Question

Q7.

i) A solenoid of length 0.5 meter, with winding of 800 turns,
uniformly distributed over its length, to

produce a magnetic field of order 2.0 × 10-4 T, at its centre.
Discuss the effect and the value of electric

current, if its length increased by two times and put your
observation regarding the behaviour of electric

current, if solenoid immersed in a liquid having high relative
permeability, give your justifications.

(Given: μ0 = 4π × 10−7 T.m/A).

ii) You are investigating electromagnetic effects using coil
and magnets. When a wire of length 20 cm bent into circular current
carrying loop which kept in magnetic field 0.2 and 5 A flows
through it. Suggest the magnitude of force and rotational force
acting on the coil. If this coil is linear, what will be the force?
In this experiment, a wire of length 20 cm is bent in the form of a
square coil of single turn which carries a current 5 A is placed in
a magnetic field of 0.2 T. How can you predict the maximum
rotational force experienced by the coil? Compare the effects and
predict which coil has more rotational force.

Justify your results.

(5.0 Marks)

Answer #1

1. A long, current-carrying solenoid with an air core has 1650
turns per meter of length and a radius of 0.0220 m. A coil of 100
turns is wrapped tightly around the outside of the solenoid, so it
has virtually the same radius as the solenoid. What is the mutual
inductance of this system?
2. A generator uses a coil that has 360 turns and a 0.53-T
magnetic field. The frequency of this generator is 60.0 Hz, and its
emf...

1. To construct a solenoid, you wrap insulated wire uniformly
around a plastic tube 8.7 cm in diameter and 30 cm in length. You
would like a 3.0 A current to produce a 2.5 kG magnetic field
inside your solenoid. What is the total length of wire you will
need to meet these specifications?
2. Experiments carried out on the television show Mythbusters
determined that a magnetic field of 1000 gauss is needed to corrupt
the information on a credit...

Where n is the number of turns per unit length, μo is the
magnetic permeability of free space (4π x 10-7 SI), and I is the
current (amps), determine n and the total number of turns in the
solenoid, N. Remember that in the equation above B is in units of
Tesla (T). Show all your calculations here.
Data from graph of B vs Current: m= 3.7599 b= 0.0538 correlation
=0.9977
Voltage (V)
Current (A)
B-Field (T)
0
0
0...

A heater is being designed that uses a coil of nichrome wire (ρ
= 100x10-8 Ω·m) to generate 100 W using a voltage of
V=220V. The wire is 2000 m long. What cross sectional area should
the wire have?
None of the above
1.7e-2 m2
7.23e-4 m2
4.13e-6 m2
2.06e-3 m2
What is the magnification of a converging lens with a focal
length of 7.5 cm when an object is held 5 cm from it?
3.00
2.14
1.36
5.00
None...

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