In the diagram given, a coil ‘P’ is connected to a torch bulb and placed parallel to another coil ‘Q’ as shown in figure: Explain the following observations: Bulb gets dimmer if the coil P is moved upwards.

As the magnetic field associated with the coil P decreases, the bulb gets dimmer. Here, the bulb is getting lighten up because of electromagnetic induction.

Why can't two magnetic field lines intersect?

The magnetic field lines do not intersect (or cross) one another. This is due to the fact that the resultant force on a North pole at any point can be only in one direction. But if the two magnetic field lines intersect one another, then the resultant force on a North pole placed at the point of intersection will be along two directions, which is not possible. In other words, no two field-lines are found to cross each other. If they did, it would mean that at the point of intersection, the compass needle would point towards two directions, which is not possible.

E M B I B E

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 20

MEDIUM

10th CBSE

IMPORTANT

Earn 100

Draw a diagram to represent a uniform magnetic field.

Important Questions on Magnetic Effects of Electric Current

EASY

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 21

State the rule to determine the direction of a magnetic field produced around a straight conductor carrying current.

EASY

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 21

State the rule to determine the direction of a force experienced by a current carrying straight conductor placed in a magnetic field which is perpendicular to it.

EASY

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 21

State the rule to determine the direction of a current induced in coil due to its rotation in a magnetic field.

MEDIUM

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 22

How can a magnetic field be produced without using a magnet? Describe an experiment to show that a magnetic field exerts a force on a current carrying conductor.

MEDIUM

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 23

In the diagram given, a coil ‘P’ is connected to a torch bulb and placed parallel to another coil ‘Q’ as shown in figure:

Question Image

Explain the following observation:

(i) Bulb lights.

MEDIUM

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 23

In the diagram given, a coil ‘P’ is connected to a torch bulb and placed parallel to another coil ‘Q’ as shown in figure:
Question Image
Explain the following observations:

Bulb gets dimmer if the coil P is moved upwards.

MEDIUM

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 24

Draw a schematic labelled diagram of a domestic wiring circuit which includes
(i) a main fuse (ii) a power meter(iii) one light point (iv) a power output socket

EASY

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>MOCK TEST QUESTION PAPER>Q 24

In this circuit, on which wire of the circuit is the mains on/off switch connected?