Energy, Work & Power
1. This question has 3 part(s).
1.1. A drone is a machine that can fly. Fig. 4.1 shows a drone rising into the air, lifting a camera.
The drone obtains energy from a battery of cells.
Complete the sequence of useful energy transfers as the drone rises into the air. One part is done for you.
................................. store → kinetic store → ............................. store
1.2. Extended tier only
The drone can move in any direction up or down, backwards or forwards, left or right. It can also remain stationary above the ground.
Describe the motion and position of the drone when it has both a large quantity of potential energy and a small quantity of kinetic energy.
1.3. When the drone moves, it wastes some energy.
Describe what happens to this energy.
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
Fig. 2.1 shows a fork-lift truck lifting a box.
The electric motor that drives the lifting mechanism is powered by batteries.
Name the store that energy is usefully transferred from by the batteries.
This question has 4 part(s).
The statements describe processes in a coal-fired power station. They are not in the correct order.
A Energy is transferred to the thermal store of the water
B Coal burns releasing energy from its chemical store
C Energy is transferred electrically via the national grid
D A turbine turns coils in a magnetic field
E Steam turns a turbine
Use the letters A, B, C, D and E to complete the flow chart explaining how the power station works.
Suggest two advantages of using solar energy to power the water pump, compared to using a diesel generator.
