Popular Questions
- What is the resistivity of the material at the temperature of the experiment?
- Determine the temperature coefficient of resistivity of silver.
- A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds t..
- Determine the current in each branch of the network.
- Would the galvanometer show any current?
- A storage battery of emf 8.0 V and internal resistance 0.5 ? is being charged by a 120 V dc supply using a series resistor of 15.5..
- In a potentiometer arrangement, a cell of emf 1.25 V gives a balance point at 35.0 cm length of the wire.
- The number density of free electrons in a copper conductor estimated in Example 3.1 is 8.5 × 1028 m–3.
- The earth’s surface has a negative surface charge density of 10–9 Cm–2.
- What is the current drawn from the supply and its terminal voltage?
- What would you do to obtain a large deflection of the galvanometer?
- A square loop of side 10 cm and resistance 0.5 ohms is placed vertically in the east-west plane.
- A circular coil of radius 10 cm, 500 turns, and resistance 2 ohms is placed with its plane perpendicular to the horizontal compone..
- Determine the direction of induced current in each loop using Lenz’s law.
- A closed loop is held stationary in the magnetic field between the north and south poles of two permanent magnets held fixed. Can ..
- A metallic rod of 1 m length is rotated with a frequency of 50 rev/s, with one end hinged at the centre and the other end at the c..
- A wheel with 10 metallic spokes each 0.5 m long is rotated with a speed of 120 rev/min in a plane normal to the horizontal compone..
- The arm PQ of the rectangular conductor is moved from x = 0, outwards.
- Two concentric circular coils, one of small radius r1 and the other of large radius r2, such that r1 << r2, are placed co-axially ..
- Obtain the expression for the magnetic energy stored in a solenoid in terms of magnetic field B, area A and length l of the soleno..
- What is the maximum voltage generated in the coil?
- Predict the direction of induced current in the situations described by the following Figs.
- Use Lenz’s law to determine the direction of induced current in the situations described by Fig.
- what is the induced emf in the loop while the current is changing?
- A rectangular wire loop of sides 8 cm and 2 cm with a small cut is moving out of a region of uniform magnetic field of magnitude 0..
- A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s–1 about an axis normal to the rod passing through it..
- A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s–1 in a un..
- A horizontal straight wire 10 m long extending from east to west is falling with a speed of 5.0 m s–1, at right angles to the ho..
- Current in a circuit falls from 5.0 A to 0.0 A in 0.1 s.
- A pair of adjacent coils has a mutual inductance of 1.5 H.
- A jet plane is traveling towards the west at a speed of 1800 km/h.
