\right|<1\right\}$and B = $\left\{z\in C:arg\left(\frac{z-1}{z+1}\right)=\frac{2\pi }{3}\right\}.$Then $A\cup B$ is

Let $\Delta ,\nabla \in \left\{\wedge ,\vee \right\}$ be such that $p\nabla q\Rightarrow \left(\left(p\Delta q\right)\nabla r\right)$ is a tautology. Then $\left(p\nabla q\right)\Delta r$ is logically equivalent to

The mean of the numbers a, b, 8, 5, 10 is 6 and their variance is 6.8. If M is the mean deviation of the numbers about the mean, then 25 M is equal to