A total RAM size of 2048 is attached to a system with 128x8 RAM size, in this arrangement which of the following points will be true? ROM selection will be of 5 linesIf ROM of 512x9 is attached in this system, at least certain lines will be similarIf ROM and RAM are attached, RAM requires more data linesDecoder for RAM requires 2 inputs

The question seems to be about computer memory architecture, specifically about RAM and ROM. Here's a step-by-step analysis of the points:

1. "A total RAM size of 2048 is attached to a system with 128x8 RAM size": This means that the system has a total of 2048 memory locations, each of which can store 8 bits of data. The 128x8 configuration suggests that there are 128 rows and 8 columns, which would only account for 1024 memory locations. This seems to be a contradiction.

2. "ROM selection will be of 5 lines": This suggests that the ROM (Read-Only Memory) uses 5 address lines. Since 2^5 = 32, this would allow for 32 different memory locations to be selected.

3. "If ROM of 512x9 is attached in this system, at least certain lines will be similar": This suggests that if a ROM with 512 memory locations, each of which can store 9 bits of data, is added to the system, there will be some overlap in the address lines used by the RAM and the ROM.

4. "If ROM and RAM are attached, RAM requires more data lines": This is likely true, as the RAM in this system has more memory locations and each location stores the same amount of data as the ROM.

5. "Decoder for RAM requires 2 inputs": This seems to be incorrect. A decoder for a RAM of this size would require more than 2 inputs. Specifically, it would need enough inputs to select from among the 2048 memory locations. This would require 11 inputs, since 2^11 = 2048.

This seems like a set of physics and electronics questions. Here are the answers:

i. The acceleration due to gravity 'g' can be calculated using the formula for the period of a pendulum: T = 2π√(l/g). Rearranging for 'g' gives g = 4π²l/T². Substituting the given values gives g = 4π²(1)/(2.01)² = 9.78 m/s².

OR

Coulomb's law states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. The formula is F = k(q1q2)/r², where F is the force, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

ii. Yes, a concave mirror will always produce an inverted real image.

OR

A person suffering from farsightedness would use convex lenses. These lenses correct the problem by converging light before it reaches the eye, allowing the eye to focus on distant objects.

iii. A body can be negatively charged by electrostatic induction by bringing a negatively charged object close to it, but not touching it. This causes the electrons in the body to be repelled to the far side, leaving the near side positively charged.

OR

Capacitors are used in various electric appliances for energy storage, power conditioning, and signal coupling or decoupling.

iv. When waves move from deep to shallow water, their speed decreases, their frequency remains the same, and their wavelength decreases.

OR

Sound produced on the sun is not heard on earth because there is no medium in space for the sound waves to travel through.

v. Two wires carrying current in the same direction will attract each other. This is due to the magnetic fields produced by the currents, which interact to produce a force.

OR

Capacitance is the ability of a system to store an electric charge. Its unit is the farad (F).

vi. An ammeter is connected in series with a device to measure the current flowing through it. This is because current is the same at all points in a series circuit.

OR

The NOR gate is a digital logic gate that outputs true or "1" only when both of its inputs are false or "0". Its symbol is a OR gate with a small circle on its output line, and its truth table is: A B | Q 0 0 | 1 0 1 | 0 1 0 | 0 1 1 | 0

vii. Digital quantities are discrete and can only take on a finite number of values, while analogue quantities are continuous and can take on any value within a certain range.

OR

A hard disk is more reliable for data storage than a floppy disk because it has a larger storage capacity, faster access times, and is less prone to damage.

viii. The current rating of the fuse can be calculated using the formula P = IV, where P is power, I is current, and V is voltage. Rearranging for I gives I = P/V. Substituting the given values gives I = 2500/230 = 10.87 A. The closest available fuse rating is 13 A.

OR

A CRO, or cathode ray oscilloscope, is a device used to display and analyse the waveform of electronic signals. Its working principle is based on the deflection of electrons by electric and magnetic fields. One use of a CRO is to measure the frequency of an electronic signal.