Angular width of interference fringe depends on (A) Distance Between Slit and Screen (B) Ratio of the wavelength and Slit width (C) Wavelength of light (D) Width of Slit

Five resistances are combined according to the figure. The equivalent resistances between the points X and Y will be (a) 10 Ω (b) 22 Ω (c) 20 Ω (d) 50 Ω

If the width of the slit in single slit diffraction experiment is doubled, then the central maximum of diffraction pattern becomes: (A) broader and brighter (B) broader and fainter (C) sharper and fainter (D) sharper and brighter

In a double slit interference pattern, the first maxima for infrared light would be (a) at the same place as the first maxima for green light (b) closer to the centre than the first maxima for green light (c) farther from the centre than the first maxima for green light (d) infrared light does not produce an interference pattern

In a Wheatstone bridge, three resistors P,Q, R are connected in three arms in order and 4th arm of resistance, s, is formed by two resistors s1 and s2 connected in parallel. The condition for bridge to be balanced is, P/Q

In a Young’s double slit experiment, the separation between the slits is 0.1 mm, the wavelength of light used is 600 nm and the interference pattern is observed on a screen 1 m away. Find the separation between bright fringes. (A) 6.0 mm (B) 6.6 mm (C) 6 m (D) 60 cm

In the Young double slit experiment, the fringe pattern as seen on the screen is: (A) Parabola (B) Hyperbola (C) Ellipse (D) Spiral

Length of a hollow tube is 5 m, its outer diameter is 10 cm and thickness of its wall is 5 mm. If resistivity of the material of the tube is 1.7 x 10⁻⁸ Ωm, then the resistance of the tube will be (a) 5.6 × 10⁻⁵ Ω (b) 2 × 10⁻⁵ Ω (c) 4 × 10⁻⁵ Ω (d) None of these

The force between two charges, when placed in free space, is 5N. if they are in a medium of relative permittivity 5, the force between them will be A. 1N B. 25N C. 2.5N D. 1/5N

The light sources used in Young’s double slit experiment are: (A) Incoherent (B) Coherent (C) White light (D) Blue-green-red Light.

The magnetic flux linked with a coil is given by an equation Φ = 5t² + 2t + 3. The induced e.m.f. in the coil at the third second will be (A) 32 units (B) 54 units (C) 40 units (D) 65 units

the magnitude of a charge q at the center of two equal and like charges Q so that the three charges are in equilibrium A. Q B. Q/2 C. Q/4 D. –Q/4

The speed of light in air is 3 × \(10^8\) m/s. If the refractive index of glass is 1.5, find the time taken by light to travel a distance 50 cm in glass. (a) 2.5 × \(10^{-9}\) sec. (b) 0.5 × \(10^{-9}\) sec. (c) 0.16 × \(10^{-9}\) sec. (d) 3 × \(10^{-9}\) sec.

The V-i graph for a conductor at temperature T¹ and T² are as shown in the figure. (T² - T¹) is proportional to (a) cos θ (b) sin θ (c) cot 2θ (d) tan θ

The wave-front due to source situated at the infinity is (A) Spherical (B) Cylindrical (C) Plane (D) Rectangular