MCQs on Ray Optics What is the distance between two convex lenses LA and LB with focal lengths FA and FB? FA+FB FA-FB FA FB Answer: (a) FA+FB If a medium has a critical angle for total internal reflection from the medium to vacuum as 300, what is the velocity …
PHYSICS MCQs
MCQs on Surface Tension Q1: When there are no external forces, the shape of a liquid drop is determined by Surface Tension of the liquid The density of the liquid The viscosity of the liquid The temperature of air only Answer: (a) Surface Tension of the liquid Q2: If T …
MCQs on Ohms law Q1: If a current of 5 Amperes flows through the conductor. The number of electrons per second will is 1.6 x 10-19 3.12 x 1019 4 x 1019 7.68 x 1020 Answer: (b) 3.12 x 1019 Q2: Ohm’s law is true for Metallic conductors at low …
MCQs on Dielectrics Q1: Which among the following is a dielectric? Copper Aluminium Plastic Ceramic Answer: (d) Ceramic Q2: How can a dielectric be converted to a conductor? Compression Heating Expanding Freezing Answer:(b) Heating Q3: Which of the following statements is true for a dielectric? Dielectrics are superconductors at high …
MCQs on Electric flux Q1: What is the value of total flux through the faces of the cube with the sides of length a if a charge Q is placed at corner A of the cube is q/ε0 q/2ε0 q/4ε0 q/8ε0 Answer: (d) q/8ε0 Q2: If a unit positive charge …
MCQs on Mirror Formula Q1: A convex mirror of focal length f forms an image which is 1/n times the object. The distance of the object from the mirror is (n-1)f (n-1/n) f (n+1/n) f (n+1) f Answer: (a) (n-1)f Q2: Consider a concave mirror of focal length 50 cm. …
MCQs on Moving Coil Galvanometer Q1: The deflection θ is related to the electric current I in a galvanometer by the relation I ∝ θ I ∝ tan θ I ∝ sin θ I ∝ cos θ Answer: (a) I ∝ θ Q2: A moving coil galvanometer carries a current …
MCQs on Waves Optics Q1: Polarisation phenomenon explains which nature of light? Transverse longitudinal Both transverse and longitudinal geometrical Answer: (a) Transverse Q2: A narrow slit is taken and a parallel beam of moving electrons is incident normally on it. At a larger distance from the slit, a fluorescent screen …
MCQs on Prism theory and Dispersion of light Q1: The critical angle between an equilateral prism and air is 45. If the incident ray is perpendicular to the refracting surface, then It is reflected totally from the second surface and emerges perpendicular from the third surface. It gets reflected from …
MCQs on Electromagnetic Spectrum Q1: Which of the following has a minimum wavelength? Gamma rays Blue light Infrared rays microwave Answer: (a) Gamma rays Q2: Which among the following has the maximum penetrating power? Radio waves Microwaves Ultraviolet radiation Gamma rays Answer: (d) Gamma rays Q3: Which of the following …
MCQs on Perfectly Inelastic Collision Q1: The coefficient of restitution e for a perfectly inelastic collision is 1 0 Infinity -1 Answer:(b) 0 Q2: When two bodies stick together after the collision, the collision is said to be Partially elastic collision Totally elastic collision Totally inelastic collision None of the …
MCQs on Work Done by Variable Force Q1: There are two springs with the force constant as k1 and k2 (k1＞k2). They are stretched by the same force then More work is done in the first spring In both springs equal work is done In the second spring, more work …
MCQs on Uniform Circular Motion Q1: The angular velocity of a body moving with a constant speed v in a circle of radius r is given by v2/r vr v/r r/v Answer: (c) v/r Q2: A cyclist turns around a curve at 15 miles/hour. If he turns at double the …
MCQs on Horizontal Projectile Motion Q1: A stone is just released from the window of a train moving along a horizontal straight track. The stone will hit the ground following Hyperbolic path Straight path Circular path Parabolic path Answer: (d) Parabolic path Q2: A bullet is dropped from the same …
MCQs on Optical Instrument Q1: A lens which converges a beam of parallel rays to a point is called Diverging (or concave) lens Converging (or convex) lens Plano concave lens Plano-convex lens Answer: (b) Converging (or convex) lens Q2: The diameter of a lens is called Focal length Principle axis …
MCQs on Logic Gates Q1: An inverter gates can be developed using Two diodes Resistance and capacitance Transistor Inductance and capacitance Answer: (c) Transistor Q2: The output of the two-input OR gate is high Only if both inputs are high Only if both inputs are low Only if one input …
MCQs on Semiconductor Diode Q1: In the forward bias arrangements of a PN junction diode The N end is connected to the positive terminal of the battery The P end is connected to the positive terminal of the battery The direction of the current is from N end to the …
MCQs on Bipolar Junction Transistor Q1: For a transistor to operate in an active region what is the essential possible condition of biasing? Collector-base and emitter-base junctions are reverse biased. Collector-base junction is reverse biased and the emitter-base is forward biased Collector-base and emitter-base junctions are forward biased Collector-base junction …
MCQs on Photodiode Q1: Photodiode is used in the detection of Visible light Invisible light No light Both visible and invisible light Answer: (d) Both visible and invisible light Q2: In using a photodiode as a photodetector, it is invariably reverse biased The power consumption is much reduced compared to …
MCQs on PN Junction Diode Q1: In a PN junction with no external voltage, the electric field between acceptor and donor ion is called a Peak Barrier Threshold Path Answer: (b) Barrier Q2: In a PN junction the potential barrier is due to the charges on either side of the …
MCQ on Series and Parallel Circuits Q1: A certain circuit is composed of two parallel resistors. The total resistance is 1,403 Ω. One of the resistors is 2 Ω. The other resistor value is 1,403 Ω 4.7 kΩ 2 kΩ 3,403 Ω Answer: (b) 4.7 kΩ Q2: A voltage divider …