Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 92 - 97 of 136

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Question number: 92

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Two rods of same material and length have their electric resistance in ratio 1: 2. When both rods are dipped in water, the correct statement will be

Choices

Choice (4) Response

a.

Loss of weight will be in the ratio 1: 2

b.

A has more loss of weight

c.

B has more loss of weight

d.

Both b. and c. are correct

Question number: 93

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Ohm’s law is true

Choices

Choice (4) Response

a.

for gases at low temperature

b.

for electrolytes when current passes through them

c.

for metallic conductor

d.

for diode when current flows

Question number: 94

» Physics » Work and Energy

MCQ▾

Question

The resistivity of a wire

Choices

Choice (4) Response

a.

increases with the length of the wire

b.

decreases with the area of cross-section

c.

decreases with the length and increases with the cross-section of a wire

d.

None of the above

Question number: 95

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

The masses of the three wires of copper are in the ratio Equation and their lengths are in the ratio 1: 3: 5. The ratio of their electrical resistance is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 96

» Physics » The Universe

MCQ▾

Question

Rainbow is formed due to a combination of

Choices

Choice (4) Response

a.

Dispersion and focusing

b.

Dispersion and total internal reflection

c.

Refraction and absorption

d.

Refraction and scattering

Question number: 97

» Physics » Light

MCQ▾

Question

Two lenses are placed in contact with each other and the focal length of the combination is 80 cm. If the focal length of one is 20 cm, then the power of the other will be

Choices

Choice (4) Response

a.

-3.75D

b.

-1.0 D

c.

4.0 D

d.

1.66 D

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