Physics-Magnetism & Electricity at Work (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 25 - 29 of 47

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 1058 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 450.00 or

Question number: 25

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A technician has 10 resistors each of resistance 0.1Ω. The largest and smallest resistances that he can obtain by combining these resistors are

Choices

Choice (4) Response

a.

1 Ω and 0.01 Ω respectively

b.

1 Ω. and 0.1 Ω respectively

c.

10 Ω and 1 Ω respectively

d.

0.1 Ω and 0.01 Ω. Respectively

Question number: 26

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Eight identical spherical mercury drops charged to a potential of 20 V each are coalesced into a single spherical drop

Choices

Choice (4) Response

a.

Internal energy of the system decreases

b.

The potential remains the same i. e. , 20 V

c.

The internal energy of the system remains the same

d.

The new potential of the drop is 80 V

Question number: 27

» 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: 28

» 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: 29

» 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

f Page
Sign In