Question

3.
A certain freezing process requires that room temperature be lowered from 40°C at the
rate of 5°C every hour. What will be the room temperature 10 hours after the process
begins?​

Answer 1

Step-by-step explanation:

Current, I=50A

Distance, r=2.5 m

Magnetic field, B=2πrμoI

B=4.0×10−6T

According to maxwell's right hand, the direction of field is upward.

Answer 2

Answer:

Given that

Let us assume that the lowered temperature as negative,

Initial temperature = 40°C

Change in temperature per hour = -5°C

Change in temperature after 10 hours = (-5) × 10 = -50°C

∴The final room temperature after 10 hours of freezing process = 40°C + (-50°C)

= -10°C

The room temperature 10 hours after the process begins= -10°C