BYJU'S - Class 9 & 10

What is the principle behind the working of an electric fuse?

1 year ago | [YT] | 218

BYJU'S - Class 9 & 10

🧠#PYQ #Q4
The zeroes of a polynomial x² + px + q are twice the zeroes of the polynomial 4x² - 5x - 6. The value of p is:

1 year ago | [YT] | 170

BYJU'S - Class 9 & 10

🧠#PYQ #Q3
If cos(α+β) = 0, then value of cos((α+β)/2) is equal to:

1 year ago | [YT] | 140

BYJU'S - Class 9 & 10

🧠#PYQ #Q2
The centre of a circle is (2, 0). If one end of a diameter is at (6, 0), then the other end is at:

1 year ago | [YT] | 90

BYJU'S - Class 9 & 10

🧠#PYQ #Q1

Find the sum of the first 30 terms of the AP: -30, -24, -18, . . . .

1 year ago | [YT] | 80

BYJU'S - Class 9 & 10

Which of the following statements is/are incorrect?

i) A body moving with varying velocity may have constant speed.
ii) If velocity of a body is varying, its speed must be varying.
iii) A body moving with varying speed may have constant velocity if its direction of motion remains constant.
iv) A body moving with varying speed may have constant velocity if it has zero acceleration.

1 year ago | [YT] | 93

BYJU'S - Class 9 & 10

🧠#BrainBuzz #Q9
State true or false:
The consecutive angles of a parallelogram are complementary.

1 year ago | [YT] | 148

BYJU'S - Class 9 & 10

Hey 10th Graders,

We had to move Arsh Mam's class to Monday because she is dealing with health issues. We apologize for any inconvenience this may cause, but we want to make sure you have the best class experience possible.

Here's the link to the previous session on Arithmetic Progressions. Make sure you watch it before coming to the next class.

youtube.com/live/bIMa4-edPeE?si=ww2wRjAqUw32k9qv

1 year ago | [YT] | 145

BYJU'S - Class 9 & 10

In a chemistry experiment, a student is asked to identify an unknown solution using a series of tests. The student performs the following tests:
Litmus Test: The blue litmus paper turns red when dipped in the solution.
Reaction with Metal: The solution reacts vigorously with zinc metal, producing a gas that burns with a pop sound.
pH Test: The pH of the solution is found to be approximately 2.
Based on these observations, which of the following is the most likely identity of the unknown solution?

1 year ago | [YT] | 127

BYJU'S - Class 9 & 10

🧠BrainBuzz #Q8 #Statistics
If the value of each observation of statistical data is increased by 3, then the mean of the data:

1 year ago | [YT] | 185