Class 12th

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

During the cultural festival of IIT Delhi six competitions were conducted. The cultural festival was inaugurated in the morning of 18th August, Wednesday and continued till 25th August. In the span of 8 days six competitions namely debate, folk dance, group dance, drama, singing, and group song, were organized along with various other cultural programs. The information available from the IIT Delhi is:

I. Only one competition was held in a day

II. Singing competition was not conducted on the closing day.

III. Group dance was conducted on

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Class 12th Communication Systems

Contributor-Level 10

From the given information: Data for competition from 18th August to 25th August (From Wednesday to Wednesday) From (V), no competition was held on 19th and 22nd (i.e. on Thursday & Sunday)

From (VI), Drama was held on 23rd

From (III) and (VII), Debate must have been held on 21st, Flash-p on 20th and Group song on 24th. From (II), Singing competition was held on 18th.

Hence, from this we can draw following result.

Date	Day	Competitio n
18	Wednesda y	Singing competition
19	Thursday	—
20	Friday	Group dance
21	Saturday	Debate
22	Sunday	—
23	Monday	Drama
24	Tuesday	Group song
25	Wednesda y	Folk dance

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5 months ago

A transmitting antenna has a height of 320 m and that of receiving antenna is 2000m. The maximum distance between them for satisfactory communication in line of sight mode is 'd'. The value of 'd' is……….km.

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Vishal Baghel

Contributor-Level 10

$d = \sqrt[]{2 R h_{T}} + \sqrt[]{2 R h_{R}}$

$\Rightarrow d m = (\sqrt[]{2 * 6400 * 1 0^{3} * 320} + \sqrt[]{2 * 6400 * 1 0^{3} * 2000})$

= 224 km

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5 months ago

Class 12th Physics

A circuit is arranged as shown in figure. The output voltage V0 is equal to………V.

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Vishal Baghel

Contributor-Level 10

$Δ V_{D 1} = Δ V_{D 2} = l * R = 0$

Since resistance is zero in forward bias.

=> V₀ = 5V

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5 months ago

Seven friends Jai, Kishan, Gopal, Pritam, Pranay, Sumit and Sohan went on vacations to Goa, Paris, Tokyo, Bangladesh and Andaman & Nicobar Island. They traveled by air, sea or over land. All vacations took place between January and May. No two people went on vacation the same place at the time. However, two people went on vacation at two places.

I. In March and May two vacations took place. Also, two vacations were in Bangladesh.

II. Four people travelled over land. Two people travelled by ship. One person took a flight.

III. Kishan was not the first to go. He travelled over land.

IV. Pranay did not go in May. He went to Goa, whic

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Contributor-Level 10

We are not certain about Kishan and Sohan as either of them could have visited Bangladesh. We know that Sumit definitely went to Tokyo, but he is not among the given options.

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5 months ago

I. In March and May two vacations took place. Also, two vacations were in Bangladesh.

II. Four people travelled over land. Two people travelled by ship. One person took a flight.

III. Kishan was not the first to go. He travelled over land.

IV. Pranay did not go in May. He went to Goa, whic

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Contributor-Level 10

From the table in the solution to the first question of the set, we see that Gopal went on a vacation in May.

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5 months ago

Class 12th Physics

Two cells of same emf but different internal resistance r₁ and r₂ are connected in series with a resistance R. The value of resistance R, for which the potential difference across second cell is zero, if:

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Raj Pandey

Contributor-Level 9

Given

$I = \frac{2 E}{R = r_{1} + r_{2}}$

E₁ = E₂ = E - (i)

Potential drop across second cell is

$V_{A} - E_{2} + I r_{2} = v_{B}$

According to question VA – VB = 0

E2 lr2 = 0

$\Rightarrow R = r_{2} - r_{1}$

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5 months ago

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

I. In March and May two vacations took place. Also, two vacations were in Bangladesh.

II. Four people travelled over land. Two people travelled by ship. One person took a flight.

III. Kishan

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Contributor-Level 10

Month	Person	Destination	Mod e
January	Pranay	Goa	Land
Februar y	Sumit	Bangladesh	Land
March	Kishan/Sohan	Bangladesh	Land
March	Jai	Andman & Nicobar	Air

		island
April	Pritam/Sohan	Paris	Sea
May	Kishan/Pritam	Goa	Land
May	Gopal	Tokyo	Sea

From the above table we get that Jai visited Andman & Nicobar island.

From table, we get that Pranay went Goa for vacation.

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

P1, P2, P3, P4, P5, P6 and P7 are seven members of a family. There are two married couples among them belonging to two different generations. Each of them like different Fast food – Pizza, Burger, Momos, Sandwich, Burito, Fried Chicken and Donuts. The grandfather in the family likes Fried Chicken. None of the ladies likes Burger or Momos. P4 is son of P1 who likes Pizza. P7 is P3's daughter-in-law and she likes Burito. P2 is grandfather of P6 who likes Sandwich. P3 is mother of P5 who likes Burger.

How many female members a

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