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 …
MCQ on Junction Transistor Q1. The emitter-base junction of a transistor is ………. Biased while the collector-base junction is …………. Reverse, Forward Reverse, Reverse Forward, forward Forward, reverse Answer: (d) Forward, reverse Q2: A NPN transistor conducts when Both collector and emitter are positive with respect to the base Collector …
MCQ on Inductance Q1: Mutual inductance between two magnetically coupled coils depends on Permeability of the core material Number of turns of the coils The cross-sectional area of their common core All of the above Answer: (d) All of the above Q2: What will be the inductance if the iron …
MCQ on Ac Generator Q1: An alternator is an electromechanical ac generator. True False Answer: (B) False Q2: In A.C generator increasing the no. of turns in the coil Decreases the Electromotive force (EMF) Electromotive force (EMF) remains the same Increases the Electromotive force (EMF) Electromotive force (EMF) becomes zero …
MCQ on Voltage Regulator Q1: Which of the following is considered as three-pin voltage regulator ICs? Voltage regulators which are adjustable Fixed voltage regulator Both a and b Answer: (c) Both a and b Q2: Which type of IC voltage regulator there is a continuous variation in the impedance of …
MCQ on Mass Defect Q1: If the radius of the 13Al27 nucleus is taken to be RAl then the radius of 53Te125 nucleus is nearly (53/13)1/3RAl 5/3 RAl ⅗ RAl (13/53) ⅓ RAl Answer: (b) 5/3 RAl Q2: A nucleus of uranium decays at rest into nuclei of thorium and …
MCQ on Keplers Law Q1: When a planet orbits the Sun, one of the foci of the elliptical orbit is The axis The perihelion The centre The Sun Answer: (d) The Sun Q2: What has an eccentricity of zero? A straight line A large ellipse A circle A small ellipse …