Phy hssc-ii-a1
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This document appears to be the first section of a physics exam for HSSC-II students containing multiple choice questions. It covers topics in electricity, magnetism, semiconductors and basic circuit elements. The section is compulsory and must be completed in 25 minutes. It contains 17 questions testing concepts such as electric field, potential, resistivity, power, temperature coefficient of resistance, magnetic force on charges, energy bands, flux, back EMF, induced EMF, voltage in AC generators, definition of anode and cathode, representation of insulators, work done by stretched wire, depletion region width, what electromagnetic waves don't transport, current gain of a transistor, and what mutual induction plays a role in.
Phy hssc-ii-a1
- 1. FAZAIA SCHOOLS & COLLEGES SEND-UP EXAM: PHYSICS HSSC-II A1 (Session 2017-18) Roll No. _______________ Sig. of Invigilator Name of Candidate SECTION – A Time Allowed : 25 Minutes Mark 17 NOTE: Section – A is compulsory. All parts of this section are to be answered on the question paper itself. It should be completed in the first 25 minutes and handed over to the Centre Superintendent. Deleting/overwriting is not allowed. Do not use lead pencil. Q. 1 Circle the correct option i.e. A / B / C / D. Each part carries equal marks. (i) At which of the following points shown in the figure, the electric field E has maximum value? A. A B. B C. C D. All points have same (ii) A rubber balloon is given a positive charge such that at its surface the potential is +5v. What will be the value of potential at its centre? A. -5 V B. 0 V C. +5 V D. 2.5 (iii) A conductor of length “L” is shown in the figure. How will it affect the resistivity, if the length is halved? A. Becomes Double B. Becomes Half C. Becomes Quadrupled D. Remains Same (iv) Electrical power is expressed as: A. V ∆Q B. t ∆t W C. D. (v) Which of the following substances has not positive temperature coefficient of resistance: A. Aluminium B. Copper C. Silver D. Silicon (vi) In which of the following case, there is no magnetic force on a charged particle q moving in magnetic field B: A. B. B C. D. q
- 2. A. Conduction Band B. Conduction Band Forbidden Band Valence Band Valence Band C. Conduction Band D. Valence Band Forbidden Band Forbidden Band Valence Band Conduction Band (vii) Magnetic field B = (4i+18k) Wbm-2 passes through 5km2 area. Net flux through the area is: A. 20 Wb B. 90 ×10 −4 Wb C. 90 Wb D. Zero (viii) When a motor starts then back e.m.f is: A. At its peak value B. High C. Almost zero D. Nil (xi) The current passing through a choke coil of 5H is decreased at the rate of 2 A/s, the induced e.m.f in the coil is: A. -2.5 V B. -10 V C. 2.5 V D. 10 V (x) If voltage across the live and neutral wires in three phase A.C generator is 230 V then voltage across two live wires is: A. 230 V B. 400 V C 300 V D. 320 V (xi) The piece of wire along which charges are made to accelerate is called: (xii) Which of the following best represents the energy-band diagram for insulators? (xiii) The amount of work done in deformed stretched wire is given by: A B C D (xvi) During Forward Bias, the width of the depletion region: A. Decreases B. Increases C. Remains Same D. Varies Randomly (xv) Electromagnetic waves do not transport A. Energy B. Momentum C. Charge D. Information (xvi) If base current is 10µA and collector current is 1mA then current gain of transistor is: A. 10 B. 100 C. 1/100 D. 1000 (xvii) Mutual induction play role in A. Generator B. DC Motor C. Galvanometer D. Transformer 2 L 2 L A. C. Transmitting Antenna L-C Antenna B. D. Receiving Antenna Receiving Station