Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 23 - 27 of 133

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Question number: 23

» Physics » Motion and Force

MCQ▾

Question

A proton enters a magnetic field of flux density 1.5 wb/m 2 with a speed of 2 × 10 7 m/s at an angle of 30° with the field. The force on a proton will be

Choices

Choice (4) Response

a.

24 × 10 -12 N

b.

2.4x10- 12 N

c.

0.24x10- 12 N

d.

0.024x10- 12 N

Question number: 24

» Physics » Measurement

MCQ▾

Question

Convert the temperature of 50°C to Kelvin scale.

Choices

Choice (4) Response

a.

303 K

b.

323 K

c.

333 K

d.

313 K

Question number: 25

» Physics » Light

MCQ▾

Question

An object is placed at a distance of 30 cm from a concave mirror and its real image is formed at a distance of 30 cm from the mirror. The focal length of the mirror is

Choices

Choice (4) Response

a.

15 cm

b.

30 cm

c.

20 cm

d.

45 cm

Question number: 26

» Physics » Motion and Force

MCQ▾

Question

An iron ball and a wooden ball of the same radius are released from the same height in vacuum. They take the same time to reach the ground. The reason for this is

Choices

Choice (4) Response

a.

acceleration due to gravity in vacuum is same irrespective of the size and mass of the body

b.

there is no acceleration due to gravity in vacuum

c.

acceleration due to gravity in vacuum depends upon the mass of the body

d.

in vacuum, there is a resistance offered to the motion of the body and this resistance depends upon the mass of the body

Question number: 27

» Physics » Motion and Force

MCQ▾

Question

A person is standing in an elevator. In which situation, he finds his weight less than actual when

Choices

Choice (4) Response

a.

the elevator moves downward with uniform velocity

b.

the elevator moves upward with constant acceleration

c.

the elevator moves upward with uniform velocity

d.

the elevator moves downward with constant acceleration

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