NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1045 - 1048 of 2184

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Question number: 1045

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

Edit
Assertion-Reason▾

Question

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.

Ꭺ is false but Ꭱ is true

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 true but Ꭱ is false

Question number: 1046

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

Edit
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.

Convergent lens

b.

like a prism

c.

Plane glass plate

d.

divergent lens

Question number: 1047

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

Edit
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.

1,2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

Question number: 1048

» Electromagnetic Induction & Alternating Currents » Power in AC Circuits

Edit
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.