Objective Questions

Questions (1820)

#	Question	Topic	Actions
1401	There is no induced current in the coil when the magnet in the coil stops movin…	PHY 102 Past Questions	View
1402	Two electric bulbs have resistances in the ratio 1:2. If they are joined in ser…	PHY 102 Past Questions	View
1403	A capacitor has a capacitance of 4.0 uF and is charged through a resistor of re…	PHY 102 Past Questions	View
1404	If the plate separation of a parallel plate capacitor is doubled, what happens …	Gauss's Law and Electrostatic Fields	View
1405	A series R-L-C circuit has R=10 Ohm, L=0.5H and C=10 uF. Calculate the impedanc…	PHY 102 Past Questions	View
1406	A loop of wire of 25 turns has an area of 2.0x10-2 m2. A current of 1.25A flows…	PHY 102 Past Questions	View
1407	A 60-watt light bulb carries a current of 0.5 A. The total charge passing throu…	PHY 102 Past Questions	View
1408	An inductor, L = 0.5H, in series with a resistor, R = 250 Ohm, are connected to…	PHY 102 Past Questions	View
1409	A proton has a magnetic field due to its spin on its axis. The field is similar…	PHY 102 Past Questions	View
1410	Derived unit Tesla is related to:	PHY 102 Past Questions	View
1411	The force on an electron moving in a magnetic field of strength 0.25 T is 3.2x1…	PHY 102 Past Questions	View
1412	Fleming's left-hand rule is used to find	PHY 102 Past Questions	View
1413	A charged particle is placed in a uniform magnetic field and negligible gravita…	PHY 102 Past Questions	View
1414	If Earth's magnetic field lines pass through a Hall probe in the opposite direc…	PHY 102 Past Questions	View
1415	A solenoid of 100 turns is 75 mm in length, has a diameter of 40 mm with a curr…	PHY 102 Past Questions	View
1416	1 Tesla is equal to:	PHY 102 Past Questions	View
1417	The radius R of the circular path of an electron with mass M and charge q movin…	PHY 102 Past Questions	View
1418	How can a magnetic field be produced?	PHY 102 Past Questions	View
1419	A galvanometer has spring constant k, magnetic field B, and deflection angle th…	PHY 102 Past Questions	View
1420	In a moving coil galvanometer, pole faces of the U-shaped magnet are made conca…	PHY 102 Past Questions	View
1421	The return spring of a galvanometer has spring constant 0.5 N/m. If the coil ha…	PHY 102 Past Questions	View
1422	A uniform magnetic field causes circular motion if the charge moves	PHY 102 Past Questions	View
1423	Which of the following materials is most suitable for making a permanent magnet?	PHY 102 Past Questions	View
1424	What part will surely tell that a given motor is a DC motor and not an AC type?	PHY 102 Past Questions	View
1425	An electron is travelling at right angles to a uniform magnetic field of flux d…	PHY 102 Past Questions	View
1426	The law which states "an induced e.m.f. always gives rise to a current whose ma…	PHY 102 Past Questions	View
1427	For an electron, the magnitude of the magnetic force on it is	PHY 102 Past Questions	View
1428	Which of the following methods of magnetising a steel rod will produce the stro…	PHY 102 Past Questions	View
1429	An electron moves in a uniform magnetic field B with a velocity of 1x107 m/s. I…	PHY 102 Past Questions	View
1430	Strength of magnetic field of solenoid can be increased by adding a core made of	PHY 102 Past Questions	View
1431	By how many percent is the torque of a motor decreased if its permanent magnets…	PHY 102 Past Questions	View
1432	Weakest force in nature is?	PHY 102 Past Questions	View
1433	The working of a meter is based on the use of a permanent magnet. In order to p…	PHY 102 Past Questions	View
1434	Which one of the following options is used for the effect in which a changing c…	PHY 102 Past Questions	View
1435	The flux linking a coil changes from 5.0x10-4 Wb to 2.2x10-4 Wb in 0.025 second…	PHY 102 Past Questions	View
1436	What unit is used for inductance?	PHY 102 Past Questions	View
1437	In generators, rate of change of flux linkage is maximum when the coil is in:	PHY 102 Past Questions	View
1438	An emf of 16 V is induced in a coil of inductance 4 H. The rate of change of cu…	PHY 102 Past Questions	View
1439	Which one of the following does NOT change the magnetic flux linking the conduc…	PHY 102 Past Questions	View
1440	In a magnet-coil arrangement where the flux of the magnet links the coil, E.M.F…	PHY 102 Past Questions	View
1441	Which of the following is true for an a.c. circuit?	PHY 102 Past Questions	View
1442	When an alternating signal flows through an inductor:	PHY 102 Past Questions	View
1443	Find the amplitude, phase, period, and frequency of the sinusoid V(t) = 12 cos(…	PHY 102 Past Questions	View
1444	A transformer which is 80% efficient gives an output of 12 V and 4 A. What is t…	PHY 102 Past Questions	View
1445	An a.c. circuit has a peak voltage of 100 V across a 50 Ohm resistor. What are …	PHY 102 Past Questions	View
1446	When an alternating signal flows through a capacitor:	PHY 102 Past Questions	View
1447	A transformer has 200 turns in its primary coil and 600 turns in its secondary …	PHY 102 Past Questions	View
1448	An RLC circuit has R = 100 Ohm, L = 1 H, C = 10 uF, and w = 400 rad/s. Determin…	PHY 102 Past Questions	View
1449	A step-down transformer changes:	PHY 102 Past Questions	View
1450	The primary coil of a transformer is supplied with 45 V. What is the ratio of t…	PHY 102 Past Questions	View
1451	Transformer core losses include:	PHY 102 Past Questions	View
1452	When an object is displaced from its equilibrium position, the oscillating syst…	PHY 102 Past Questions	View
1453	In a loss-free R-L-C circuit, the transient current is:	PHY 102 Past Questions	View
1454	The power dissipated by a 72 Ohm resistor connected to a sinusoidal AC source i…	PHY 102 Past Questions	View
1455	Which of the following is the correct relationship between PEAK value and R.M.S…	PHY 102 Past Questions	View
1456	A given RLC circuit has R=100 Ohm, L=1H and C=10uF all connected in series with…	PHY 102 Past Questions	View
1457	A sinusoidal voltage is applied to a series RLC circuit with L = 10.0mH, C = 10…	PHY 102 Past Questions	View
1458	Two waves traveling on a string in the same direction have frequency 100 Hz, wa…	PHY 102 Past Questions	View
1459	The amount of diffraction that a wave undergoes as it passes through an opening…	PHY 102 Past Questions	View
1460	In a Young's double slit experiment, the first dark fringe makes an angle of 1 …	PHY 102 Past Questions	View
1461	Which of the following describes the image seen through a magnifying glass?	PHY 102 Past Questions	View
1462	The angular velocities of three bodies in simple harmonic motion are w1, w2, w3…	PHY 102 Past Questions	View
1463	Two tuning forks have frequencies 256 and 260 Hz. What is the beat frequency if…	PHY 102 Past Questions	View
1464	A telescope in an observatory has an objective lens of diameter 1 m and focal l…	PHY 102 Past Questions	View
1465	Two plane mirrors are inclined to each other so as to produce eight images. Wha…	PHY 102 Past Questions	View
1466	A pulse of sound is produced at the bottom of a boat. The sound travels through…	PHY 102 Past Questions	View
1467	In a shallow tank, a water wave moves through a barrier with a narrow gap. The …	PHY 102 Past Questions	View
1468	The work function of platinum is twice that of calcium. If the minimum photon e…	PHY 102 Past Questions	View
1469	What is the cut-off frequency of radiation that can eject photoelectrons from s…	PHY 102 Past Questions	View
1470	A radioactive substance has a half-life of 2 weeks. At the beginning of an inve…	PHY 102 Past Questions	View
1471	The threshold wavelength of photoelectric emission of a metal is 4000 Angstroms…	PHY 102 Past Questions	View
1472	The half-life of a substance is 24 years; find the amount of the substance left…	PHY 102 Past Questions	View
1473	A radioactive source has a half-life of 1 minute. At time t=0 it is placed near…	PHY 102 Past Questions	View
1474	In case the charges are similar, the force is of:	PHY 102 Past Questions	View
1475	Can magnetic flux lines be seen?	PHY 102 Past Questions	View
1476	Calculate the efficiency of a motor of 240V that requires 12A to lift a 600kg l…	PHY 102 Past Questions	View
1477	A ray of light travels through transparent plastic to air. The ray of light ent…	PHY 102 Past Questions	View
1478	Unravelling (unwinding) an electromagnet's coil gives	PHY 102 Past Questions	View
1479	When a source of dim orange light shines on a photosensitive metal, no photoele…	PHY 102 Past Questions	View
1480	What are the units of the time constant RC?	Capacitors and Capacitance	View
1481	A capacitor of 100 μF is charged through a 10 kΩ resistor. What is the time con…	Capacitors and Capacitance	View
1482	What is the energy density (energy per unit volume) stored in the electric fiel…	Capacitors and Capacitance	View
1483	In a series RC circuit with a battery, what happens to the current as the capac…	Capacitors and Capacitance	View
1484	What is the voltage across a capacitor immediately after the switch is closed i…	Capacitors and Capacitance	View
1485	In SI units, J C-1 is equal to	PHY 102 Past Questions	View
1486	The capacitance is directly proportional to the area of?	PHY 102 Past Questions	View
1487	Based on the document, what phenomenon induces an electromotive force (emf)?	Electromagnetic Induction	View
1488	According to Faraday's Law, the induced emf in a circuit is proportional to wha…	Electromagnetic Induction	View
1489	Which of the following equations correctly represents Faraday's Law of Inductio…	Electromagnetic Induction	View
1490	For the easiest case, with a constant magnetic field (B) and a flat surface of …	Electromagnetic Induction	View
1491	According to the document, what are the units for magnetic flux?	Electromagnetic Induction	View
1492	When the magnetic field (B) is not constant or the surface is not flat, the mag…	Electromagnetic Induction	View
1493	In Faraday's experiments, what was observed when a magnet was moved relative to…	Electromagnetic Induction	View
1494	One of Faraday's experiments described in the document involved two coils. What…	Electromagnetic Induction	View
1495	What is the fundamental principle of Lenz's Law regarding induced emf and curre…	Electromagnetic Induction	View
1496	According to Lenz's Law, if the magnetic flux through a loop is decreasing, wha…	Electromagnetic Induction	View
1497	How does moving a loop in a uniform and constant magnetic field induce an EMF, …	Electromagnetic Induction	View
1498	The document states that 'moving a circuit in a magnetic field produces an emf …	Electromagnetic Induction	View
1499	What is explicitly stated as the cause of an induced electric field (E) in the …	Electromagnetic Induction	View
1500	In comparing electrostatic fields (E_e) and induced electric fields (E), which …	Electromagnetic Induction	View

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