Physics question and answers for November 26, 2023
- Q b 3 A uniform magnetic field B points vertically up and is slowly changed in magnitude but not in direction The rate of change of the magnetic field is a...
- Q 3 In the shown figure the mutual inductance of two coils is M the coil II has resistance R and the se inductance L The current in the coil I...
- Q 37 A conductor is moving with the velocity v in the magnetic field and induced current is I If the velocity of conductor becomes double the induced current will be...
- Q 132 21 A closed iron ring is held horizontally and a bar 26 magnet is dropped through the ring with its length along the axis of the ring The acceleration...
- Q While keeping area of cross section of a solenoid same the number of turns and length of solenoid one both doubled The self inductance of the coil will be 1...
- Q d it is given transl 35 When a wire loop is rotated in a magnetic field the direction of induced emf changes in every a one revolution c revolution 4...
- Q A line charge negligible mass with linear charge density A is wound around the circumference of an insulating uniform disc of mass M and radius R It is placed in...
- Q The primary and secondary coils of a transformer have 50 and 1500 turns respectively If the magnetic flux linked with the primary coil is given by where is in weber...
- Q A ring of radius R is rotating about hinge O in vertical plane as shown Uniform magnetic field exist perpendicular to the plane of ring Induced emf between two points...
- Q ho L A rectangular loop of sides 10 cm and 5 cm carrying 4 A a current I of 12 A is placed in different orientations sar as shown in...
- Q A conducting disc of radius a and mass mis kept rotating with a constant angular speed in a horizontal plane about a vertical axis in a uniform vertical magnetic field...
- Q A rectangular loop of sides a and b is placed in x y plane A uniform but time varying magnetic field of strength 20ti 10t i 50k is present in...
- Q A Zener diode of breakdown voltage Vz 10 V is used in the given circuit The current through the load resistor RL is 1 10 A 2 5 A 3...
- Q A coil of wire enclosing an area 100 cm is placed with its plane making an angle 60 with the magnetic field of strength 10 T What is the flux...
- Q nducting loop having a capacitor is moving outward from the magnetic field Which plate of the capacitor will be positive X X X X X X X X X X...
- Q The two rails of a railway track insulated from each other and the ground are connected to a milivoltmeter the earth s magnetic field at the place is 0 4...
- Q In a region of uniform magnetic induction B 10 tesla a circular coil of radius 30 cm and resistance ohm is rotated about an axis that is perpendicular to the...
- Q Q 32 A single phase 50 Hz core type transformer has a core of a cross section area of 400 sq cm The permissible maximum flux density is 1 Wb...
- Q Q 3 RMS value of emf per turn Form factor Average emf per turn Therefore RMS value of emf per turn per turn 1 11 x 4f om 4 44f...
- Q Q 22 The transformer does this by linking together two or more electrical circuits using a common oscillating magnetic circuit which is produced by the transformer itself A transformer operates...
- Q An inductor of inductance L 400 mH and resistors of R 2 and R 22 are connected to a battery emf 12 V as shown in the figure The internal...
- Q 35 Two transformers are arranged as shown The primary of the transformer to the left which has N number of turns is connected to a 120 V ac supply The...
- Q Q 37 A single phase 50 Hz core type transformer has a core of a cross section area of 400 sq cm The permissible maximum flux density is 1 Wb...
- Q A solenoid have the self inductance 2H If length of the solenoid is doubled having turn density and area constant then new self inductance is 1 4H 2 1H 3...
- Q 2 16 0 A s 3 1 6 A s 4 Two coils A and B having turns 300 and 600 respectively are placed near each other on passing a...
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