Sujeet Kumar

Chapter 11 Magnetic Materials 1. Choose the correct option. i) Intensity of magnetic field of the earth at the point inside a hollow iron box is.(A) less than that outside(B) more than that outside(C) same as that outside(D) zeroAnswer:(D) zero ii) Soft iron is used to make the core of transformer because of its(A) low … Read more

Chapter 10 Magnetic Fields due to Electric Current 1. Choose the correct option. i) A conductor has 3 segments; two straight and of length L each and a semicircular with radius R. It carries a current I. What is the magnetic field B at point P?Answer: Answer:(A) -μ0 I, 0 iii) A proton enters a perpendicular … Read more

Chapter 9 Current Electricity 1. Choose the correct option. i) Kirchhoff’s first law, i.e., ΣI = 0 at a junction, deals with the conservation of(A) charge(B) energy(C) momentum(D) massAnswer:(A) charge ii) When the balance point is obtained in the potentiometer, a current is drawn from(A) both the cells and auxiliary battery(B) cell only(C) auxiliary battery … Read more

1. Choose the correct option i) A parallel plate capacitor is charged and then isolated. The effect of increasing the plate separation on charge, potential, capacitance respectively are(A) Constant, decreases, decreases(B) Increases, decreases, decreases(C) Constant, decreases, increases(D) Constant, increases, decreasesAnswer:(A) Constant, decreases, decreases ii) A slab of material of dielectric constant k has the same area … Read more

1. Choose the correct option. i) Which of the following phenomenon proves that light is a transverse wave?(A) reflection(B) interference(C) diffraction(D) polarizationAnswer:(D) polarization ii) Which property of light does not change when it travels from one medium to another?(A) velocity(B) wavelength(C) amplitude(D) frequencyAnswer:(D) frequency iii) When unpolarized light is passed through a polarizer, its intensity(A) … Read more

Chapter 6 Superposition of Waves 1. Choose the correct option. i) When an air column in a pipe closed at one end vibrates such that three nodes are formed in it, the frequency of itsvibrations is …….times the fundamental frequency.(A) 2(B) 3(C) 4(D) 5Answer:(D) 5 ii) If two open organ pipes of length 50 cm … Read more

1. Choose the correct option. i) A particle performs linear S.H.M. starting from the mean position. Its amplitude is A and time period is T. At the instance when its speed is half the maximum speed, its displacement x is ii) A body of mass 1 kg is performing linear S.H.M. Its displacement x (cm) … Read more

Chapter 4 Thermodynamics 1. Choose the correct option. i) A gas in a closed container is heated with 10J of energy, causing the lid of the container to rise 2m with 3N of force. What is the total change in the internal energy of the system?(A) 10J(B) 4J(C) -10J(D) – 4JAnswer:(B) 4J ii) Which of … Read more

Chapter 3 Kinetic Theory of Gases and Radiation 1. Choose the correct option. i) In an ideal gas, the molecules possess(A) only kinetic energy(B) both kinetic energy and potential energy(C) only potential energy(D) neither kinetic energy nor potential energyAnswer:(A) only kinetic energy iii) If pressure of an ideal gas is decreased by 10% isothermally, then … Read more

1) Multiple Choice Questions i) A hydraulic lift is designed to lift heavy objects of maximum mass 2000 kg. The area of cross-section of piston carryingthe load is 2.25 × 10-2 m2. What is the maximum pressure the piston would have to bear?(A) 0.8711 × 106 N/m2(B) 0.5862 × 107 N/m2(C) 0.4869 × 105 N/m2(D) 0.3271 × 104 N/m2Answer:(A) 0.8711 … Read more