NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1044 - 1047 of 2142

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Question number: 1044

» Ray Optics » Lens Maker's Formula and Lens Formula

Assertion-Reason▾

Assertion (Ꭺ)

A double convex lens has focal length 10 cm. When the lens is immersed in water its focal length becomes 40 cm.

Reason (Ꭱ)

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.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

Question number: 1045

» Ray Optics » Lens Maker's Formula and Lens Formula

MCQ▾

Question

A convex lens is made out of a substance of 1.2 refractive index. The two surfaces of lens are convex. If this lens is placed in water whose refractive index is 1.33 it will behave as:

Choices

Choice (4) Response

a.

Plane glass plate

b.

like a prism

c.

Convergent lens

d.

divergent lens

Question number: 1046

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

An ac source is connected to a resistive circuits. Which of the following statements are false?

(1) Current leads-the voltage

(2) Current lags behind the voltage

(3) Any of (1) or (2) may be true depending upon the value of resistance

(4) Current and voltage are in same phase

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1, 2 and 3 are correct

d.

1 and 2 are correct

Question number: 1047

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

MCQ▾

Question

An alternating e. m. f. of angular frequency is applied across an inductance. The instantaneous power developed in the circuit has an angular frequency

Choices

Choice (4) Response

a.

b.

c.

d.

f Page
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