Energy Transformation and Conservation Quiz

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In what type of motion does the velocity change by equal amounts in equal time intervals?

Uniform acceleration (correct)

Uniform motion

Non-uniform acceleration

Non-uniform motion

What is a characteristic of the velocity-time graph for all uniformly accelerated motions?

It is a straight line (correct)

It is sinusoidal

It is a curve

It is parabolic

In non-uniformly accelerated motions, how can the velocity-time graph vary?

Sinusoidal shape

Always a straight line

Parabolic shape (correct)

Triangle shape

What does the graph in figure 1.8 indicate about uniform acceleration in motion?

Velocity changes by equal amounts in equal time intervals Signup and view all the answers

What distinguishes the car's velocity in the given example from that of a train?

Car's velocity is continuously changing due to uniform acceleration Signup and view all the answers

How does the distance-time graph differ for uniform and non-uniform motion?

Non-uniform motion has varying slopes on the graph Signup and view all the answers

What is the purpose of using nichrome wire XY in the experiment?

To act as the resistance Signup and view all the answers

In the experiment, what does the observation chart help in recording?

Current and potential difference readings Signup and view all the answers

Based on Ohm's Law, what happens to current when voltage is increased?

Current increases Signup and view all the answers

What is the resistance of the conductor in the example provided with a potential difference of 24 V and current of 0.24 A?

100 Ω Signup and view all the answers

In Example 3, what is given to calculate the current flowing through the filament of the light bulb?

Power (W) Signup and view all the answers

What is determined by drawing a graph between current and potential difference in the experiment?

Resistance of the nichrome wire Signup and view all the answers

What is the law of conservation of energy?

Energy can only be transferred between forms, not created or destroyed Signup and view all the answers

How does energy transfer between the two pendulums in the provided experiment?

By transferring kinetic energy through the thread Signup and view all the answers

What form of energy is present when an object is falling freely due to gravity?

Mechanical energy Signup and view all the answers

In the provided diagram, what type of energy conversion is represented by the Secondary cell?

Chemical to electrical energy Signup and view all the answers

What would happen to the energy level if the two pendulums in the experiment had different lengths?

Energy transfer would not occur Signup and view all the answers

What principle governs how energy transformations occur as per the provided text?

Law of Conservation of Energy Signup and view all the answers

In the context of the artificial satellite moving around the Earth in a circular orbit, why is the work done by the gravitational force considered zero?

The gravitational force and the displacement are perpendicular to each other. Signup and view all the answers

What is the main objective of the National Physical Laboratory in New Delhi?

To establish national standards of various physical quantities. Signup and view all the answers

If Pravin applies a force of 100 N at an angle of 60 degrees to take an object of mass 20 kg to a height of 10 m horizontally, what is the work done?

400 J Signup and view all the answers

How is work related to displacement in the context of Pravin's applied force?

Work is directly proportional to displacement. Signup and view all the answers

What is the relationship between the applied force and the displacement when work is calculated?

Force and displacement must be in the same direction. Signup and view all the answers

In what scenario would the work done by a force be zero?

The angle between force and displacement is 90 degrees. Signup and view all the answers

What is the resistivity of the material of the conducting wire in Example 2?

4.71 x 10^-5 W m Signup and view all the answers

What is the current flowing through the appliance in Example 4?

0.3 A Signup and view all the answers

How much potential difference should be applied across the two ends of the appliance with a resistance of 500 W in Example 4?

150 V Signup and view all the answers

What is the resistance of the copper wire in Example 5?

2.5 W Signup and view all the answers

If the potential difference across an appliance is 25 V and the resistance is 50 W, what is the current flowing through it?

1 A Signup and view all the answers

If a wire has a resistance of 20 W and a current of 5 A flowing through it, what is the voltage across its ends?

100 V Signup and view all the answers