i and ii
i, ii and iii
ii, ii and iv
ii, ii and iv
iii, iv and iv
Correct answer is A
No explanation has been provided for this answer.
i, and iv
ii and iii
ii and iv
i, ii and iii
i and iii
Correct answer is B
- the spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments.
- The mass of a body is measured using beam or chemical
- Chemical balance is a delicate instrument which is used to weigh small amounts of substances
- The weight of a body can be measured using a spring balance
A simple pendulum with a period of 2.0s has its length doubled. Its new period is
1.00s
1.41s
0.3s
2.83s
4.00s
Correct answer is D
Using \(\frac{T_1}{T_2}\) = \(\sqrt\frac{L_1}{L_2}\)
\(\frac{2}{T_2}\) = \(\sqrt\frac{L_1}{2L_1}\)
T2 = 2.83sec
Which of the following is most strongly deflected by magnetic field?
\(\gamma\) - rays
X- particle
\(\beta\) - particles
X - rays
Correct answer is C
No explanation has been provided for this answer.
1.3 x 1015Hz
7.5 x 105Hz
1.2 x 1011Hz
7.5 x 1014Hz
Correct answer is D
F = \(\frac{V}{\lambda}\)
= \(\frac{3 \times 10^8}{400 \times 10^{-9}}\)
= 75 x 1015Hz
= 7.5 x 10^14 Hz