Tags Class 12th

Class 12th

Get insights from 12k questions on Class 12th, answered by students, alumni, and experts. You may also ask and answer any question you like about Class 12th

Follow Ask Question

12k

Questions

Discussions

Active Users

Followers

New answer posted

5 months ago

Class 12th English

Accountant, Manager, Sweeper, CEO, Software engineer and Technician are sitting around a circle facing the centre for a forest meeting. Accountant, who is to the immediate left of CEO, is not the neighbor of Sweeper. Software engineer, the neighbour of Sweeper is not the neighbour of Manager. Technician is between CEO and Manager.

What is the position of Software engineer?

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

Immediate right of sweeper

0 0

New answer posted

5 months ago

Class 12th Physics

A zener diode of power rating 2W is to be used as a voltage regulator. If the zener diode ha s breakdown of 40V and its has to regulate voltage fluctuated between 6 V and 14 V, the value of R_s for safe operation should be_______ $Ω .$

0 Follower 3 Views

alok kumar singh

Contributor-Level 10

Maximum current through zener diode,

$i = \frac{2}{10} = 0.2 A$

When unregulated voltage is 14V,

Potential difference across Rs,

V_S = 14 – 10 = 4V

$R_{S} = \frac{V_{S}}{i} = \frac{4}{0.2} = 20 Ω$

0 0

New answer posted

5 months ago

Class 12th English

Directions for questions: Read the information carefully and answer the questions given below.

Which of the following is true?

0 Follower 1 View

Payal Gupta

Contributor-Level 10

0 0

New answer posted

5 months ago

Class 12th Environmental chemistry

The gas 'A' is having very low reactivity reaches to stratosphere. It is non-toxic and non-flammable but dissociated by UV-radiations in stratosphere. The intermediates formed initially from the gas 'A' are:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

In stratosphere CFC get broker down by powerful UV/radiation releasing Cl^·

$C F_{2} C l_{2} (g) \overset{U V}{\to} C l^{•} (g) + C^{•} F_{2} C l (g)$

0 0

New answer posted

5 months ago

Class 12th Atoms

X different wavelengths may be observed in the spectrum from a hydrogen sample if the atoms are excited to states with principal quantum number n = 6? The value of X is_______.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

No. of different wavelengths

$= \frac{n * (n - 1)}{2} = \frac{6 * 5}{2} = 15$

0 0

New answer posted

5 months ago

Class 12th Biomolecules

Out of following isomeric forms of uracil, which one is present in RNA?

0 Follower 13 Views

Vishal Baghel

Contributor-Level 10

This is isomeric form of Uracil, which is present in RNA

0 0

New answer posted

5 months ago

Class 12th English

On the occasion of Janmasthmi, four persons – A1, A2, A3 and A4 bought certain dozens of bananas for their respective houses. Their wives also went to the market and bought bananas. Further it is known that

I. The wives are W1, W2, W3 and W4

II. A1 bought as many bananas as his wife, A2 bought twice as many as his wife, A3 bought three times as many as his wife, and A4 bought four times as his wife.

III. W1 bought 2 dozens bananas, W2 bought 3, W3 and W4 bought 4 and 5 dozens of bananas respectively.

IV. The four couples bought 44 dozen of bananas between them.

Who is the wife of A4 among the four females?

0 Follower 1 View

Payal Gupta

Contributor-Level 10

Please find the below answer

0 0

New answer posted

5 months ago

Class 12th English

I. The wives are W1, W2, W3 and W4

II. A1 bought as many bananas as his wife, A2 bought twice as many as his wife, A3 bought three times as many as his wife, and A4 bought four times as his wife.

III. W1 bought 2 dozens bananas, W2 bought 3, W3 and W4 bought 4 and 5 dozens of bananas respectively.

IV. The four couples bought 44 dozen of bananas between them.

Who brought the maximum number of bananas among t

...more