Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 82 - 86 of 136

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Question number: 82

» Physics » Magnetism & Electricity at Work

Appeared in Year: 2013

MCQ▾

Question

An electric iron draws a current of 15 A from 220V supply. What is the cost of using iron for 30 min every day for 15 days if the cost of unit (1 unit = 1 KW/hr) is 2 rupees?

Choices

Choice (4) Response

a.

Rs. 60

b.

Rs. 40

c.

Rs. 10

d.

Rs49.5

Question number: 83

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

Question

The speed-time relation of a car whose weight is 1500 kg has shown in the given graph. How much braking force has been applied at the end of 7sec. to stop the car in 2 sec?

Graph of Speed vs. Time

Graph of Speed vs. Time

Calculate the breaking force of the car at end of 7 sec to stop the car

Choices

Choice (4) Response

a.

1200N

b.

9000N

c.

4800N

d.

2000N

Question number: 84

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

Question

The speeds of sound in air and sea-water are given to be 340 m/s and 1440 m/s, respectively. A ship sends a strong signal straight down and detects its echo after 1.5 s. The depth of the sea at that point is

Choices

Choice (4) Response

a.

0.255 km

b.

2.16 km

c.

1.08 km

d.

0.51 km

Question number: 85

» Physics » Motion and Force

Appeared in Year: 2013

MCQ▾

Question

The distance covered by a body moving along X-axis with initial velocity V and uniform acceleration ‘a’ is given by Equation . This result is a consequence of:

Choices

Choice (4) Response

a.

Newton’s III rd law

b.

Newton’s I st law

c.

Newton’s II nd law

d.

None of the above

Question number: 86

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A technician has 10 resistors each of resistance 0.1Ω. The largest and smallest resistances that he can obtain by combining these resistors are

Choices

Choice (4) Response

a.

1 Ω and 0.01 Ω respectively

b.

1 Ω. and 0.1 Ω respectively

c.

10 Ω and 1 Ω respectively

d.

0.1 Ω and 0.01 Ω. Respectively

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