Questions

Q:

Working of safety fuses depends upon

1. magnetic effect of the current

2. chemical effect of the current

3. magnitude of the current

4. heating effect of the current

Select the correct answer using the code given below.

 

A) 1, 2, 3 and 4 B) 1, 2 and 3 only
C) 3 and 4 only D) 4 only
 
Answer & Explanation Answer: C) 3 and 4 only

Explanation:

An electric fuse is a device which is used to limit the current in an electric circuit. The fuse safeguards the circuit and the electrical appliances from being damaged.

The fuse wire is generally an alloy of lead and tin. It has a low melting point and breaks the circuit if the current exceeds a safe value. The thickness and length of the fuse wire depends on the maximum current allowed through the circuit.

It is connected in series in the beginning of the electric circuits.

If too many electrical appliances of high power rating (like electric iron, water heater etc) are switched on at the same time, they draw an extremely large current from the circuit. This condition is called overloading and it can cause overheating of the wiring and lead to a fire. (heating effect and magnitude of the current)

 

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Filed Under: Physics
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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives.

 


It was a bittersweet moment for me when I found out that I had been selected for the Sakura Science Exchange programme, a Robotics and IoT workshop in Japan. A fully-funded opportunity of a lifetime. Fly off to Saitama without a care on the world, and all I had to do was put into practice what I love to do – computer science. The bitter part of the episode – that I would lose two weeks of IB education, an almost literal mountain to cover when I got back – was quickly forgotten when I envisioned myself programming robots in the country that gave us Anime and sushi! It was with the eagerness to have an extended vacation in an un-visited land, and the opportunity to learn more about a subject that I am passionate about, that I headed to the Kempegowda International Airport outside Bengaluru. Little did I know this would be the experience of a lifetime, more for the endearing values of the Japanese culture that made their mark on me than anything else. The first feature of Japanese society that called out to me was the Discipline. Walking into the Narita International Airport, used as I was to the noisy crowds back in India, I quite literally lost my breath to the sight that awaited me. Be it the security check or baggage claim, somehow there was a silence that felt right. Everyone went about their activities without any confusion. And, contrary to the bharatiya custom of lazy pot-bellied officials, every guard and all counter personnel did what they were supposed to do to ensure this flow was maintained.

 

What was it that the writer did not like about his trip to Japan?

 

A) That the trip was so short B) That he would be compelled to eat sushi
C) That he would miss a fortnight worth of IB education D) That Japanese people are too disciplined
 
Answer & Explanation Answer: C) That he would miss a fortnight worth of IB education

Explanation:
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0 72009
Q:

Rearrange the parts of the sentence in correct order.

Seven decades ago,
P-Orwell wrote a clutch
Q-for the post-World War II British journal Polemic
R-of essays

A) RPQ B) QRP
C) PRQ D) QPR
 
Answer & Explanation Answer: C) PRQ

Explanation:
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0 71962
Q:

Rearrange the parts of the sentence in correct order.

 

P: But the achievements of science have not come to man as a ripe apple falls in the lap of a man sitting under an apple tree.
Q: Science is not just the result of observation and experience.
R: It is, on the other hand , the result of centuries of hard work done by man, even at the risk of his own life or health.
S: There is no doubt that science has been the greatest boon to man so far.

A) QRPS B) SPQR
C) QPRS D) SQRP
 
Answer & Explanation Answer: B) SPQR

Explanation:
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0 71959
Q:

Select the antonym of

 

escort

 

A) entourage B) cavalier
C) foe D) convoy
 
Answer & Explanation Answer: C) foe

Explanation:
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0 71928
Q:

Why are the Gypsies regarded as of Indian origin?

1.They follow Indian religious practices.

2.Their language, called Romani, is an Indo-Aryan language.

3.They believe that they came from India.

4.Epigraphic evidence locates their original home in Uttar Pradesh.

 

Select the correct answer using the code given below.

A) 1 and 4 only B) 2 only
C) 1, 2 and 4 D) 2 and 3
 
Answer & Explanation Answer: D) 2 and 3

Explanation:

Gypsies are believed to have arrived in Europe from northern India in the 1400s. They were called Gypsies because Europeans thought they came from Egypt. This ethnic minority is made up of distinct groups called “tribes” or “nations.” Most of the Gypsies in German-occupied Europe belonged to the Sinti and Roma tribes.

Romani (romani ćhib) Romani, or Romany, is an Indo-Aryan language spoken by about 5-6 million Roma people throughout Europe and the USA. The largest concentrations of Roma people live in Turkey, Spain and Romania. In English these people are often called Gypsies.

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0 71915
Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives.

My coat's pretty warm, even though it cost £9.99 and came from the flea market. It had a label in it, CHRISTIN BIOR, but I cut it out as soon as I got home. You can't work where I work and have CHRISTIN BIOR in your coat. You could have a genuine vintage Christian Dior label. Or something Japanese. Or maybe no label because you make your clothes yourself out of retro fabrics that you source at Alfies Antiques. But not CHRISTIN BIOR.

As I get near Catford Bridge, I start to feel a knot of tension. I really don't want to be late today. My boss has started throwing all sorts of hissy fits about people "swanning in at all times," so I left an extra twenty minutes early, in case it was a bad day. I can already see: It's a god-awful day. They've been having a lot of problems on our line recently and keep cancelling trains with no warning. Trouble is, in London rush hour, you can't just cancel trains. What are all the people who were planning to get on that train supposed to do? Evaporate?

Why is her boss angry?

A) Because he has started suffering from fits. B) Because it is a bad day.
C) Because she was late the day before. D) Because employees are coming late to work.
 
Answer & Explanation Answer: D) Because employees are coming late to work.

Explanation:
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0 71862
Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives.


Everyone expected Mary Zophres to win for her retro-revival Technicolor clothes in La La Land — the eventual winner, Colleen Atwood for Fantastic Beasts and Where to Find Them, seemed surprised too. But as other awards began to slip away from the well-reviewed musical, a theme could be teased out. What is Fantastic Beasts if not a plea for equal treatment of people, magical or otherwise? Then, Arrival, a film about the inherent benignity of aliens (read immigrants) won for Best Sound Editing. Hacksaw Ridge, which is, in a way, an anti-guns movie, won in two categories. Fences, about an African-American father who fears racial discrimination, took home the Oscar for Best Supporting Actress. Earlier, Moonlight, featuring two minority communities (black and gay), won for Best Supporting Actor. This turned out to be one of those years the Oscar voter was underestimated. As a majority of voters are actors, there was the tendency to think they'd reward La La Land, a celebration of creation: the heroine wants to make movies, the hero wants to make jazz. It looked like the year of The Artist all over again.

 

What does the lead female actor in La La Land want to do?

A) Make jazz B) Make movies
C) Make music D) Make magic
 
Answer & Explanation Answer: B) Make movies

Explanation:
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