Match List I with List II: Choose the most appropriate answer from the options given below:List I (Quantities) List II (Units) (A) Force (I) Coulomb (B) Charge (II) Hertz (C) Heat (III) Newton (D) Frequency (IV) Joule
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
Matching Physical Quantities with Their SI Units
This question asks us to match physical quantities given in List I with their corresponding standard units given in List II. Understanding the standard units for common physical quantities is fundamental in physics and science.
Let's analyze each quantity in List I and find its correct unit from List II:
- Force: Force is an interaction that can change the motion of an object. The standard unit of force in the International System of Units (SI) is the Newton. Looking at List II, (III) Newton is the correct unit for Force. So, (A) matches with (III).
- Charge: Electric charge is a fundamental property of matter. The standard unit of electric charge in the SI system is the Coulomb. From List II, (I) Coulomb is the correct unit for Charge. So, (B) matches with (I).
- Heat: Heat is a form of energy transferred due to a temperature difference. Energy is measured in Joules in the SI system, and heat, being a form of energy, is also measured in Joules. From List II, (IV) Joule is a unit of energy (and heat). So, (C) matches with (IV).
- Frequency: Frequency is the number of occurrences of a repeating event per unit of time. It is often used to describe oscillations or waves. The standard unit of frequency in the SI system is the Hertz, which is equal to one cycle per second. From List II, (II) Hertz is the correct unit for Frequency. So, (D) matches with (II).
Based on this analysis, the correct matching is:
- (A) Force - (III) Newton
- (B) Charge - (I) Coulomb
- (C) Heat - (IV) Joule
- (D) Frequency - (II) Hertz
Let's represent this matching in a table for clarity:
| List I (Quantities) | List II (Units) | Match |
|---|---|---|
| (A) Force | (I) Coulomb | (A) matches (III) |
| (B) Charge | (II) Hertz | (B) matches (I) |
| (C) Heat | (III) Newton | (C) matches (IV) |
| (D) Frequency | (IV) Joule | (D) matches (II) |
Therefore, the required combination is (A)-(III), (B)-(I), (C)-(IV), (D)-(II).
Revision Table: Physical Quantities and SI Units
| Physical Quantity | SI Unit | Symbol |
|---|---|---|
| Force | Newton | N |
| Charge | Coulomb | C |
| Heat (Energy) | Joule | J |
| Frequency | Hertz | Hz |
Additional Information on SI Units and Physical Quantities
The International System of Units (SI) is the modern form of the metric system and is the most widely used system of measurement. It consists of seven base units and a set of derived units.
- Base Units: These are the fundamental units from which all other units are derived. Examples include meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (thermodynamic temperature), mole (amount of substance), and candela (luminous intensity).
- Derived Units: These units are formed by combining base units. For example, the unit of force (Newton) is derived from kilograms, meters, and seconds ($\text{1 N} = \text{1 kg} \cdot \text{m/s}^2$). Similarly, the unit of energy (Joule) is derived ($\text{1 J} = \text{1 N} \cdot \text{m} = \text{1 kg} \cdot \text{m}^2\text{/s}^2$). The unit of charge (Coulomb) is derived from the ampere and second ($\text{1 C} = \text{1 A} \cdot \text{s}$). The unit of frequency (Hertz) is derived from the second ($\text{1 Hz} = \text{1/s}$).
Understanding the units helps in checking the dimensions of equations and ensuring consistency in calculations in physics and engineering.
Important Questions from Sitting Arrangement
Four students P, Q, R, and S are playing Carrom. In this game, P makes a pair with R, and Q makes a pair with S. S is the right of R whose face is towards west. Which direction is S facing?
Read the following information carefully to answer the given question. Five friends P, Q, R, S, and T are sitting on a bench and wearing different coloured jackets, i.e., brown, red, yellow, white, and grey (not necessarily in the order). (A) P is sitting next to Q and wearing a red jacket. (B) R is sitting next to S and not wearing either a brown or grey jacket. (C) S is not sitting with T and T is wearing a brown jacket. (D) T is on the left end of the bench. (E) R is on the second position from the right. (F) P is on the right of Q and T, and Q is wearing a grey jacket. (G) P and R are sitting together. (H) S is not wearing a white jacket. What is the color of R’s jacket?
Six persons A, B, C, D, E, and F are sitting in two parallel rows of three persons in each row, all facing north. C is sitting to the right of E. B is sitting to the right of D, who is sitting opposite to A. F is sitting diagonally opposite to A, who is at the left of E. Who is sitting opposite to B?
Which of the following is not a member of ‘SAARC’?
Five students are standing in a circle and facing the center. Ajay is between Amar and Aman. Alok is on the left of Amit. Amar is on the immediate left of Alok. Who is sitting immediate right of Ajay?
