For the following questions answer them individually
The three charges $$\frac{q}{2}, q$$ and $$\frac{q}{2}$$ are placed at the corners $$A, D$$ and $$C$$ of a square of side $$a$$ as shown in figure. The magnitude of electric field ($$E$$) at the corner $$B$$ of the square, is
An infinitely long hollow conducting cylinder with radius $$R$$ carries a uniform current along its surface. Choose the correct representation of magnetic field $$(B)$$ as a function of radial distance $$(r)$$ from the axis of cylinder.
The refracting angle of a prism is $$A$$ and refractive index of the material of the prism is $$\cot\left(\frac{A}{2}\right)$$. Then the angle of minimum deviation will be
The aperture of the objective is $$24.4$$ cm. The resolving power of this telescope, if a light of wavelength $$2440$$ Ã… is used to see the object will be
The de Broglie wavelengths for an electron and a photon are $$\lambda_e$$ and $$\lambda_p$$ respectively. For the same kinetic energy of electron and photon, which of the following presents the correct relation between the de Broglie wavelengths of two?
The $$Q$$-value of a nuclear reaction and kinetic energy of the projectile particle, $$K_p$$ are related as
In the following circuit, the correct relation between output ($$Y$$) and inputs $$A$$ and $$B$$ will be
For using a multimeter to identify diode from electrical components, choose the correct statement out of the following about the diode
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : $$n - p - n$$ transistor permits more current than a $$p - n - p$$ transistor.
Reason R : Electrons have greater mobility as a charge carrier.
Match List-I with List-II
| List-I | List-II |
|---|---|
| (A) Television signal | (I) 03 KHz |
| (B) Radio signal | (II) 20 KHz |
| (C) High Quality Music | (III) 02 MHz |
| (D) Human speech | (IV) 06 MHz |