Physics-Magnetism & Electricity at Work (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 30 - 34 of 47

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Question number: 30

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Three equal resistors each equal to “r” are connected as shown in figure. The equivalent resistance between points A and B is

Three resisters connection

Three Resisters Connection

Find equivalent resistance between two points

Choices

Choice (4) Response

a.

Equation

b.

r

c.

3r

d.

Equation r

Question number: 31

» Physics » Magnetism & Electricity at Work

Assertion-Reason▾

Assertion (Ꭺ)

Net torque in the current carrying loop placed in a uniform magnetic field (pointing inwards) is zero.

A uniform magnetic field

A Uniform Magnetic Field

The current carrying loop placed in a uniform magnetic field.

Reason (Ꭱ)

Magnetic moment (m) is inwards.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is false but Ꭱ is true

Question number: 32

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

The freezer in a refrigerator is located at the top section so that

Choices

Choice (4) Response

a.

The heat gained from the environment is high

b.

The motor is not heated

c.

The entire chamber of the refrigerator is cooled quickly due to convection

d.

The heat gained from the environment is low

Question number: 33

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

If an electric current is passed through nerve of a man, then man

Choices

Choice (4) Response

a.

Is excited

b.

Begins to weep

c.

Becomes insensitive to pain

d.

Begins to laugh

Question number: 34

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

The permanent magnet is made from which one of the following substances?

Choices

Choice (4) Response

a.

Ferromagnetic

b.

Paramagnetic

c.

Diamagnetic

d.

Electromagnetic

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