Objective Questions

Questions (1820)

#	Question	Topic	Actions
1201	Select the option that best describes a dielectric:	PHY 102 Past Questions	View
1202	A system of two conductors separated by air or any insulating material forms:	PHY 102 Past Questions	View
1203	The energy stored in a 10 uF capacitor when charged to 500 V is:	PHY 102 Past Questions	View
1204	If 4 uF and 2 uF capacitors are connected in series, the equivalent capacitance…	PHY 102 Past Questions	View
1205	A 20 uF capacitor is charged to 200 V. Its stored energy is:	PHY 102 Past Questions	View
1206	If the separation of the plates of a parallel plate capacitor is halved, its ca…	PHY 102 Past Questions	View
1207	Two identical conducting plates of area A are separated by distance d. A metal …	PHY 102 Past Questions	View
1208	The effective capacitance is reduced when capacitors are connected in:	PHY 102 Past Questions	View
1209	The resonant frequency of a circuit is 1000 kHz. If each of the capacitance and…	PHY 102 Past Questions	View
1210	Capacitances of 15 F and 5 F are connected in parallel across a 20 V battery. W…	PHY 102 Past Questions	View
1211	Series RLC: R=10Ω, L=0.5H, C=10μF. Frequency for max current?	PHY 102 Past Questions	View
1212	SI unit of potential difference is?	PHY 102 Past Questions	View
1213	Electric field is a?	PHY 102 Past Questions	View
1214	Uniform E=41 N/C, plates length 0.5m, width 0.001m, separation 1.5 cm. Voltage …	PHY 102 Past Questions	View
1215	Best way to demagnetise a magnetised steel needle?	PHY 102 Past Questions	View
1216	Loop: 25 turns, area 2.0×10⁻³ m², current 1.25 A, plane parallel to B=0.2 T. To…	PHY 102 Past Questions	View
1217	Potential difference required for 0.2 A in conductor of resistance 20 Ω?	PHY 102 Past Questions	View
1218	A dielectric slab is slowly inserted between the plates of a parallel plate cap…	PHY 102 Past Questions	View
1219	1 Farad is theoretically equal to	PHY 102 Past Questions	View
1220	Two identical capacitors, each of capacitance C, are connected in parallel and …	PHY 102 Past Questions	View
1221	Which of the following is true of the capacitance C of a parallel plate capacit…	PHY 102 Past Questions	View
1222	The presence of a dielectric between the plates of a capacitor results in?	PHY 102 Past Questions	View
1223	Energy stored in a 2000 mF capacitor charged to a potential difference of 10 V …	PHY 102 Past Questions	View
1224	If two capacitors of 10 uF each are connected in parallel, their equivalent cap…	PHY 102 Past Questions	View
1225	A 6 uF capacitor and a 3 uF capacitor are connected in series across an 18 V d.…	PHY 102 Past Questions	View
1226	When a voltage of 1 kV is applied to a capacitor, the charge on the capacitor i…	PHY 102 Past Questions	View
1227	Four 2 uF capacitors are connected in series. The equivalent capacitance is:	PHY 102 Past Questions	View
1228	The unit of Capacitance is?	PHY 102 Past Questions	View
1229	Four capacitors each of 4 F are connected in parallel. What is the equivalent c…	PHY 102 Past Questions	View
1230	Capacitance is:	PHY 102 Past Questions	View
1231	In the case of a parallel combination of capacitors, the net capacity is greate…	PHY 102 Past Questions	View
1232	A battery is used to charge a parallel-plate capacitor, after which it is DISCO…	PHY 102 Past Questions	View
1233	Which of the following factors does not affect the capacitance of a capacitor?	PHY 102 Past Questions	View
1234	The capacitance of a parallel plate air capacitor depends on the following exce…	PHY 102 Past Questions	View
1235	To obtain a high value of capacitance, the permittivity of the dielectric mediu…	PHY 102 Past Questions	View
1236	What area of the plates of a parallel-plate capacitor gives 1 F, if the separat…	PHY 102 Past Questions	View
1237	Calculate the resonant frequency of a series R-C-L circuit with R = 100 ohms, C…	PHY 102 Past Questions	View
1238	A 10 uF capacitor is charged by a 24 V battery through a 400 k-ohm resistor. Af…	PHY 102 Past Questions	View
1239	An external resistance R is connected to a cell of internal resistance r. The P…	PHY 102 Past Questions	View
1240	If there are two bulbs connected in series and one blows out, what happens to t…	PHY 102 Past Questions	View
1241	Four wires meet at a junction. The first carries 4 A into the junction, the sec…	PHY 102 Past Questions	View
1242	The terminal voltage of a cell supplying energy to a circuit is usually less th…	PHY 102 Past Questions	View
1243	When cells are connected in parallel, ...	PHY 102 Past Questions	View
1244	Three equal resistors in series give 90 W. What is the equivalent power in para…	PHY 102 Past Questions	View
1245	A current of 0.3 A flows for 2 minutes through a 6 V supply. Find the energy di…	PHY 102 Past Questions	View
1246	A 20 k-ohm resistor is connected in series with a 40 k-ohm resistor. What resis…	PHY 102 Past Questions	View
1247	'The sum of the emfs and potential differences around a closed loop equals zero…	PHY 102 Past Questions	View
1248	In an antique automobile, a 6 V battery supplies a total of 48 W to two identic…	PHY 102 Past Questions	View
1249	For a cell with EMF E and internal resistance r connected with an external resi…	PHY 102 Past Questions	View
1250	Resistances of 2.0, 4.0 and 6.0 ohms and a 24 V emf device are all in parallel.…	PHY 102 Past Questions	View
1251	When two unequal values of resistors are connected in parallel across a DC sour…	PHY 102 Past Questions	View
1252	The rate at which electrical energy is used may be measured in:	PHY 102 Past Questions	View
1253	Three resistors (2, 4 and 5 ohms) are connected in parallel with a potential di…	PHY 102 Past Questions	View
1254	Four cells each of e.m.f 1.5 V are connected together in PARALLEL to form a bat…	PHY 102 Past Questions	View
1255	The main source of internal resistance of a cell is:	PHY 102 Past Questions	View
1256	A battery with an emf of 24 V is connected to a 6 ohm resistor. A current of 3 …	PHY 102 Past Questions	View
1257	A car battery is rated at 80 A.h. An ampere-hour is a unit of:	PHY 102 Past Questions	View
1258	How much current does a 60 W light bulb draw when connected to a voltage of 240…	PHY 102 Past Questions	View
1259	Two identical batteries, each with emf 18 V and internal resistance 1 ohm, are …	PHY 102 Past Questions	View
1260	In Fleming's left-hand rule, the thumb shows the direction of:	PHY 102 Past Questions	View
1261	A conductor of length L has current I passing through it. When it is placed PAR…	PHY 102 Past Questions	View
1262	Which among the following quantities is not affected by the magnetic field?	PHY 102 Past Questions	View
1263	F = BIL can only be used if the magnetic field and electric current are:	PHY 102 Past Questions	View
1264	Two long parallel wires are 40 mm apart. If currents of 20 A and 30 A are appli…	PHY 102 Past Questions	View
1265	What is the name given to the current that is induced when a metal sheet is pul…	PHY 102 Past Questions	View
1266	A coil has 45 turns and an area of 1.8x10-2 m2. If the torque on the coil is 2.…	PHY 102 Past Questions	View
1267	Calculate the force on a wire of length 5 cm carrying a current of 30 A if it i…	PHY 102 Past Questions	View
1268	A wire of length 2.5 m carrying a current of 1.3 A is inclined at an angle thet…	PHY 102 Past Questions	View
1269	Force per metre on two wires carrying a current of 1 A placed 1 m apart is equa…	PHY 102 Past Questions	View
1270	A current of 3 A flows through a 1 m long conductor. Calculate the force experi…	PHY 102 Past Questions	View
1271	Direction of conventional current is	PHY 102 Past Questions	View
1272	A galvanometer of 50 ohms gives full scale deflection with 2 mA current. To con…	PHY 102 Past Questions	View
1273	An electric motor is connected to a 240 V mains supply. The armature draws 15 A…	PHY 102 Past Questions	View
1274	Emf induced in a coil rotating in a uniform magnetic field will be maximum when:	PHY 102 Past Questions	View
1275	The induced emf when the magnetic field, length and velocity of the conductor a…	PHY 102 Past Questions	View
1276	Lenz's law states that the direction of the induced e.m.f. and hence current:	PHY 102 Past Questions	View
1277	An alternating voltage whose peak value is 80 volts is connected across a 60 oh…	PHY 102 Past Questions	View
1278	A series R-L-C circuit has R = 10 ohms, L = 0.5 H and C = 10 uF. Calculate the …	PHY 102 Past Questions	View
1279	The equation of a current is given by i = I sin(2wt). The frequency of the curr…	PHY 102 Past Questions	View
1280	Find the electric field intensity at a distance of 20cm from a charge of 2nC.	PHY 102 Past Questions	View
1281	The earth is taken to be at a potential of?	PHY 102 Past Questions	View
1282	Which of the following is the correct unit of Coulomb's constant?	PHY 102 Past Questions	View
1283	Which of the following is the correct unit for volume charge density?	PHY 102 Past Questions	View
1284	Resistivity of a wire depends on:	PHY 102 Past Questions	View
1285	Calculate the ratio of the resistivity of 2 wires having the same length and sa…	PHY 102 Past Questions	View
1286	The reciprocal of resistivity is:	PHY 102 Past Questions	View
1287	As compared to short wires, long wires have ......	PHY 102 Past Questions	View
1288	What is the unit of temperature coefficient (of resistance)?	PHY 102 Past Questions	View
1289	In a.c. circuit phasor diagrams, which quantity is taken as the vector referenc…	PHY 102 Past Questions	View
1290	By accelerating a magnet inside a coil, the current in it:	PHY 102 Past Questions	View
1291	What happens to the current in a series circuit if the resistance is doubled?	PHY 102 Past Questions	View
1292	A pressing iron is rated 240 V, 1200 W, 50 Hz. What is the peak current it draw…	PHY 102 Past Questions	View
1293	For an ohmic resistor, resistance is the proportionality constant for:	PHY 102 Past Questions	View
1294	The fuse in the lighting circuit of a house would most probably be made of:	PHY 102 Past Questions	View
1295	The force existing between two parallel current-carrying conductors is F. If th…	PHY 102 Past Questions	View
1296	An inductor L = 1 H in series with a resistor R = 150 ohms is connected to an A…	PHY 102 Past Questions	View
1297	Two wires A and B with circular cross-sections have identical lengths and are m…	PHY 102 Past Questions	View
1298	The resistance of a pure metal:	PHY 102 Past Questions	View
1299	A wire of resistance 2 Ohm is stretched uniformly to twice its original length.…	PHY 102 Past Questions	View
1300	A 30 cm long solenoid has 2000 turns of wire on an iron rod whose cross-section…	PHY 102 Past Questions	View

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