Objective Questions

Questions (1819)

#	Question	Topic	Actions
401	A car battery is rated at 80 A.h. An ampere-hour is a unit of:	Test Compilation PHY 102 25	View
402	How much current does a 60 W light bulb draw when connected to a voltage of 240…	Test Compilation PHY 102 25	View
403	Two identical batteries, each with emf 18 V and internal resistance 1 ohm, are …	Test Compilation PHY 102 25	View
404	In Fleming's left-hand rule, the thumb shows the direction of:	Test Compilation PHY 102 25	View
405	A conductor of length L has current I passing through it. When it is placed PAR…	Test Compilation PHY 102 25	View
406	Which among the following quantities is not affected by the magnetic field?	Test Compilation PHY 102 25	View
407	F = BIL can only be used if the magnetic field and electric current are:	Test Compilation PHY 102 25	View
408	Two long parallel wires are 40 mm apart. If currents of 20 A and 30 A are appli…	Test Compilation PHY 102 25	View
409	What is the name given to the current that is induced when a metal sheet is pul…	Test Compilation PHY 102 25	View
410	A coil has 45 turns and an area of 1.8x10-2 m2. If the torque on the coil is 2.…	Test Compilation PHY 102 25	View
411	Calculate the force on a wire of length 5 cm carrying a current of 30 A if it i…	Test Compilation PHY 102 25	View
412	A wire of length 2.5 m carrying a current of 1.3 A is inclined at an angle thet…	Test Compilation PHY 102 25	View
413	Force per metre on two wires carrying a current of 1 A placed 1 m apart is equa…	Test Compilation PHY 102 25	View
414	A current of 3 A flows through a 1 m long conductor. Calculate the force experi…	Test Compilation PHY 102 25	View
415	Direction of conventional current is	Test Compilation PHY 102 25	View
416	A galvanometer of 50 ohms gives full scale deflection with 2 mA current. To con…	Test Compilation PHY 102 25	View
417	An electric motor is connected to a 240 V mains supply. The armature draws 15 A…	Test Compilation PHY 102 25	View
418	Emf induced in a coil rotating in a uniform magnetic field will be maximum when:	Test Compilation PHY 102 25	View
419	The induced emf when the magnetic field, length and velocity of the conductor a…	Test Compilation PHY 102 25	View
420	Lenz's law states that the direction of the induced e.m.f. and hence current:	Test Compilation PHY 102 25	View
421	An alternating voltage whose peak value is 80 volts is connected across a 60 oh…	Test Compilation PHY 102 25	View
422	A series R-L-C circuit has R = 10 ohms, L = 0.5 H and C = 10 uF. Calculate the …	Test Compilation PHY 102 25	View
423	A pressing iron is rated 240 V, 1200 W, 50 Hz. What is the peak current it draw…	Test Compilation PHY 102 25	View
424	The equation of a current is given by i = I sin(2wt). The frequency of the curr…	Test Compilation PHY 102 25	View
425	Resistivity of a wire depends on:	Test Compilation PHY 102 25	View
426	Calculate the ratio of the resistivity of 2 wires having the same length and sa…	Test Compilation PHY 102 25	View
427	The reciprocal of resistivity is:	Test Compilation PHY 102 25	View
428	As compared to short wires, long wires have ......	Test Compilation PHY 102 25	View
429	What is the unit of temperature coefficient (of resistance)?	Test Compilation PHY 102 25	View
430	In a.c. circuit phasor diagrams, which quantity is taken as the vector referenc…	Test Compilation PHY 102 25	View
431	By accelerating a magnet inside a coil, the current in it:	Test Compilation PHY 102 25	View
432	What happens to the current in a series circuit if the resistance is doubled?	Test Compilation PHY 102 25	View
433	A copper coil has a resistance of 200 ohms at 0 degC. Calculate its resistance …	Test Compilation PHY 102 26	View
434	A 60 ohm resistor is connected in series with a 120 ohm resistor. What is the e…	Test Compilation PHY 102 26	View
435	Ohm's law can be applied only to a __________ circuit or component:	Test Compilation PHY 102 26	View
436	In A.C. circuits, one of the following statements is INCORRECT:	Test Compilation PHY 102 26	View
437	For an ohmic resistor, resistance is the proportionality constant for:	Test Compilation PHY 102 26	View
438	The fuse in the lighting circuit of a house would most probably be made of:	Test Compilation PHY 102 26	View
439	The force existing between two parallel current-carrying conductors is F. If th…	Test Compilation PHY 102 26	View
440	An inductor L = 1 H in series with a resistor R = 150 ohms is connected to an A…	Test Compilation PHY 102 26	View
441	Two wires A and B with circular cross-sections have identical lengths and are m…	Test Compilation PHY 102 26	View
442	The resistance of a pure metal:	Test Compilation PHY 102 26	View
443	A wire of resistance 2 Ohm is stretched uniformly to twice its original length.…	Test Compilation PHY 102 26	View
444	A 30 cm long solenoid has 2000 turns of wire on an iron rod whose cross-section…	Test Compilation PHY 102 26	View
445	A wire carries a current of 30 A. If the wire is 5 cm long, what is the magnitu…	Test Compilation PHY 102 26	View
446	A length of wire has a resistance of 10 Ohm. What is the resistance of a wire o…	Test Compilation PHY 102 26	View
447	When a magnet is in motion relative to a coil, the induced e.m.f. does not depe…	Test Compilation PHY 102 26	View
448	A magnetic induction of 20 uT is applied by a long straight current-carrying wi…	Test Compilation PHY 102 26	View
449	Materials having a non-linear voltage-current relationship are	Test Compilation PHY 102 26	View
450	Calculate the equivalent resistance between A and B. [figure: 5, 10, 15, 20 ohm]	Test Compilation PHY 102 26	View
451	A long wire carries a current toward the north in a magnetic field that is dire…	Test Compilation PHY 102 26	View
452	A capacitor of 22 uF and a resistor of 200 Ohm are connected in series across a…	Test Compilation PHY 102 26	View
453	The equation of a sinusoidal waveform is given by I = 15 sin(wt). Calculate the…	Test Compilation PHY 102 26	View
454	Find the maximum torque on a 100-turn square loop of wire, 10.0 cm on a side, t…	Test Compilation PHY 102 26	View
455	Calculate the resonant frequency of a R-C-L series circuit with R = 300 Ohm, C …	Test Compilation PHY 102 26	View
456	The unit of resistivity is?	Test Compilation PHY 102 26	View
457	A 2 m wire is in a 2x10-6 T magnetic field pointing into the page. It carries 2…	Test Compilation PHY 102 26	View
458	If the flow of electric current is parallel to the magnetic field, the force wi…	Test Compilation PHY 102 26	View
459	A battery of emf 4 V and internal resistance of 2 Ohm is joined to a resistor o…	Test Compilation PHY 102 26	View
460	A 200 V battery fully charges a capacitor of capacitance C. It is then discharg…	Test Compilation PHY 102 26	View
461	The current measured at the secondary of a 240V/12V transformer is 2 A. Calcula…	Test Compilation PHY 102 26	View
462	If we reverse direction of electric current, then direction of magnetic field w…	Test Compilation PHY 102 26	View
463	Which one of the following options will NOT result in an induced current? (	Test Compilation PHY 102 26	View
464	The apparent power developed in an R-L a.c. circuit is 30 VA. If the source is …	Test Compilation PHY 102 26	View
465	A copper bar 30 cm long is perpendicular to a field of 0.8 T and moves at right…	Test Compilation PHY 102 26	View
466	A resistor, 100 Ohm, is connected to an a.c. source given as v = 300 sin(wt). I…	Test Compilation PHY 102 26	View
467	Lines of the magnetic field produced by a long straight wire carrying a current…	Test Compilation PHY 102 26	View
468	There is no induced current in the coil when the magnet in the coil stops movin…	Test Compilation PHY 102 26	View
469	Two electric bulbs have resistances in the ratio 1:2. If they are joined in ser…	Test Compilation PHY 102 26	View
470	A 120-V power line is protected by a 15-A fuse. What is the maximum number of "…	Test Compilation PHY 102 26	View
471	A coil of wire with N turns and area A is placed into a magnetic field of magni…	Test Compilation PHY 102 26	View
472	If the resistance of a wire is r Ohm, and the wire is stretched to double its l…	Test Compilation PHY 102 26	View
473	Which of the following is the best way to demagnetise a magnetised steel needle?	Test Compilation PHY 102 26	View
474	A capacitor has a capacitance of 4.0 uF and is charged through a resistor of re…	Test Compilation PHY 102 26	View
475	A series R-L-C circuit has R=10 Ohm, L=0.5H and C=10 uF. Calculate the impedanc…	Test Compilation PHY 102 26	View
476	A loop of wire of 25 turns has an area of 2.0x10-2 m2. A current of 1.25A flows…	Test Compilation PHY 102 26	View
477	A Wheatstone bridge is said to be balanced when the current through the galvano…	Test Compilation PHY 102 26	View
478	In A.C. circuits, opposition to the flow of current is generally referred to as	Test Compilation PHY 102 26	View
479	A resistor 20 Ohm and an inductor 500mH are connected in series across a 120V 5…	Test Compilation PHY 102 26	View
480	Magnitude of induced e.m.f is proportional to	Test Compilation PHY 102 26	View
481	A straight wire of length 0.20 m moves at a speed of 3.0 m/s at 90 degrees to a…	Test Compilation PHY 102 26	View
482	A straight conductor of length 25cm moves with a velocity of 30m/s in a magneti…	Test Compilation PHY 102 26	View
483	A 60-watt light bulb carries a current of 0.5 A. The total charge passing throu…	Test Compilation PHY 102 26	View
484	An inductor, L = 0.5H, in series with a resistor, R = 250 Ohm, are connected to…	Test Compilation PHY 102 26	View
485	In a coil of wire, the direction of the induced current caused by an increasing…	Test Compilation PHY 102 26	View
486	The emf of a battery is equal to its terminal potential difference:	Test Compilation PHY 102 26	View
487	The flow of charge per unit time defines	Test Compilation PHY 102 26	View
488	Field which does not have magnetic poles is	Test Compilation PHY 102 26	View
489	When the current flowing in a coil is doubled and the number of turns of the co…	Test Compilation PHY 102 26	View
490	A proton has a magnetic field due to its spin on its axis. The field is similar…	Test Compilation PHY 102 26	View
491	Derived unit Tesla is related to:	Test Compilation PHY 102 26	View
492	The force on an electron moving in a magnetic field of strength 0.25 T is 3.2x1…	Test Compilation PHY 102 27	View
493	Fleming's left-hand rule is used to find	Test Compilation PHY 102 27	View
494	A charged particle is placed in a uniform magnetic field and negligible gravita…	Test Compilation PHY 102 27	View
495	If Earth's magnetic field lines pass through a Hall probe in the opposite direc…	Test Compilation PHY 102 27	View
496	A solenoid of 100 turns is 75 mm in length, has a diameter of 40 mm with a curr…	Test Compilation PHY 102 27	View
497	1 Tesla is equal to:	Test Compilation PHY 102 27	View
498	The radius R of the circular path of an electron with mass M and charge q movin…	Test Compilation PHY 102 27	View
499	How can a magnetic field be produced?	Test Compilation PHY 102 27	View
500	A galvanometer has spring constant k, magnetic field B, and deflection angle th…	Test Compilation PHY 102 27	View

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Questions (1819)