ATTENTION:
Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.
Good luck!
PHY102
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1. Whose law is employed in electrostatics ?
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2. The --------------------------- number is the total number of neutrons and protons.
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3. An ammeter is suspected of giving inaccurate readings. In order to confirm the readings, the ammeter is connected to a silver votltameter in series and a steady current is passed for one hour. The ammeter reads 0.56A and 2.0124g of silver is deposited. What is the error is the ammeter reading?
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4. The surface integral of the electric field E over a surface is defined to be electric ---------------------------
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5. Electric flux density is a function of ---------------------------
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6. An air-cored transformer is assumed to be 100% efficient. The ratio of the secondary turns to the primary turns is 1:20. A 240V ac supply is connected to the primary coil and a $6Omega$ load is connected to the secondary coil. what is the current in the primary coil?
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7. A proton is accelerated through a potential difference of 100V and the enters a region in which it is moving perpendicular to a magnetic field of flux density 0.20 T. Find the radius of the circular path in which it will travel.
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8. Which of the following can be used to charge a metal rod that si held in your hand? Rub it with ______
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9. The variation of the compass from the north-south direction is called the ---------------------------
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10. When beta decay occurs --------------------------- changes into a proton and electron.
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11. A magnetic field does not exert a force on a _________
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12. An alpha particle is a --------------------------- nucleus consisting of 2 protons and 2 neutrons.
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13. For capacitors in parallel, the potential difference across each capacitor is ---------------------------
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14. The minimum energy required to liberate an electron from a metal surface is called ---------------------------.
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15. According to Faraday's law, the magnitude of the induced e.m.f is proportional to the rate of change of --------------------------- linking the circuit.
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16. When an atom is in the ground state it is said to be ---------------------------
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17. A voltmeter connected across a 60Hz ac source reads 240V. Write down the expression of the instanteneous voltage as a function of time.
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18. When a charge density depends only on the perpendicular distance from a plane, the charge distribution is said to have--------------------------- symmetry.
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19. The magnetic North is found by suspending a bar magnet freely on the --------------------------- axis.
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20. If the steady current in a wire is coming directly toward you, the magnetic field lines
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21. The potential difference between two points B and A is equal to the --------------------------- in taking a unit positive charge from A to B.
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22. Electric field is measured in Newton per ---------------------------.
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23. The work function of a metal is 3.45eV. Calculate th maximum wavelength of a photon that can eject photo-electrons from the metal
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24. The electric flux is a --------------------------- quantity.
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25. A potentiometer wire of length 100cm has a resistance of 10$Omega$. It is connected in series to to a resistance R and a cell of emf 2V and negligible internal resistance. A source of emf of 10mV is balanced by a length of 40cm of the potentiometer wire. What is the value of the resistance R?
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26. In the space surrounding a wire carrying a steady current, there exists ________
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27. A rectangular coil of dimensions 20 cm by 15 cm lies with its plane parallel to a magnetic field of $ 0.5 W/$m^{2}$. The coil, carrying a current of 10 A experiences a torque of 4.5 Nm in the field. How many loops has the coil?
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28. The --------------------------- is the SI Unit of electric charge
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29. Field lines are drawn such that the lines per unit cross-section area is proportional to ---------------------------field.
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30. An electric field of 50 kV/m is perpendicular to a magnetic field 0.25 T. What is the velocity of a charge whose initial of motion is perpendicular to both fields and which passes through the fields undeflected?
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31. A region where an electric charge experiences a force is ---------------------------field
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32. Which of the following is a conductor
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33. The magnetic flux through each loop of a 35-loop coil is given by $(3.6t-0.71t^{3})times10^{-2}Tm^{2}$, where the time is in seconds. Determine the induced emf at t=5.0s.
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34. The resistivity of a semiconductor decreases rapidly with increasing ---------------------------.
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35. Gaussian surface is an imaginary closed ---------------------------
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36. According to ohm's law the potential difference is proportional to the ---------------------------
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37. The term 'lost volts' refers to -----------
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38. For how long must a steady current of 2A flow through a copper voltameter to deposit $10^{-3}$kg of copper? Z for coper is 0.000329g/C
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39. A negative charge ---------------------------negative charge
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40. The following are true about electric field lines except that they ______
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41. An ac circuit consists of a voltage source $v = 200sin120pi{t}$ and a $6mu$F capacitor in series. Calculate the current established in the circuit
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42. For capacitors connected in series each has the same ____________.
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43. When amber is rubbed with fur
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44. Kirchhof's loop rule is statement of conservation of __________
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45. Three point charges $$2mu{C$}, ${-}4mu{C}$$, and $$6mu{C}$$ are held at the corners of an equilateral triangle with sides equal to 3 cm.What is the resultant force in newtons on the $$2mu{C}$$ charge?
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46. Gauss's law applies to any hypothetical closed surface called --------------------------- surface.
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47. A huge spark due to electric discharge in the atmosphere produces all of the following except ______
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48. Neutral objects constitute of equal ---------------------------
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49. Calculate the electric field at distance of 320 cm from an infinitely long wire carrying a charge per unit length 8.3 C/m.
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50. A charge distribution in which the charge density at any point depends only on the distance of the point from a central point and not on the direction is said to be spherically ---------------------------
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