Physics Mock Test 1 Leave a Comment / By pdhantubalak / May 8, 2023 Welcome to your NTA CUET PHYSICS MOCK TEST 1 Name Email 1. During the formation of depletion layer around the imaginary pn-junction, electrons diffuse from n-region to p-region because: Deselect Answer electro concentration in n-segment is higher than electron concentration in p-segment. holes of p-segment attract the electrons. electrons are lighter and have higher drift velocity. holes concentration in n-segment is higher than the electron in p-segment. 2. Electric potential inside a conducting sphere Deselect Answer is zero. remains constant. decreases from centre to surface. increases from centre to surface. 3. Capacitance of a parallel plate capacitor can be increased by: Deselect Answer increasing the distance between the plates. decreasing the distance between the plates. decreasing the area of plates. increasing the thickness of the plates. 4. The capacitance of a parallel plate capacitor is 10 mF. When a dielectric plate is introduced in between the plates, its potential becomes 1/4th of its original value. What is the value of the dielectric constant of the plate introduced? Deselect Answer 4 40 2.5 None of the above 5. . Deselect Answer in Figure (iv) is the largest. in Figure (iii) is the least. in Figure (ii) is same as Figure (iii) but is smaller than Figure (iv). is the same for all the figures. 6. Electric charge between two bodies can be produced by Deselect Answer sticking rubbing oiling passing AC current 7. Photoelectrons emitted from a metal have Deselect Answer different speeds starting from 0 to certain maximum. same kinetic energy same frequency. Both (2) & (3) 8. Tritium is an isotope of hydrogen whose nucleus Triton contains 2 neutrons and 1 proton. Free neutrons decay into p + ē + ν. If one of the neutrons in Tritium decays, it would transform into 2He3 nucleus. This does not happen. This is because Deselect Answer tritium energy is less than that of a 2He3 nucleus. the electron created in the beta decay process cannot remain in the nucleus. both the neutrons in triton have to decay simultaneously resulting in a nucleus with 3 protons, which is not a He3 nucleus. because free neutrons decay due to external perturbations which is absent in a triton nucleus. 9. Photons are Deselect Answer electrically neutral and not deflected by electric or magnetic field. electrically neutral and deflected by magnetic field. electrically charged and not deflected by electric or magnetic field. electrically charged and not deflected by electric field. 10. Two cells of emf’s approximately 5 V and 10 V are to be accurately compared using a potentiometer of length 400 cm : Deselect Answer The battery that runs the potentiometer should have voltage of 8 V. The battery of potentiometer can have a voltage of 15 V and R adjusted so that the potential drop across the wire slightly exceeds 10 V The first portion of 50 cm of wire itself should ave a potential drop of 10 V Potentiometer is usually used for comparing resistances and not voltages. 11. Which one of the following statements is correct? Deselect Answer Potentiometer is used to measure the current in a circuit. Potentiometer is used to measure the internal resistance of a cell. Potentiometer is used to measure the resistance of a circuit. Potentiometer is used to measure the potential difference across a resistor 12. A circular current loop of magnetic moment M is in an arbitrary orientation in an external magnetic field B. The work done to rotate the loop by 30° about an axis perpendicular to its plane is Deselect Answer MB (√3MB)/2 MB/2 zero 13. Which error of meter bridge is removed when the known and unknown resistances are interchanged? Deselect Answer End error Measurement error Percentage error Parallax error 14. To convert a galvanometer to ammeter a shunt S is to be connected with the galvanometer. The effective resistance of the ammeter then is Deselect Answer GS/(G+S) (G+S)/GS G+S None of the above 15. At any point, empty space surrounded by a toroid, the magnetic field is B1. At any point, outside the toroid, the magnetic field is B2 Deselect Answer B1 > B2 B2 > B1 B1 = B2 B1 = B2 = 0 16. When a charged particle moves through a magnetic field perpendicular to its direction. Then Deselect Answer linear momentum changes kinetic energy remains constant both (1) and (2) both linear momentum and kinetic energy varies 17. A galvanometer can be converted into a voltmeter by connecting a Deselect Answer high resistance in series. high resistance in parallel. low resistance in parallel. low resistance in series. 18. Current sensitivity of a galvanometer is given by Deselect Answer Cq/nBA nBA/C nBA/CG CG/nBA 19. A coil of N turns and radius R carries a current I. It is unwound and rewound to make a square coil of side a having same number of turns (N). Keeping the current I same, the ratio of the magnetic moments of the circular coil and the square coil is Deselect Answer (πR²)/a² (πa²)/r² R²/a² none of the above 20. A ferromagnetic substance is heated above its curie temperature. Which of the following statements is correct? Deselect Answer Ferromagnetic domains get perfectly arranged Ferromagnetic domains get randomly arranged. Ferromagnetic domains are not at all influenced Ferromagnetic material transforms into diamagnetic substance. 21. A magnetic dipole moment is a vector quantity directed from: Deselect Answer South to North North to South East to West West to East 22. Three waves A, B and C of frequencies 1,600 kHz, 5 MHz and 60 MHz, respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communication? Deselect Answer A is transmitted via space wave while B and C are transmitted via sky wave. A is transmitted via ground wave, B via sky wave and C via space wave. B and C are transmitted via ground wave while A is transmitted via sky wave. B is transmitted via ground wave while A and C are transmitted via space wave. 23. The polarity of induced emf is defined by Deselect Answer Ampere’s circuital law. Biot-Savart law Lenz’s law. Fleming’s right hand rule 24. . Deselect Answer 1 2 3 4 25. Which of these sets of logic gates are designated as universal gates? Deselect Answer NAND NOX EX-OR EX-NOR 26. Magnetic field energy stored in a coil is Deselect Answer Li² Li/2 Li Li²/2 27. . Deselect Answer 1 2 3 4 28. In which of the following application, eddy current has no role to play? Deselect Answer Electric power meters Induction furnace LED lights Magnetic brakes in trains 29. . Deselect Answer 1 2 3 4 30. Which of the following combinations should be selected for better tuning of an L-C-R circuit used for communication? Deselect Answer 1 2 3 4 31. . Deselect Answer 1 2 3 4 32. The underlying principle of transformer is Deselect Answer resonance. mutual induction. self induction. none of the above 33. The power factor of series LCR circuit at resonance is Deselect Answer 0.707 1 0.5 0 34. Semiconductors behave like insulators at ______ Deselect Answer 0°C 0°K 273K none of the above 35. . Deselect Answer 1 and 3 both correspond to forward bias of junction 3 corresponds to forward bias of junction and 1 corresponds to reverse bias of junction 1 corresponds to forward bias and 3 corresponds to reverse bias of junction. 3 and 1 both correspond to reverse bias of junction. 36. . Deselect Answer 1 2 3 4 37. Convex mirrors are preferred over plane mirrors as rear view mirror in automobile since Deselect Answer the image formed is magnified. the image formed is real the field of view is large. it is light weight 38. . Deselect Answer 1 2 3 4 39. . Deselect Answer 1 2 3 4 40. A and B could hear the music programme due to phenomenon namedDeselect Answer interference. scattering diffraction. dispersion. 41. Diffraction is more pronounced with ______ wavelengths.Deselect Answer longer shorter fluctuating all 42. The minimum and maximum frequencies in the musical programme were 550 Hz and 10 kHz. Which frequency was better audible around the pillar obstacle?Deselect Answer 10kH 550KH Mid frequency the complete frequency range 43. Diffraction of sound takes place more when :Deselect Answer sound is diffracted through an opening having width equal to the wavelength of the sound. sound is diffracted through an opening having width more than the wavelength of the sound. sound is diffracted through an opening having width less than the wavelength of the sound. diffraction of sound does not depend on the width of the opening. 44. How the waveform will look like outside the door of the hall?Deselect Answer Sound repeater Sound reflector Localized sound source None of the above 45. The total potential difference across a combination of a resistor in series is equal toDeselect Answer V1 + V2 + V3 V1 – V2 +V2 V1 + V2 None of these 46. In a series combination of resistors, the current isDeselect Answer same at every point of the circuit different at every point of the circuit zero can not be determined 47. The electrical energy disputed in the resistor is given byDeselect Answer W = VIT W = VIR W = RIT W = RT 48. If 5 resistors, each of value 0.2 ohm are connected in series what will be the resultant resistanceDeselect Answer 1 ohm 10 ohm 6 ohm 8 ohm 49. The diagram below shows part of a circuit:If this arrangement of three resistors was to be replaced by a single resistors, its resistance should be:Deselect Answer 6 ohm 14 ohm 9 ohm 18 ohm