1
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
 

A current 'I' flows in anticlockwise direction in a circular arc of a wire having $\left(\frac{3}{4}\right)^{\text {th }}$ of circumference of a circle of radius R. The magnetic field ' $B$ ' at the centre of circle is ( $\mu_0=$ permeability of free space)

A
$\frac{\mu_0 \mathrm{I}}{3 \mathrm{R}}$ in upward direction
B
$\frac{\mu_0 I}{2 R}$ in downward direction
C
$\frac{3 \mu_0 \mathrm{I}}{8 \mathrm{R}}$ in downward direction
D
$\frac{3 \mu_0 \mathrm{I}}{8 \mathrm{R}}$ in upward direction
2
MHT CET 2024 16th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When a resistance of $200 \Omega$ is connected in series with a galvanometer of resistance ' $G$ ', its range is ' $V$ '. To triple its range, a resistance of $2000 \Omega$ is connected in series. The value of ' $G$ ' is

A
$200 \Omega$
B
$400 \Omega$
C
$600 \Omega$
D
$700 \Omega$
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