Step 1: Understanding the role of the CPU.
The Central Processing Unit (CPU) is often referred to as the 'heart' of the computer, as it performs the bulk of the processing tasks.
Step 2: Analyzing the options.
- (A) CPU: The CPU is the correct answer. It executes instructions that drive the computer's functionality.
- (B) Mother Board: The motherboard connects all the components, but it is not the heart of the computer.
- (C) Speaker: The speaker is an output device, not the heart of the computer.
- (D) Scanner: A scanner is an input device, and it is not central to the computer's function.
Step 3: Conclusion.
The correct answer is (A) CPU.
A weight of $500\,$N is held on a smooth plane inclined at $30^\circ$ to the horizontal by a force $P$ acting at $30^\circ$ to the inclined plane as shown. Then the value of force $P$ is:
A steel wire of $20$ mm diameter is bent into a circular shape of $10$ m radius. If modulus of elasticity of wire is $2\times10^{5}\ \text{N/mm}^2$, then the maximum bending stress induced in wire is: