Physics question and answers for November 25, 2023
- Q A parallel plate capacitor with air between the plates has a capacitance of 8 pF The separation between the plates is now reduced by half and the space between them...
- Q A coil of N turns A area is placed in uniform transverse magnetic field B If it is turn through 180 abor its one of the diameter in 2 seconds...
- Q A circular conducting coil of radius ro having resistance R is placed in a time varying transverse uniform magnetic field B 4t as shown in the figure The current in...
- Q Moving Charges and Magnetism In 8 cm long wire carrying a current of 10 A is olenoid perpendicular to it
- Q Diagram shows two parallel and coaxial loops smaller loop is of radius r Magnetic field due to current i in larger loop radius R r is nearly constant throught the...
- Q Two coils are placed close to each other The mutual inductance of the pair of coils depends upon Question Type Single Correct Type 1 the rates at which currents are...
- Q A electromagnetic wave wave going through a medium is given by E Eosin kx wt B Bosin kx wt then A Ek Bow B If Electric is in Z direction...
- Q A uniform rod AB of mass M is attached to a hinge at one end A and released from rest from t horizontal position The rod rotates about A and...
- Q 2 2 104T 4 4 x 10 T 3 2 10 T A wire has length 1 m radius 2mm and 20000 Find its self inductance 1 2 mH 2...
- Q 0 M 4 In a gravity free region a T shape rigid insulating frame is rotating in its plane about the end of the central bar of length 1 with...
- Q A uniform conducting rod of length is moving with spee Vo in a uniform transverse magnetic field Bo as shown in figure The emf developed across the two ends of...
- Q A uniform conducting rod of length is moving with speed vo in a uniform transverse magnetic field Bo as shown in figure The emf developed across the two ends of...
- Q A flexible conducting loop is in the shape of a circle with radius r The loop is in a uniform magnetic field perpendicular to the plane of the loop To...
- Q 0 a constant force F start acting o on smooth horizontal surface in a region where transverse uniform magnetic field t a at its mid point as shown Potential difference...
- Q In a cylindrical region of radius R there exists a time varying magnetic field B such that dB k 0 A charged particle having charge q is placed at the...
- Q SolveLancer Test Consider a coil of 350 turns having cross section area 1 4 m The coil is placed in a region where magnetic field changes from 0 50 Wb...
- Q In a Faraday disc dynamo a metal disc of radius R rotates with an angular velocity w about an axis perpendicular to the plane of the disc and passing through...
- Q In order to use use a 12 V lamp on a 230 V power line a transformer is applied a Give the number of turns in the secondary coil if...
- Q A conducting wire in the shape Y with each side of length is moving in a uniform magnetic field B with a uniform speed v as shown in figure The...
- Q 9 A coil of resistance 200 ohm and self inductance 1 0 hen has been connected to an a c source of frequency 200 Hz The phase difference between voltage...
- Q A ring is made of wire which has zero resistance The radius of ring is R The ring has magnetic moment m due to flow of current Self inductance of...
- Q AB BC CA L BDC is semicircle A concentric conducting loop circular of radius r is coplanar and concentric with the semicircular Part Current I in the loop ABCD varies...
- Q 1 por A body enters in MRI machine in 10 sec If the magnetic field is 1 5 T and circumference of MRI machine is 0 9 m then find...
- Q 1 a c current 3 Displacement current 4 Reactance A parallel plate capacitor is charged by a battery as shown in the figure If two circular amperian loops x and...
- Q The induced charge does not depend The ends of a search coil having 20 turns area of cross section 1 cm and resistance 2 Q are conne ballistic galvanometer of...
- Q A conductor rod of length L is rotated from one end to w rad sec in the absence of the magnetic field The charge of the free electron inside the...
- Q A copper rod is sliding on two conducting rails that make an angle of 19 with respect to each other as in the drawing The rod is moving to the...
- Q 150 A rod having length I and resistance R is moving with speed v as shown in the figure Find the current through the rod 1 2 3 4 151...
- Q A cubical frame having edge length a each having a resistance R is placed in a gravity free space such that axes are along sides of cube Now a cylindrical...
- Q 1 A parallel circuit consists two ideal inductor of inductance Land 2L and a resistance R At some instant the same current I is flowing in both the inductor in...
- Q A closed loop is moving with constant velocity in uniform magnetic field as shown potential difference and current in element AB are X X X X XB 2 10 T...
- Q The magnetic moment of a thin wire is Am with a current I 0 8A wound tightly on quarte of toroid figure The diameter of the cross section of the...
- Q The energy dissipated in 1000 s P x 1000 s 2 3 10 J 7 An inductor of inductance 100 mH is connected in series with a resistance a variable...
- Q A light bulb and an inductor coil are connected to an ac source through a key as shown in the figure below The key is closed and after sometime an...
- Q A wire in the form of a square of side a carries a current i Then the magnetic induction at the centre of the square wire is Magnetic permeability of...
- Q Two circuits have coefficient of mutual induction of 0 09 henry Average e m f induced in the secondary by a change of current from 0 to 20 ampere in...
- Q An ideal inductor carries a current in the direction shown in the figure The potential of point a is higher than that of point b What can we say about...
- Q t n Two conducting circular loops of radii R and R are placed in the same plane with their centres coinciding If R R the mutual inductance M between them...
- Q The self inductance of a coil is L Keeping the length and area same the number of turns in the coil is increased to four times The self inductance of...
- Q and 115 The axis of symmetry of the ring is same to that of the solenoid The cylindrically symmetric magnetic field ucting zero resistance ring is held above a vertical...
- Q Two coils of self inductance 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other The mutual...
- Q 4 16 mH 15 A coil is wound of a frame of rectangular cross section If the linear dimensions of the frame are doubled and the number of turns per...
- Q A small square shaped loop of edge length is placed at the centre of a circular loop A of radius r with its plane perpendicular to the plane of the...
- Q 3 A uniform rod of mass m is moving with constant velocity vo in a perpendicular uniform magnetic field B as shown The resistance of rod is r The current...
- Q 3 The circuit contains two diodes each with a forward resistance of 50 W and with infinite reverse resistance If the battery voltage is 6 V the current through the...
- Q The rms value of the electric field of the light coming from the sun is 720 N C The average tota energy density of the electromagnetic wave is A 4...
- Q A conducting wheel we three conducting rods of each of length is rotating with constant angular velocity w in a uniform magnetic field B as show in figure The induced...
- Q A conducting wheel in which there are four rods of length is rotating with angular velocity to in a uniform magnetic field B The induced potential difference between its centre...
- Q What type of wave is electromagnetic waves ii A 50 Hz wave is a sinusoidal wave propagating in the z direction with E pointing in the x direction and E...
- Q An ideal conducting rod is moving under the influence of a constant force between two parallel ideal conducting rails There is a capacitor connected between the ends of the two...
- Q Consider the situation shown in figure If the current I in the long straight wire xy is increased at a steady rate the induced current in loop A and B...
- Q A metallic rod completes its circuit as shown in the figure The circuit is normal to a magnetic field of B 0 15 T If the resistance of the circuit...
- Q When a 18 V DC source is applied across a choke coil then a current i 6 A flow in it Now if the same coil is connected to a...
- Q Two physics students are running an investigation where they launch magnets through a coil of wire at different speeds and record the maximum current produced in the coil using a...
- Q x X X X X X X X X X X X X R X X x x X x X X X X x x X X X X...
- Q Self Inductance of a Pair of Parallel Strips Two long parallel metal strips of width are placed at small N separation h h w which carry equal current in opposite...
- Q The mutual inductance of the two fixed coils is 50 H and the current passing through the coil is 6 5 A Determine the flux through the coil which is...
- Q In the circuit shown below the switch S is closed at t 0 Which of the following best represents the voltage across the inductor 1 10 V volt K 5...
- Q In a region of space magnetic field exists in a cylindrical region of radius a centred at origin with magnetic field along negative z direction The field is given by...
- Q In a scries LCR resonance circuit if we change the resistance only from a lower to higher value 1 The bandwidth of resonance circuit will increase mathongo mathongo 2 The...
- Q IT The power dissipated in an AC circuit is zero if the circuit is Question Type Single Correct Type 1 Purely resistive 2 Purely inductive only 3 Either purely inductive...
- Q If a coil of 40 turns and area 4 0 cm is suddenly removed from a magnetic field it is observed that a charge of 2 0 10 C flows...
- Q A choke coil takes a current of 2A lagging 60 behind the applied voltage of200 V at 50Hz i Calculate impedance resistance and inductance of the coil O Z 100...
- Q A transformer has 500 turns of the primary winding and 10 turns of the secondary winding a Determine the secondary voltage if the secondary circuit is open and the primary...
- Q A uniform rod of mass m is moving with constant velocity Vo in a perpendicular uniform magnetic field B as shown The resistance of rod is r The current flowing...
- Q 4 Pascal s The magnetic flux passing through a coil is o 20 cos 5nt 50t 25 weber What wi be the induced emf at t 1 s 1 52...
- Q 3 0 cm T 1 0 nC T 3 0 cm 3 0 cm 1 1 2 0 nC 2 0 nC Three point charges are located at the corners...
- Q 14 At the centre of a large current carrying coll a small coll of resistance R is placed as shown in figure Smal coll is being rotated at a constant...
- Q 16 In the circuit shown E 18 kV C 10 F R 4 M2 R 6M2 R 3 MQ With C completely uncharged switch S is suddenly closed at t...
- Q A circular flat coil with a 2 50 cm radius sits in a horizontal plane There is a vertical time varying magnetic field B t that induces an emf of...
- Q The atomic mass of 2Th is 234 04359 u and that of 23 Pa is 234 04330 u The energy released in the reaction 234 Th 234 Pa will be...
- Q A rectangular loop with a sliding connector of length 1 0 field B m is situated in a uniform magnetic 2T perpendicular to the plane of loop Resistance of connector...
- Q 7 A very long metallic hollow pipe of length 1 and radius r I is carrying charge Q uniformly distributed upon it The pipe is rotated about its axis with...
- Q In a decaying L R circuit the time after which energy stored in the inductor reduces to one fourth of its intitial value is En2 R 1 ln 3 2...
- Q A long solenoid of the cross sectional radius R has a thin insulated wire ring tightly put on its winding One half of the ring has the resistance 10 times...
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