Objective Questions

Questions (1820)

#	Question	Topic	Actions
1701	In transformer, core is made up of soft iron in order to pass maximum	PHY 102 Past Questions	View
1702	Inductor connected to 24V, 50Hz AC, current 0.5A. Inductance?	PHY 102 Past Questions	View
1703	Shape of equipotential surface for an infinite line charge is	PHY 102 Past Questions	View
1704	Wire carries 30A, length 5cm, in B=0.8T. Maximum force?	PHY 102 Past Questions	View
1705	Three point charges: q1=15μC at x=2m, q2=6μC at origin, resultant force on q3 (…	PHY 102 Past Questions	View
1706	Flux density is defined by	PHY 102 Past Questions	View
1707	Working principle of transformer depends on	PHY 102 Past Questions	View
1708	Which method of magnetising a steel rod produces the strongest magnet?	PHY 102 Past Questions	View
1709	Value of electric field vector along surface of constant potential 100V is	PHY 102 Past Questions	View
1710	In SI unit, J/C is equal to	PHY 102 Past Questions	View
1711	Three charges +1mC, -1mC, -1mC at vertices of equilateral triangle side 2cm. Fi…	PHY 102 Past Questions	View
1712	i = I_m sin(2ωt). Frequency in Hz?	PHY 102 Past Questions	View
1713	Electric field 2.0 m from point charge is 8.0×10⁴ N/C. Field at 4.0 m? (repeat)	PHY 102 Past Questions	View
1714	Hall probe is made up of	PHY 102 Past Questions	View
1715	Which statement is TRUE? (conductors)	PHY 102 Past Questions	View
1716	Electron in B field: v=10⁷ m/s (assumed), F=1.6×10⁻¹³ N. B?	PHY 102 Past Questions	View
1717	Two bulbs in series, one blows out. Other bulb?	PHY 102 Past Questions	View
1718	When alternating signal flows through a capacitor,	PHY 102 Past Questions	View
1719	Capacitance is:	PHY 102 Past Questions	View
1720	If potential difference across a resistor is doubled,	PHY 102 Past Questions	View
1721	In parallel combination of capacitors, net capacity is greater than	PHY 102 Past Questions	View
1722	Arrange forces in order of increasing strength (repeat)	PHY 102 Past Questions	View
1723	60 W light bulb carries 0.5 A. Total charge in one hour?	PHY 102 Past Questions	View
1724	By how many percent is torque decreased if permanent magnets lose 5.0% of stren…	PHY 102 Past Questions	View
1725	Tade rubs fur on hard rubber rod, rod becomes negative. What happens?	PHY 102 Past Questions	View
1726	Hall voltage is directly proportional to	PHY 102 Past Questions	View
1727	The electrostatic force on a charge in a system of charges	PHY 102 Past Questions	View
1728	The energy stored in a 10 μF capacitor when charged to 500 V is	PHY 102 Past Questions	View
1729	The emf of a battery equals its terminal potential difference:	PHY 102 Past Questions	View
1730	Which is NOT correct about acceleration of charged particle in uniform E field?	PHY 102 Past Questions	View
1731	When current in a coil is doubled and number of turns halved, magnetic field at…	PHY 102 Past Questions	View
1732	To protect meter from stray magnetic fields,	PHY 102 Past Questions	View
1733	What area of plates gives 1 F, separation 1 mm, vacuum?	PHY 102 Past Questions	View
1734	The effective capacitance of a capacitor is reduced when capacitors are connect…	PHY 102 Past Questions	View
1735	The plates of a parallel plate air capacitor are charged to 100 V. A 2mm plate …	PHY 102 Past Questions	View
1736	Which is/are correct about the direction of electric field E at a point P? i. r…	PHY 102 Past Questions	View
1737	A positive charge moving with a constant velocity v enters a region of a unifor…	PHY 102 Past Questions	View
1738	Calculate the de-Broglie wavelength of an electron which has been accelerated f…	PHY 102 Past Questions	View
1739	Which of the following is/are correct about static electricity? It is a branch …	PHY 102 Past Questions	View
1740	Which of the following is true about p-n junction diode? i. Forward bias cu…	PHY 102 Past Questions	View
1741	Which of the following is not true about doping of semiconductor?	PHY 102 Past Questions	View
1742	In a p-type semiconductor, the current conduction is due to	PHY 102 Past Questions	View
1743	Light bulb has input power consumption of 50 watts. The light bulb was activate…	PHY 102 Past Questions	View
1744	Three resistors (2 Ohms, 4 Ohms, 5 Ohms) are connected in parallel with a poten…	PHY 102 Past Questions	View
1745	A transformer assumed to be 100% efficient has 2500 turns at the primary and 50…	PHY 102 Past Questions	View
1746	If electrons flow from the earth to a body, the body is said to have:	PHY 102 Past Questions	View
1747	The strength of a semiconductor crystal comes from:	PHY 102 Past Questions	View
1748	Calculate the force on a wire of length 5cm carrying a current of 30A if it is …	PHY 102 Past Questions	View
1749	KCL is applied at ...............	PHY 102 Past Questions	View
1750	Ohm's law can be used only to a _______ circuit or component.	PHY 102 Past Questions	View
1751	Magnetic lines of force have all but one of the following characteristics. The …	PHY 102 Past Questions	View
1752	What is the primary phenomenon described by Faraday's law of electromagnetic in…	Electromagnetic Induction	View
1753	Who is credited with the first discovery of Electromagnetic Induction in the 18…	Electromagnetic Induction	View
1754	How many distinct laws constitute Faraday's Laws of Electromagnetic Induction?	Electromagnetic Induction	View
1755	What essential condition must be met for an electromotive force (EMF) to be ind…	Electromagnetic Induction	View
1756	When a magnet is moved 'towards' a coil connected to a galvanometer, what is th…	Electromagnetic Induction	View
1757	If a magnet is moved 'away' from a coil connected to a galvanometer, how does t…	Electromagnetic Induction	View
1758	What happens to the galvanometer needle when a magnet, which was previously in …	Electromagnetic Induction	View
1759	According to Faraday's First Law, what is the direct cause for an electromotive…	Electromagnetic Induction	View
1760	Which of the following is NOT listed as a method to change the magnetic field a…	Electromagnetic Induction	View
1761	What does Faraday's Second Law state about the magnitude of the electromotive f…	Electromagnetic Induction	View
1762	Which of the following actions would NOT lead to an increase in the electromoti…	Electromagnetic Induction	View
1763	Which of the following electrical devices is explicitly mentioned as working on…	Electromagnetic Induction	View
1764	What does Fleming's Left Hand Rule primarily determine?	Electromagnetic Induction	View
1765	Fleming's Left-Hand rule is mainly applicable to which type of electrical machi…	Electromagnetic Induction	View
1766	Fleming's Right-Hand rule is mainly applicable to which type of electrical mach…	Electromagnetic Induction	View
1767	According to Faraday's Laws of Electromagnetic Induction, what is the primary d…	Electromagnetic Induction	View
1768	Based on the observations described, what happens to the galvanometer's needle …	Electromagnetic Induction	View
1769	Which of the following factors will increase the electromotive force (EM…	Electromagnetic Induction	View
1770	Which of the following electrical components operates on the basis of Faraday's…	Electromagnetic Induction	View
1771	Fleming's Left-Hand Rule is primarily used to determine the direction of which …	Electromagnetic Induction	View
1772	Which of Fleming's rules is primarily applicable to electric generators?	Electromagnetic Induction	View
1773	What is the fundamental principle of Lenz's Law of Electromagnetic Induction?	Electromagnetic Induction	View
1774	Lenz's Law is fundamentally related to which law of physics?	Electromagnetic Induction	View
1775	What are Eddy Currents?	Electromagnetic Induction	View
1776	In a transformer, what is the undesirable effect of Eddy Currents?	Electromagnetic Induction	View
1777	What is Self Induction?	Electromagnetic Induction	View
1778	What is the SI unit of inductance?	Electromagnetic Induction	View
1779	Which of the following factors does NOT directly affect the inductance o…	Electromagnetic Induction	View
1780	How is Mutual Induction fundamentally different from Self Induction?	Electromagnetic Induction	View
1781	In the formula for mutual inductance M = (μ₀μrN₁N₂A) / l, what does 'A' represe…	Electromagnetic Induction	View
1782	According to Faraday's law of electromagnetic induction, what does a magnetic f…	Electromagnetic Induction	View
1783	Electromagnetic Induction was first discovered in the 1830s by which scientist?	Electromagnetic Induction	View
1784	When a magnet is moved 'towards' a coil, what is the initial response of a galv…	Electromagnetic Induction	View
1785	Which of the following is NOT listed as a method to change the magnetic field, …	Electromagnetic Induction	View
1786	In Faraday's Second Law, what does 'flux linkage' refer to?	Electromagnetic Induction	View
1787	According to the text, how can the induced electromotive force (EMF) in a coil …	Electromagnetic Induction	View
1788	Which of the following electrical equipment works on the basis of Faraday's law…	Electromagnetic Induction	View
1789	Fleming's Left-Hand rule is mainly applicable to which type of electrical devic…	Electromagnetic Induction	View
1790	Fleming's Right-Hand rule is mainly applicable to which type of electrical devi…	Electromagnetic Induction	View
1791	What is the fundamental principle of Lenz's Law regarding the direction of an i…	Electromagnetic Induction	View
1792	Lenz's law is related to which fundamental physical principle?	Electromagnetic Induction	View
1793	What are 'Eddy Currents'?	Electromagnetic Induction	View
1794	Which of the following is NOT listed as a factor that affects inductance?	Electromagnetic Induction	View
1795	What is a key characteristic distinguishing self-inductance from mutual inducta…	Electromagnetic Induction	View
1796	Which of the following statements accurately describes the applicability of Fle…	Electromagnetic Induction	View
1797	What does Fleming's Left Hand Rule determine when a current-carrying conductor …	Electromagnetic Induction	View
1798	According to the document, what happens when a horizontal magnetic field is app…	Electromagnetic Induction	View
1799	In Fleming's Right Hand Rule, if the forefinger represents the direction of the…	Electromagnetic Induction	View
1800	What is the phenomenon known as 'back-emf' according to Lenz's Law?	Electromagnetic Induction	View

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