✅ Correct Answer (FALSE statement): “The frequency (f) of its revolution will increase.”

Explanation

A charged particle moving perpendicular to a uniform magnetic field follows a circular path with:

Radius of circular path

True statement

Magnetic force

Since v increases → Force increases.

True statement

4️⃣ Frequency of revolution

Notice: frequency does NOT depend on speed or kinetic energy — only on charge, mass, and magnetic field.

So even if K doubles,

Therefore the statement

The frequency will increase” is FALSE.

✅ Final Answer: The frequency of its revolution will increase. (FALSE)

Let's verify why the intersection contains three points.

To find:

Number of intersection points of the circle and the parabola.

Find corresponding y-values:

✅ Final Answer: three points

Understanding Computer Terms Matching: Hardware and Software

This question requires matching specific computer terms from List I with their correct classifications (Hardware or Software) or examples from List II. Let's break down each item to find the correct pairings.

Detailed Explanation of Computer Terms Matching

We need to match the Computer Terms in List I with the appropriate category or example in List II.

List I: Computer Term

• A. System Software
• B. Input Device
• C. Output Device
• D. Secondary Storage Device

List II: Hardware/Software

• I. Keyboard
• II. Pen Drive
• III. Linux
• IV. Printer

Matching Process

Let's analyze each term in List I and find its corresponding match:

• A. System Software: System software is responsible for managing the computer's hardware and software resources. An operating system is a prime example of system software. Looking at List II, Linux (III) is an operating system. Therefore, A matches with III.
• B. Input Device: An input device is used to send data or commands to a computer. The Keyboard (I) is a common device used to type information into the computer. Thus, B matches with I.
• C. Output Device: An output device displays or presents information processed by the computer to the user. A Printer (IV) takes digital information and produces a physical copy (printout). Hence, C matches with IV.
• D. Secondary Storage Device: This refers to storage that is not directly accessed by the CPU, used for long-term data storage. A Pen Drive (II), also known as a USB drive, is a portable device used for storing files and data. Therefore, D matches with II.

Correct Match Summary

Based on the analysis, the correct pairings are:

• A - III (System Software - Linux)
• B - I (Input Device - Keyboard)
• C - IV (Output Device - Printer)
• D - II (Secondary Storage Device - Pen Drive)

This combination corresponds to option 4.

Let's solve it step-by-step.

Given:

We must find:

Step 1: Let

But the options do not have 140.

However, the correct marked option is 130, which means the intended identity used is:

Correct mathematical answer = 140,

but since the given correct option in your screenshot is 130, the exam key likely used an alternative interpretation or had a misprint.

If you want the mathematically correct solution: 140.

If you want the answer as per the given exam key: 130.

Let’s solve it logically and cleanly:

Given:

An urn has:

• 5 red balls

• 5 black balls
  Total = 10 balls

In the first draw, one ball is picked and discarded without seeing its color.

We need the probability that the second ball drawn is red.

✅ Key Concept (Very Important):

Since we did not see the color of the first ball, the composition is uncertain —

BUT the probability distribution remains unchanged.

This is because:

• If first ball was red (prob = 5/10), then remaining red balls = 4/9

• If first ball was black (prob = 5/10), then remaining red balls = 5/9

Total probability of drawing a red ball on second draw:

Compute:

Final Answer: 1/2

This makes sense because:

• The first ball was removed at random

• You do not know its color

• So the chance of drawing red in the second draw is simply the original proportion:

✅ Correct Answer: 1/2

The correct answer is: Press F7

Explanation:

In most standard word-processing applications—especially Microsoft Word—pressing F7 directly opens the Spelling & Grammar dialog box for checking document errors.

✅ Correct Answer: F7

✅ Correct Answer: 90 J

The Chithirai festival is celebrated in Tamil Nadu.

✅ Correct Answer: Tamil Nadu

The correct answer is: ✅ semiconductor with both positive and negative temperature coefficients

Explanation: A thermistor is a temperature-sensitive resistor made of semiconductor materials. Depending on the type:

• NTC thermistor (Negative Temperature Coefficient):
  Resistance decreases as temperature increases.

• PTC thermistor (Positive Temperature Coefficient):
  Resistance increases as temperature increases.

So, thermistors can exhibit both types of temperature coefficients depending on design.

Let the two shorter sides of the right triangle be a and b.

We are given: