1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Figure show the circular coil carrying current $I$ kept very close but not touching at a point $A$ on a straight conductor carrying the same current $I$. The magnitude of magnetic induction at the centre of the circular coil will be

MHT CET 2019 3rd May Morning Shift Physics - Moving Charges and Magnetism Question 1 English

A
$\frac{\mu_0 0}{2 r}\left(1+\frac{1}{\pi}\right)$
B
$\frac{\mu_0 l}{2 \pi r}$
C
$\frac{\mu_0 l}{2 r}$
D
zero
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V . If the ratio of output to input power is 0.8 , then the current drawn by primary winding is

A
3.6 A
B
5.0 A
C
2.5 A
D
2.8 A
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A sonometer wire is in unison with a tuning fork, when it is stretched by weight $w$ and the corresponding resonating length is $L_4$. If the weight is reduced to $\left(\frac{w}{4}\right)$, the corresponding resonating length becomes $L_2$. The ratio $\left(\frac{L_1}{L_2}\right)$ is

A
$4: 1$
B
$1: 4$
C
$1: 2$
D
$2: 1$
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the speed of an electron of hydrogen atom in the ground state is $2.2 \times 10^6 \mathrm{~m} / \mathrm{s}$, then its speed in the third excited state will be

A
$5.5 \times 10^6 \mathrm{~m} / \mathrm{s}$
B
$5.5 \times 10^5 \mathrm{~m} / \mathrm{s}$
C
$8.8 \times 10^5 \mathrm{~m} / \mathrm{s}$
D
$6.8 \times 10^6 \mathrm{~m} / \mathrm{s}$
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