The space surrounding a magnet in which the magnetic force is exerted is
magnetic field
magnetic flux
magnetic point
magnetic pole
magnetic strength
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements about the concept of solid friction is NOT true?
It always acts in the direction of motion
It causes wear and tear in car tyres
It depends on the nature of the surfaces in contact
It is independent of the area of the surfaces in contact.
It reduces the efficiency of the machine
Correct answer is A
No explanation has been provided for this answer.
15.0s
18.0s
22.5s
30.0s
45.0s
Correct answer is C
\(\frac{1}{16} = (\frac{1}{2})^n\)
\((\frac{1}{2})^4 = (\frac{1}{2})^n\)
\(n = 4\)
90 secs = 4 half lives
1 half life = \(\frac{90}{4}\) secs
= 22.5 secs
0.25ms-1
0.50ms-1
1.00ms-1
2.00ms-1
4.00ms-1
Correct answer is C
No explanation has been provided for this answer.
232
450
550
2750
11000
Correct answer is D
No explanation has been provided for this answer.