1
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the masses of three wires of same material are in the ratio of $1: 2: 3$ and their lengths are in the ratio of $3: 2: 1$, then electrical resistances of these wires are in the ratio

A

$1: 1: 1$

B

$1: 2: 3$

C

$9: 4: 1$

D

$27: 6: 1$

2
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

As shown in the figure, in a Wheatstone's bridge, three resistances $P, Q$ and $R$ are connected in the three arms and the fourth arm is formed by two resistances $S_1$ and $S_2$ connected in parallel. The condition for the bridge to be balanced is

TS EAMCET 2023 (Online) 13th May Evening Shift Physics - Current Electricity Question 31 English

A

$\frac{P}{Q}=\frac{2 R}{S_1+S_2}$

B

$\frac{P}{Q}=\frac{R\left(\mathrm{~S}_1+\mathrm{S}_2\right)}{\mathrm{S}_1 \mathrm{~S}_2}$

C

$\frac{P}{Q}=\frac{R\left(\mathrm{~S}_1+\mathrm{S}_2\right)}{2 \mathrm{~S}_1 \mathrm{~S}_2}$

D

$\frac{P}{Q}=\frac{R}{S_1+S_2}$

3
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A current $i$ flows in an infinitely long, straight and thin walled pipe, then

A

the magnetic field at all the points inside the pipe is same, but not zero

B

the magnetic field at any point inside the pipe is zero

C

the magnetic field is zero only on the axis of the pipe

D

the magnetic field is different at different points inside the pipe

4
TS EAMCET 2023 (Online) 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A closely wound solenoid of 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm . If the current carried is 8 A , then the magnitude of the magnetic field inside the solenoid near its centre is approximately

A

$1.5 \times 10^{-2} \mathrm{~T}$

B

$2.5 \times 10^{-2} \mathrm{~T}$

C

$3.5 \times 10^{-2} \mathrm{~T}$

D

$4.5 \times 10^{-2} \mathrm{~T}$

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