Physics
The above circuit diagram illustrates a copper bar placed on two copper wires stretched over a wooden base placed between two poles of magnets. This entire setup is placed on a compression balance, which shows a weight of 0.4 kgf.
(a) What will be the observation of the compression balance when we close the switch?
(b) How will this observation change, when we increase the current in the circuit?
(c) Name the rule used to come to the conclusion in (a).
Electro-Magnetism
1 Like
Answer
(a) The reading on the compression balance will increase.
(b) The reading on the compression balance will increase.
(c) Fleming’s left-hand rule.
Explanation:
When the switch is closed, current flows through the copper bar in a magnetic field. This causes a Lorentz force (also called the magnetic force) to act on the conductor. This force is perpendicular to both the direction of current and the magnetic field. Due to this, the copper bar experiences a downward force, causing the compression balance reading to increase.
Answered By
3 Likes
Related Questions
Study the diagram and answer the following:
(a) Arrange the following pendulums according to their natural frequencies (use < > =).
(b) If Pendulum Z is initiated into oscillation, which pendulum among the others will exhibit the highest amplitude of vibration?
(c) Give reasons for your answer.
In the physics laboratory, various blocks of materials labelled A and B, each with masses ranging from 10 grams to 50 grams, are utilised to determine their respective heat capacities. Subsequently, a graph is plotted to depict the relationship between the heat capacity and the mass of the materials, as shown.
(a) Plot a graph illustrating the relationship between the mass and specific heat capacity of materials A and B.
(b) Which material is a relatively better conductor?
Bandish and Parag, on a trek to Sandakpu, halted at a tea house in Tumbling. The picture above shows the entrance door of the tea house. They saw the tumbrel filled with water hanging from top rigid support passing through the door. On enquiring about the tumbrel, the owner of the tea house, he said that it acts as a pullback (door closure) after opening and releasing the door.
(a) Explain how the tumbrel helps to close the door on its own.
(b) Name the principle involved.
A convex lens of power +5 D has an object placed at a distance of 50 cm in front of the lens.
(a) State the nature of the image formed.
(b) What is the definite distance, towards or away from the lens, the object should move so that the image is not seen?