1
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A potentiometer balances at 44 cm when a cell of internal resistance $1 \Omega$ is in the secondary circuit. To obtains the balancing point at 40 cm , the resistance to be connected parallel to cell is

A
$20 \Omega$
B
$10 \Omega$
C
$30 \Omega$
D
$5 \Omega$
2
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two wires made of the same material have lengths in the ratio $2: 3$ and radii in the ratio $8: 9$. If the same potential difference is applied across the ends of the wires, the ratio of the electric currents flowing through them is

A
$5: 6$
B
$6: 5$
C
$4: 3$
D
$32: 27$
3
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The magnetic field at a perpendicular distance of one metre from a wire carrying current of 1 A is

A
$2 \times 10^{-7} \mathrm{~T}$
B
$2 \times 10^{-8} \mathrm{~T}$
C
$2 \times 10^{-6} \mathrm{~T}$
D
$2 \times 10^{-9} \mathrm{~T}$
4
TS EAMCET 2023 (Online) 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A circular coil of area $2 \mathrm{~cm}^2$ has 1000 turns. If the current through the coil is 1 A , then its magnetic moment is

A
$4 \mathrm{~A}-\mathrm{m}^2$
B
$0.2 \mathrm{~A}-\mathrm{m}^2$
C
$0.4 \mathrm{~A}-\mathrm{m}^2$
D
$2 \mathrm{~A}-\mathrm{m}^2$
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