Objective Questions

Questions (1820)

#	Question	Topic	Actions
201	When do we get maximum energy from a set of capacitors?	PHY 102 Past Questions	View
202	The direction of induced emf can be found by	PHY 102 Past Questions	View
203	When three capacitors are joined in series, the total capacitance is?	PHY 102 Past Questions	View
204	Lenz’ law states that the direction of induced emf and hence current	PHY 102 Past Questions	View
205	The magnetic field B is a function of magnetic flux Φ and cross-sectional area …	PHY 102 Past Questions	View
206	An inductor L=1H in series with R=150Ω, AC source 60V, 50Hz. Phase angle?	PHY 102 Past Questions	View
207	Two identical batteries, each emf 18V, internal resistance 1Ω, in parallel, acr…	PHY 102 Past Questions	View
208	Which of the following is false.	PHY 102 Past Questions	View
209	Two charges Q1=500 mC, Q2=100 mC at r1=3j m, r2=4i m. Force on Q2?	PHY 102 Past Questions	View
210	If we reverse direction of electric current, direction of magnetic field will be	PHY 102 Past Questions	View
211	The plane of a conducting wire loop is parallel to x-y plane. B field in z-dire…	PHY 102 Past Questions	View
212	Electric motor: 240V, 15A, armature resistance 0.15Ω. Power developed in armatu…	PHY 102 Past Questions	View
213	The force per unit charge is known as?	PHY 102 Past Questions	View
214	wire length 2.5m, current 1.3A, inclined at angle θ to B=0.4T, force 0.92N. Fin…	PHY 102 Past Questions	View
215	Force between two parallel current-carrying conductors is F. If current in each…	PHY 102 Past Questions	View
216	What part tells that motor is DC not AC?	PHY 102 Past Questions	View
217	Amount of diffraction through an opening depends on	PHY 102 Past Questions	View
218	Which is TRUE about magnetic flux?	PHY 102 Past Questions	View
219	Which will NOT result in induced current?	PHY 102 Past Questions	View
220	Energy to charge a 10 µF capacitor to 100 V? (Capacitance value missing unit)	PHY 102 Past Questions	View
221	Apparent power = 30 VA, source 36V, R=40Ω. Power factor?	PHY 102 Past Questions	View
222	Total flux emerging from a given charge is independent of medium. This is state…	PHY 102 Past Questions	View
223	When a glass rod is rubbed with silk, which best describes what happens?	PHY 102 Past Questions	View
224	Which cannot be units of electric intensity?	PHY 102 Past Questions	View
225	Battery emf 24V, 6Ω resistor, current 3A. Terminal p.d.? (repeat from earlier)	PHY 102 Past Questions	View
226	Fleming’s left hand rule is used to find	PHY 102 Past Questions	View
227	In generators, rate of change of flux linkage is maximum when coil is moving th…	PHY 102 Past Questions	View
228	Magnetic flux is	PHY 102 Past Questions	View
229	Two point charges are separated by a distance of 10 cm. One has a charge of -25…	PHY 102 Past Questions	View
230	When a battery, resistor, switch, and inductor form a circuit, and switch is cl…	PHY 102 Past Questions	View
231	The phenomenon of producing an induced emf with the aid of a magnetic field is	PHY 102 Past Questions	View
232	conductor of length L has current I, placed parallel to magnetic field. Force e…	PHY 102 Past Questions	View
233	In order to increase range of ammeter, value of shunt resistance Rs is	PHY 102 Past Questions	View
234	Can magnetic flux lines be seen?	PHY 102 Past Questions	View
235	How much current does a 60W light bulb draw when connected to 240V?	PHY 102 Past Questions	View
236	If separation of plates of a parallel plate capacitor is halved, its capacitanc…	PHY 102 Past Questions	View
237	Ohm’s law can be used only to a ______________ circuit or component	PHY 102 Past Questions	View
238	A length of wire has resistance 10Ω. Resistance of same material, three times l…	PHY 102 Past Questions	View
239	Coil of wire with N turns, area A, in B field, angle φ between normal and B. Wh…	PHY 102 Past Questions	View
240	Length of wire has resistance 10Ω. Same material, three times length, twice are…	PHY 102 Past Questions	View
241	When a magnet is in motion relative to a coil, induced emf does NOT depend upon	PHY 102 Past Questions	View
242	Sinusoidal voltage applied to series RLC: L=10mH, C=100nF, R=20Ω. Quality facto…	PHY 102 Past Questions	View
243	When capacitors are connected in parallel, effective plate area?	PHY 102 Past Questions	View
244	Electric field 2.0 m from point charge is 8.0×10⁴ N/C. Field at 4.0 m?	PHY 102 Past Questions	View
245	Two tuning forks: 256 Hz and 260 Hz. Beat frequency?	PHY 102 Past Questions	View
246	Which is not correct about Gauss’s law? I. net charge = algebraic sum; II. net …	PHY 102 Past Questions	View
247	Copper coil resistance 200Ω at 0°C. Resistance at 80°C? α=0.004041 °C⁻¹.	PHY 102 Past Questions	View
248	6V battery supplies 48W to two identical headlights in parallel. Resistance of …	PHY 102 Past Questions	View
249	Resistance of wire is r Ω. Stretched to double length. New resistance?	PHY 102 Past Questions	View
250	Unraveling an electromagnet gives	PHY 102 Past Questions	View
251	Transformer: primary 500 turns, secondary 1000 turns, primary voltage 240V. Sec…	PHY 102 Past Questions	View
252	When glass rod rubbed with silk (repeat)	PHY 102 Past Questions	View
253	Which is correct about Gauss’ law? If enclosed charge is	PHY 102 Past Questions	View
254	6 mF and 3 mF capacitors in series across 18 V. Charge on each?	PHY 102 Past Questions	View
255	Four wires meet at junction: 4A in, 5A out, 2A out. Fourth carries?	PHY 102 Past Questions	View
256	Calculate the electric field outside a spherical Gaussian surface at a point th…	PHY 102 Past Questions	View
257	Emf induced in a coil rotating in a uniform magnetic field will be maximum when	PHY 102 Past Questions	View
258	Series RLC: R=10Ω, L=0.5H, C=10μF, source 100V, 50Hz. Impedance and phase angle?	PHY 102 Past Questions	View
259	Potential difference across 4Ω resistor is 20V. Heat radiated in 10 seconds?	PHY 102 Past Questions	View
260	Transformer: primary 200 turns, secondary 600 turns, primary current 12A. Secon…	PHY 102 Past Questions	View
261	2-µF and 1-µF capacitors in series from battery, charges P and Q. Then disconne…	PHY 102 Past Questions	View
262	2 m wire in 2×10⁻⁶ T field into page, current 2 A up. Force?	PHY 102 Past Questions	View
263	Parallel plate air capacitor: 0.2 m square plates, 1 cm apart, 50 V battery. Ch…	PHY 102 Past Questions	View
264	Parallel plate air capacitor charged to 100V. 2mm dielectric inserted, distance…	PHY 102 Past Questions	View
265	Wire: 30A, 5cm long, B=0.8T. Maximum force? (repeat)	PHY 102 Past Questions	View
266	Four cells each 1.5V in parallel. Equivalent emf?	PHY 102 Past Questions	View
267	Two point charges 6 cm apart, moved to 3 cm. Force changes by factor?	PHY 102 Past Questions	View
268	Solenoid: 100 turns, length 75 mm, diameter 40 mm, current 12 A. Magnetic induc…	PHY 102 Past Questions	View
269	Electric flux emerging from circular surface radius 0.025 m, E=100 V/m, angle 3…	PHY 102 Past Questions	View
270	Correct units for electric field strength?	PHY 102 Past Questions	View
271	Force on moving charge in uniform B depends on	PHY 102 Past Questions	View
272	Two identical capacitors: air and oil, same charge. Ratio E_air/E_oil?	PHY 102 Past Questions	View
273	Direction of field strength at a point is	PHY 102 Past Questions	View
274	Two point charges: -25µC and +50µC, 10 cm apart. Field at point P, 2 cm from ne…	PHY 102 Past Questions	View
275	Strength of magnetic field of solenoid increased by adding core of	PHY 102 Past Questions	View
276	If electrons flow from earth to a body, body has	PHY 102 Past Questions	View
277	Electric flux maximum when angle between E and A is?	PHY 102 Past Questions	View
278	Electric flux minimum when angle between E and A is?	PHY 102 Past Questions	View
279	Parallel plate air capacitor: plates 0.2 m (area?), spacing 1 cm, 50V. Charge? …	PHY 102 Past Questions	View
280	Rate of electrical energy use measured in	PHY 102 Past Questions	View
281	Two charges repulsive force 96 N. Force when separation quadrupled?	PHY 102 Past Questions	View
282	Which statement in electrostatics is incorrect?	PHY 102 Past Questions	View
283	Voltage 1 kV, charge 500 nC. Capacitance?	PHY 102 Past Questions	View
284	Radioactive substance half-life 2 weeks. Emits 3000 particles/min at start. Aft…	PHY 102 Past Questions	View
285	In series circuit, resistance doubled. Current?	PHY 102 Past Questions	View
286	emf = 16 V induced in coil L=4 H. Rate of change of current?	PHY 102 Past Questions	View
287	Four 2 μF capacitors are connected in series. The equivalent capacitance is:	PHY 102 Past Questions	View
288	Which of the following factors determine(s) the force exerted on a charged body…	PHY 102 Past Questions	View
289	The unit of Capacitance is?	PHY 102 Past Questions	View
290	Answer saved The resonant frequency of a circuit is 1000 kHz. If each of the ca…	PHY 102 Past Questions	View
291	Which of the following cannot be the units of electric intensity?	PHY 102 Past Questions	View
292	Wheatstone bridge is said to be balanced when the current through the galvanome…	PHY 102 Past Questions	View
293	The threshold wavelength of photoelectric emission of a metal is 4000 Å. Minimu…	PHY 102 Past Questions	View
294	Telescope: objective focal length 18 m, eyepiece focal length 10 cm. Angular ma…	PHY 102 Past Questions	View
295	In A.C. circuits, opposition to the flow of current is generally referred to as	PHY 102 Past Questions	View
296	The electric flux Φ is defined as	PHY 102 Past Questions	View
297	Transformer which is 80% efficient gives output of 12 V and 4 A. Input power?	PHY 102 Past Questions	View
298	The algebraic sum of changes in potential difference around any closed path equ…	PHY 102 Past Questions	View
299	The magnetic field pattern produced by a coil carrying direct current is simila…	PHY 102 Past Questions	View
300	The area under the current-time graph is equivalent to	PHY 102 Past Questions	View

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