FBISE, NCP & NBF-aligned resources for Classes 9–12
Browse by Class
Browse by Type
Physics Chapter 12 : Topic 8
Magnetic Field Patterns
1 / 35
The magnetic field around a long straight current-carrying wire consists of:
Reasoning: A current-carrying straight wire produces concentric circular magnetic field lines around the wire.
2 / 35
The direction of the magnetic field around a straight current-carrying wire is found by:
Reasoning: The right-hand grip rule gives the direction of magnetic field around a current-carrying conductor.
3 / 35
According to the right-hand grip rule, the thumb represents:
Reasoning: The thumb points in the direction of conventional current.
4 / 35
According to the right-hand grip rule, curled fingers represent:
Reasoning: The curled fingers show the direction of magnetic field lines around the conductor.
5 / 35
If the current in a straight wire is increased, the magnetic field:
Reasoning: Magnetic field strength is directly proportional to current.
6 / 35
The magnetic field strength around a straight wire decreases when:
Reasoning: Magnetic field becomes weaker as distance from the wire increases.
7 / 35
The magnetic field lines around a straight wire are closest together:
Reasoning: Closely spaced field lines represent stronger magnetic fields near the wire.
8 / 35
A straight wire carrying current upward produces magnetic field lines that are:
Reasoning: The magnetic field around a straight conductor forms concentric circles.
9 / 35
If the direction of current in a straight wire is reversed, the magnetic field:
Reasoning: Reversing current reverses the direction of magnetic field.
10 / 35
The magnetic field pattern of a flat circular coil is similar to:
Reasoning: A current-carrying circular coil produces a magnetic field pattern similar to a bar magnet.
11 / 35
The magnetic field at the centre of a circular coil is:
Reasoning: Magnetic fields from all parts of the coil add together at the centre.
12 / 35
The magnetic field lines through the centre of a circular coil are:
Reasoning: Near the centre, the field lines are approximately straight and uniform.
13 / 35
Increasing the number of turns in a circular coil will:
Reasoning: More turns produce stronger combined magnetic fields.
14 / 35
The direction of magnetic field through a circular coil can be found using:
Reasoning: Curl fingers in direction of current; thumb gives magnetic field direction.
15 / 35
The strength of the magnetic field of a circular coil increases when:
16 / 35
A circular coil carrying current behaves like:
Reasoning: The coil has north and south poles like a bar magnet.
17 / 35
A long solenoid is made by:
Reasoning: A solenoid consists of many closely spaced turns of wire.
18 / 35
The magnetic field inside a long solenoid is:
Reasoning: A long solenoid produces a strong, uniform magnetic field inside.
19 / 35
The magnetic field outside an ideal long solenoid is:
Reasoning: Field lines are concentrated inside a long solenoid.
20 / 35
The magnetic field pattern of a solenoid resembles:
Reasoning: A solenoid has north and south poles like a bar magnet.
21 / 35
Increasing the number of turns per unit length of a solenoid:
Reasoning: More turns per unit length produce a stronger magnetic field.
22 / 35
The magnetic field inside a solenoid becomes stronger when:
Reasoning: Magnetic field strength is proportional to current.
23 / 35
A soft iron core is inserted into a solenoid to:
Reasoning: Soft iron increases magnetic field by becoming magnetized.
24 / 35
Field lines in a solenoid inside region are drawn:
Reasoning: Parallel, closely spaced lines indicate a strong uniform field.
25 / 35
Which device uses the magnetic field pattern of a solenoid?
Reasoning: Solenoids are used to create electromagnets.
26 / 35
The magnetic field pattern around a current-carrying straight wire shows that:
Reasoning: Moving charges in a current produce magnetic fields.
27 / 35
If a compass is placed near a current-carrying wire, it will:
Reasoning: A compass needle responds to magnetic fields.
28 / 35
Comparing a straight wire and a solenoid, the solenoid produces a stronger field because:
Reasoning: The magnetic fields of many turns combine to produce a stronger field.
29 / 35
The magnetic field lines of a bar magnet and a solenoid are similar because both have:
Reasoning: Both produce dipole magnetic field patterns.
30 / 35
Which statement about magnetic field patterns is correct?
Reasoning: The density of field lines represents the strength of the magnetic field.
31 / 35
The magnetic field produced by a current-carrying circular coil becomes stronger if:
Reasoning: More turns increase the combined magnetic field.
32 / 35
A long straight wire and a solenoid differ because:
Reasoning: Their field patterns depend on the geometry of current flow.
33 / 35
If current direction in a solenoid is reversed:
Reasoning: Reversing current reverses the direction of the magnetic field.
34 / 35
The strongest magnetic field region of a solenoid is:
Reasoning: Field lines are concentrated inside a solenoid.
35 / 35
Magnetic field patterns are represented using:
Reasoning: Field lines show the direction and strength of magnetic fields.
Your score is
Restart quiz
